IMPROVEMENTS IN COMPOUND STEAM ENGINES FOR MARINE AND OTHER PURPOSES
Year: 1878

page_text: LETTERS PATENT to Andrew Betts Brown, Civil Engineer, of Rose Bank
Iron Works, Edinburgh, in the County of Edinburgh, for the Invention of
'IMPROVEMENTS IN COMPOUND STEAM ENGINES FOR MARINE AND OTHER
PURPOSES."
Sealed the 7th February 1879, and dated the 24th October 1878.
PROVISIONAL SPECIFICATION left by the said Andrew Betts Brown at the
Office of the Commissioners of Patents on the 24th October 1878.
ANDREW BETTS BROWN, Civil Engineer, of Rose Bank Iron Works, Edinburgh,
in the County of Edinburgh. "IMPROVEMENTS IN COMPOUND STEAM ENGINES FOR
MARINE AND OTHER PURPOSES."
My Invention consists of improvements in compound marine or other engines
having one high and one low pressure cylinder with cranks at right angles or
thereby. They have hitherto been constructed in such a manner that a hand valve
has been used to admit high-pressure steam into the low-pressure valve casing or
cylinder for the purpose of converting the engines for the moment into high-pressure
engines, so that they can be made to start readily. They have also been fitted with
a special steam engine for turning the main engines round in the absence of steam
in the main boilers.
My improvements consist in introducing a valve to the low-pressure valve casing,
which is automatically actuated by an hydraulic apparatus, which at the same time
serves as a governor of the speed of the engines.
Another improvement consists in utilizing the starting engine, which is controlled
by an bydraulic cylinder, for the purpose of turning round the engines in the
absence of steam in the main boiler.
My improved valve consists of an ordinary single-ported slide valve attached and
conveying boiler steam directly to the low-pressure casing. The spindle of this
valve is attached to the delivery valve of a double-acting pump, so that when the
engines are at rest the low-pressure casing valve remains open. This pump is

page_text: worked either from the cross head of the main engines or from the side levers
driving the air pumps, so that when the engines are in motion the delivery valve is
raised against a spring, and so closes the boiler communication with the low-pressure
valve chest. Attached to this same spindle is a lever arrangement which operates
upon the high-pressure_forward excentric by a Dod's wedge motion or other arrange-
ment for shortening the stroke, so that a variable expansion is obtained; or it may
be attached to the reversing handle and reversing engine or the throttle valve. The
effect is, when the engines tend to race, the high-pressure cylinder slide valve has
its stroke shortened proportionately.
The reversing engine I-employ-is-that-having a-steam-cylinder controlled by a
hydraulic cylinder with a variable lever valve motion, as described in my Patent
No. 2253, 1871. To adapt this reversing engine so that it shall be made to turn
the main engines I construct immediately over a notched turning wheel-a-hydraulic-
cylinder having a double acting piston and rod. To the cross head of the rod I
attach two double connecting rods which operate upon two sets of levers; these
levers have their fulcra upon the main engine frame.
Between each set of levers is fitted a reversible spring paul, so that every recipro-
cation of this turning cylinder gives a continuous motion to the turning wheel in
either direction. To obtain water pressure to cause these reciprocations I connect.
by a pipe the upper end of the cylinder to the upper end of the starting engine
cylinder, while the lower end or annular area I connect to the lower end or annular
area of the starting engine. By suitable cocks I can open communication to the
turning engine or stop it. The cross head of the starting engine, which by con-
_necting rods communicates motion to the weigh shaft, I form with a cotter or other
appliance so that it can be readily disengaged. By other similar cocks I can shut
off the communication from the controlling cylinder of the reversing engine with
its hydraulic valve gear. By shutting this connection and opening the connection
with the turning cylinder I can cause the piston of it to reciprocate in obedience to
the reciprocations of the starting engine by working the hand steam valve. The
proportions of the starting engine cylinder and turning cylinder are arranged to
suit the relative powers required. By connecting the starting engine to an auxiliary
boiler, steain may be had to turn the main engines.

page_text: leading from the side of the ship, through which water is drawn to compensate
leakage in the pump. The tension of spring g, which acts to close the valve D, is
adjusted by the nuts h
When the engine is started the delivery-valve D rises, compresses the spring g,
and lifts the valve f so as to close the ports e and shut off the high pressure steam
from the low pressure cylinder. As the engine increases in speed and attain their
full motion the valve D rises still higher, and in doing so raises the end of the
lever, which said lever, through the intervention of the way shaft I and levers
connected therewith, actuates the wedge motion J and shortens the stroke of the
excentric K. The excentric K. then so actuates the expansion valve as to keep the
-motion-of-the-engine-constant. The-pressure-water-from-the-pump governor_may_
if desired be employed to actuate steering gear, or be used for other purposes if
desired.
Sheet II Fig. 1 is a side elevation and Fig. 2 a front elevation of compound
pumping engines constructed in accordance with the first and second heads of my
Invention. Here there are two double-acting pumps C, both of which deliver water
through the valve D into a steam or like accumulator E. The said engines work
intermittently, according to the damage for water. The action of the governing
pumps is similar to that described in reference to Figs. 1 and 2, Sheets I. and III.,
and like letters denote the same parts. When they come to a state of rest the
spring "g" causes the delivery valve to fall into its seat, and at the same time moves
the wedge motion J into such a position that the high pressure eccentric works in
full gear, while communication is opened between the steam pipe L and the low
pressure valve chest, thus converting these engines for the moment into ordinary
high pressure engines. When the engines start by steam being turned on by the
action of the piston of the accumulator opening the port M in descending, the
delivery valve D, Fig. 1, Drawing No. 3, rises and converts the engines into com-
pound, and as the demand for water increases the engines will increase in speed, and
the high pressure eccentric K will have its stroke shortened, and so cut off the steam
expansively in the high pressure cylinder A. In these engines no link-motion is
required, and advantage can be taken of the usual delivery or cheque valve to
form a sufficient governor and automatic starting gear.
Engines constructed as above described require no link motion, and advantage is
taken of the action of the hydraulic pump or governor to actuate both the expansion
or throttle valve and a valve for admitting high pressure steam temporarily to the
low-pressure cylinder.
Although a hydraulic governor alone has been shown for actuating the valve f
admitting high pressure steam to the low pressure cylinder, other governors may be
adapted to effect the same object. The said value ƒ may have a governor separate
from the ordinary governor of the engine, and a governor of any ordinary or desired
kind may be used in combination therewith.
Under the third head of my Invention I so construct or arrange any ordinary or
desired engine for actuating the starting gear of marine or other compound engines
that the said starting engine shall be available for turning round the main engines,
say at stated periods when not in use, or when access is to be had to the pistons or
slide valves.
•
I prefer to use the engine shown at M, Fig. 1 and 2, Sheet I. This engine
consists of a steam cylinder having a piston and rod which passes into a water or oil
cylinder cataract N. The cataract N is fitted with my arrangement of automatic
levers O, as described in the Specification to Her Majesty's British Letters Patent
No. 2253, of the year 1871, granted to me. By means of the reversing handle P the
engine may be made to reciprocate quite steadily, so as to cause the water to How
from either side of the hydraulic piston when arranged for reversing the links. In
order to enable the above mentioned engine to be employed for turning the main
engines I fit another hydraulic cylinder at Q, and support the said cylinder by any

page_text: suitable means over the top of the notched or indented wheel R, which is secured to
the main shoft S, shown in detail, Fig. 3, Sheet III. M is the steam cylinder of the
starting engine; N, the controlling hydraulic cylinder; O, the way shoft connected
with the link notion; P, the lever; Q, the hydraulic cylinder of the turning
engine; and R, the notched turning wheel keyed to the shoft S. The cylinder Q is
fitted with a piston, double leathers a, and rod with cross-head guided at b. To
this crosshead are attached two double connecting rods c. These actuate the
levers d, having their fulcra at e. Between these levers are fitted reversable pawls f,
which are kept in any desired position by the springs g.
The effect of this system
of levers is that upon the reciprocation of the piston a a continuous motion in any
direction will be given to the wheel R, that is, a notch being moved both in the up
and down stroke. Communication is made between the top and bottom of the
hydraulic cylinder Q by the pipes and i, which respectively connect the annular
and large areas of the cylinder Q with the starting engine cylinder N. By shutting
communication with the ordinary valve gear at j, disengaging the cotter m so as to
set free the piston of the steam cylinder M, and moving the reversing handle P to
and fro, the starting engine will act as an ordinary reciprocating pump, and will
cause similar reciprocation in the turning engine piston a.
Having now described the nature of the said Invention, and the manner of
carrying the same into practice, I would remark that I do not limit myself to the
exact form of apparatus or details of construction as herein described, so long as the
novel features of my Invention are retained, and I would have it understood that I
do not claim as my Invention governing the speed of an engine by the wedge
motion varying the stroke of the eccentric by the action of a governor; nor do I
claim governing an engine by causing a valve to rise and fall by a pump driven by
these engines and operating on the throttle valve; but what I do claim is,-
First. Constructing or fitting compound engines with a valve or valves actuated
by a hydraulic or other governor, and operating substantially in the manner set
forth under the first part of my Invention.
Second. The combination of a valve or valves and governor constructed constructed,
arranged, and operating substantially as set forth under the first part of my Inven-
tion, with mechanism for regulating the admission of steam to the high pressure
cylinder or cylinders, substantially as set forth under the second part of my Invention.
Third. Constructing engines employed for operating the starting gear of com-
pound engines in such manner that they may be employed for turning round the
main engines, substantially as set forth.
Fourth. In engines employed for turning compound engines the combination of a
pressure cylinder and accessaries with a system of levers and connections arranged
and operating substantially as set forth under the third part.
In witness whereof, I, the said Andrew Betts Brown, have hereunto set my
hand and seal, this Twenty-second day of April, in the year of our Lord One
thousand eight hundred and seventy-nine.

page_text: I, ANDREW BETTS BROWN, Civil Engineer of Rosebank Iron Works, Edinburgh,
in the County of Edinburgh, the patentee seek leave to amend the specification
of Letters Patent, No. 4255 of 1878, as shown in red ink in the Queen's Printers
copy of the original specification hereunto annexed :-
The amendments proposed are as follows :-
To strike out the third and fourth claims, lines 34 to 39 page 5, and also the
relative descriptive parts, namely, the sentence in lines 13, 14, page 3, the sentence
lines 25 to 28 page 3, and the sentences commencing at line 44 page 4 and ending
at line 18 page 5 and also figure 3, on sheet 3 of the drawings.
To correct various clerical errors in the description and drawings.
My reasons for making this amendment are as follows:-
That I do not now consider the matter to which the parts proposed to be struck
out relate to be of sufficient utility to be retained; and that misconstruction of my

page_text: DECISION.
I hereby grant leave to the said Andrew Betts Brown to amend the said
Specification in the manner proposed in his Application for amendment filed on 5
the 11th day of March 1886.
J. CLARK HALL,
Deputy Comptroller-General.

page_text: LETTERS PATENT to Andrew Betts Brown, Civil Engineer, of Rose Bank
Iron Works, Edinburgh, in the County of Edinburgh, for the Invention of
"IMPROVEMENTS IN COMPOUND STEAM ENGINES FOR MARINE AND OTHER
PURPOSES."
Dated the 24th October 1878.
PROVISIONAL SPECIFICATION left by the said Andrew Betts Brown at the
Office of the Commissioners of Patents on the 24th October 1878.
ANDREW BETTS BROWN, Civil Engineer, of Rose Bank Iron Works Edinburgh
in the County of Edinburgh. "IMPROVEMENTS IN COMPOUND STEAM ENGINES
FOR MARINE AND OTHER PURPOSES."
My Invention consists of improvements in compound marine or other engines
having one high and one low pressure cylinder with cranks at right angles or
thereby. They have hitherto been constructed in such a manner that a hand valve
has been used to admit high-pressure steam into the low-pressure valve casing or
cylinder, for the purpose of converting the engines for the moment into high-pressure
engines, so that they can be made to start readily. They have also been fitted with
a special steam engine for turning the main engines round, in the absence of steam
in the main boilers.
My improvements consist in introducing a valve to the low-pressure valve casing,
which is automatically actuated by an hydraulic apparatus, which at the same time
serves as a governor of the speed of the engines.
Another improvement consists in utilizing the starting engine, which is controlled
by an hydraulic cylinder, for the purpose of turning round the engines, in the
absence of steam in the main boiler.
My improved valve consists of an ordinary single-ported slide valve, attached, and
conveying boiler steam, directly to the low-pressure casing. The spindle of this
valve is attached to the delivery valve of a double-acting pump, so that, when the
engines are at rest the low-pressure casing valve remains open.
This pump is
worked either from the cross head of the inain engines, or from the side levers
driving the air pumps, so that when the engines are in motion the delivery valve is
raised against a spring and so closes the boiler communication with the low-pressure
valve chest. Attached to this same spindle is a levor arrangement, which operates
upon the high-pressure forward oxcentric by a Dod's wedge motion, or other arrange-
ment for shortening the stroke, so that a variable expansion is obtained. Or it may
be attached to the reversing handle and reversing engine or the throttle valve. The

page_text: effect is, when the engines tend to race, the high-pressure cylinder slide valve has
its stroke shortened proportionately.
-The-reversing engine I employ is that having a steam cylinder controlled by a
hydraulic cylinder, with a variable-lover_valve motion, as described in my Patent
No. 2253, 1871. To adapt this-reversing engine.so that it shall-be-made-to-turn
the main engines, I construct immediately over a notched turning wheel a hydraulic
cylinder having a double acting piston and rod. To the cross head of the rod I
attach two double connecting rods, which operate upon two sets of levers. These
levers have their fulcra upon the main engine frame.
Between each set of levers is fitted a reversible-spring paul, so that every recipro-
cation of this turning cylinder gives a continuous motion to the turning wheel in-
either direction. To obtain water pressure to cause these reciprocations, I connect
by a pipe the upper end of the cylinder to the upper-end of the starting engine
cylinder, while the lower end or annular area I connect to the lower end or annular
area of the starting engine. By suitable cocks I can open communication to the
turning engine or stop it. The cross head of the starting engine, which by con-
necting rods communicates motion to the weigh shaft I form with a cotter or other
appliance, so that it can be readily disengaged. By other similar cocks I can shut
off the communication from the controlling cylinder of the reversing engine, with
its hydraulic valve gear. By shutting this connection and opening the connection
with the turning cylinder 1 can cause the piston of it to reciprocate in obedience to
the reciprocations of the starting engine, by working the hand steain valve. The
proportions of the starting engine cylinder and turning cylinder are arranged to
suit the relative powers required. By connecting the starting engine to an auxiliary
boiler steam may be had to turn the main engines.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Andrew Betts Brown in the Great Seal Patent Office on the
24th April 1879.
:
ANDREW BETTS BROWN, Rose Bank Iron Works, Edinburgh, in the County of
Edinburgh. "IMPROVEMENTS IN COMPOUND STEAM ENGINES FOR MARINE AND
OTHER PURPOSES,"
My Invention consists of improvements in compound marine or other engines in
which there is a high and a low pressure cylinder and a sheaft having cranks at
right angles to each other, or nearly so; and the said Invention is more or less
applicable to existing compound engines. Hitherto such engines have been so
constructed that it has been necessary, for the purpose of causing them to start
readily, to admit high-pressure steam into the low-pressure cylinder by means
of a valve operated by hand. Furthermore-for-turning round-the-said-engines-in
the--absence--of--steam-in-the-main--boiler--or--boilers--special-engines--have-been
employed.
My improvements consist,-
First. In constructing or fitting the said engines with a valve for controlling the
passage of high pressure steam to the low pressure cylinder or cylinders, and in
automatically actuating such valve or valves at the required times by means of a
hydraulic apparatus or governor receiving motion from the main engines in any
ordinary or desired manner.
Second. In combining apparatus or appliances constructed, arranged, and
operating in the manner set forth under the above first head, with mechanism for
regulating the notion of the expansion or other valve or valves admitting steam to
the high pressure cylinder or cylinders.
Third: In-so-constructing-engines-employed-for-operating the starting-gear-of
for-turning round-the-said-compound engines-in-the-absence-of-steam-in-the--main
boiler-or-boilers.
compound-marine--or--other-engines-that-they-shull-be-capable--of--being-employed
:
DESCRIPTION OF THE DRAWINGS.
Sheet 1. Fig 1. is a back elevation, and Fig: 2. a side elevation of compound
marine engines, having a high pressure cylinder A, and a low pressure cylinder B,
and these Figures are illustrative of the first and second heads of my Invention.
The automatic starting and expansion gear is shewn at the back of the engine.

page_text: In the above two views a hydraulic pump governor is employed to actuate both
the low pressure cylinder valve and the expansion valve. C is a double acting
pump serving as a governor,-which delivers the water pumped through the valve-D
E, side levers which give motion to the pump. At F is the valve which controls the
passage of high pressure steain to the low pressure cylinder. The said valve is con-
nected to and receives motion from the delivery valve at D. The pump C is fitted
with an air vessel G to ensure a steady flow of water through the delivery valve ut D.
The spindle of the delivery-valvo-is-carried.downwards at H, and is connected to
the way sheaft I, which operates the wedge motion J so as to shorten or lengthen the
stroke of the eccentric K. The eccentric actuates by means of the connecting rod L
the expansion valve, which-may-be-of-any-ordinary-or-desired-kind. Figs. 1 and 2.
Sheet 3. show the arrangement of the above-described mechanism in detail. The
delivery valve D, which rests on the usual valve seat, is constructed with a cylindrical
guide having wedge shaped ports d therein, so that on a small motion of the
engines, and with it of the pump, taking place, a considerable rise will be given to the
valve D, and with it the piston valve in the casing Fattached to the low pressure
cylinder. The piston valve fis-formed--or--construeted--with controls ports a., b.,
which allow of high pressure steam passing into the low pressure cylinder when the
valve is at its lowest position, but which are closed when the said valve is
raised by the action of the delivery valve D. The branch c. in connection with the
valve 1 communicates with the double acting pump 6, C. s is the barrel of the
pump; t, the piston; u, the suction valves; v, the discharge valves; w, vones air
vessel; and a, a pipe leading from the side of the ship, through which water is
drawn to compensate leakage in the pump. The tension pressure of spring g,
which acts to close the valve D, is adjusted by the nuts h.
When the engine is started the delivery valve D rises, compresses the spring g,
and lifts the valve f so as to close the ports e and shut off the high pressure steam
from the low pressure cylinder. As the engine increases in speed and attain their
its full motion the valve D rises still higher, and in doing so raises the end of the
lever j, which said lever, through the intervention of the way shaft I and levers
connected therewith, actuates the wedge motion J and shortens the stroke of the
excentric K. The excentric K then so actuates the expansion valve as to keep the
motion of the engine constant. The pressure water from the pump governor may
if desired be employed to actuate steering. gear, or be used for other purposes if
desired.
Sheet 1. Fig: 1. is a side elevation and Fig: 2 a front elevation of compound
pumping engines constructed in accordance with the first and second heads of my
Invention. Here there are two double-acting pumps C, both of which deliver water
through the valve at D into a steam or like accumulator E. The said engines work
intermittently, according to the damage demand for water. The action of the
governing pumps is similar to that described in reference to Figs. 1 and 2, Sheets I.
and III., and like letters denote the same parts. When they come to a state of
rest the spring "g" causes the delivery valve to fall into its seat, and at the same
time moves the wedge motion J into such a position that the high pressure
eccentric works in full gear, while communication is opened between the steain
pipe L and the low pressure valve chest, thus converting these engines for the
moment into ordinary high pressure engines. When the engines start by steam
being turned on by the action of the piston of the accumulator opening the port M
in descending, the delivery valve D., Fig: 1. Drawing No. 3., rises and converts the
engines into compound, and as the demand for water increases the engines will
increase in speed, and the high pressure eccentric K will have its stroke shortened,
and so cut off the steam expansively in the high pressure cylinder A. In-these
engines-no-link-motion-is-required-and-advantage-ean-be-taken of the usual-delivery
or-eheque-valve-to-form-a-sufficient-governor-and-automatic starting-gear-
Engines constructed as above described require no link motion, and advantage is
taken of the action of the hydraulic pump or governor to actuate both the expansion

page_text: or-throttle valve and a valve for adınitting high pressure steam temporarily to the
low-pressure cylinder.
Although a hydraulic governor alone has been shown for actuating the valve f
admitting high pressure steam to the low pressure cylinder, other governors may be
adapted to effect the samne object. The said valve may have a governor separate
from the ordinary governor of the engine, and a governor of any ordinary or desired
kind may be used in combination therewith.
Under-the-third-head-of-my-Invention---so-construct-or-arrange-nny-ordinary-or
desired-engine-for-netuating-the-starting-gear-of-marine-or-other-compound-engines
that-the-said starting-engine-shall be-available-for-turning-round-the-main-engines,
say-at-stated-periods-when-not-in--use-of-when-neeess-is-to-be-had-to-the-pistons-or
slide-valves:
I--prefer--to-use--the-engine--shown-at-M. Fig:-1-and-2-Sheet-I.-This-engine
eonsists of a-steam-eylinder-having-a-piston-and-red-which passes-into-u-water-or-eil
eylinder-entarnet-N. The enturnet N is fitted-with-1
-my-arrangement-of--automatie
levers-O-as-described-in-the-Specification-to-Her-Majesty's-British-Letters-Patent
engine--may-be-made-to-reeiproente-quite-stendily--so-as-to-cause-the-water-to-flow
No: 2253-of the year-1871-granted-to-me.--By-means-of-the-reversing-handle-P-the
from-either-side-of the-hydraulie--piston-when-arranged-for-reversing-the-links.-In
main
order-to-enable-the-above-mentioned-engine-to-be-employed-for-turning-the-
engines-I-fit-another-hydraulic-cylinder at Q-and-support-the-said-cylinder by any
suitable-means-over-the-top--of-the-notched-or-indented-wheel--B--which--is-seeured
to-the-main-shoft-S-shown-in-detail-Fig. 3.-Sheet-IH.-M-is-the--steam--cylinder
of-the-starting-engine N-the-controlling-hydraulic--cylinder-O-the-way-shoft--een-
neeted-with-the-link-motion,-P-the-lever, Q-the-hydraulic-eylinder of-the-turning
engine-and-R-the-notched-turning-wheel--keyed-to-the-shoft-S.-The-eylinder-Q-is
fitted-with-a-piston-double-leathers-a-and-rod-with-cross-head-guided-at-b. To this
erosshead-are-attached two-double-connecting-rods--c.----These-nctuate the levers-d.
having-their-fulera-at-e-Between-these-levers-are-fitted-reversable-pawls-f-which
are-kept-in-any-desired-position-by-the-springs-g.-The-effect-of-this--system-of
levers-is-that-upon-the-reciprocation-of-the--piston-a-a--continuous--motion-in-any
direction-will-be-given-to-the-wheel--R-that-is-a-noteh-being-moved--both-in-the-up
and-down-stroke. Communication-is-made--between--the--top--and--bottom-of--the
hydraulie-eylinder-Q-by-the-pipes-h-and-i-which-respectively--conneet-the--anunlar
and-large-areas-of-the cylinder Q-with-the-starting-engine-eylinder N. By shutting
communication-with-the--ordinary-valve--geur-nt-j;-disengaging-the-eetter-m-so-as
to-set-free-the-piston-of-the-steam-cylinder-M,-and--moving-the-reversing hundle P
to-and-fro,-the-starting-engine-will-act-us-an-ordinary-reciprocating-pump-and-will
eause-similar-reciprocation-in-the-turning-engine-piston-a.
Having now described the nature of the said Invention, and the manner of
carrying the same into practice, I would remark that I do not limit myself to the
exact form of apparatus or details of construction as herein described, so long as the
novel features of my Invention are retained, and I would have it understood that I
do not claim as my Invention govorning the speed of an engine by the wedge
motion varying the stroke of the eccentric by the action of a governor; nor do I
claim governing an engine by causing a valve to rise and fall by a pump driven by
these engines and operating on the throttle valve; but what I do claim is;-
First. Constructing or fitting compound engines with a valve or valves actuated
by a hydraulic or other governor, aud operating substantially in the manner set
forth under the first part of my Invention.
Second. The combination of a valve or valves and governor constructed, een-
structed arranged, and operating substantially as set forth under the first part of
my Invention, with mechanism for regulating the admission of steam to the high
pressure cylinder or cylinders, substantially as set forth under the second part of
my Invention.

page_text: Third-Constructing-engines-employed-for-operating-the-starting-gear-of-com-
pound-engines-in-snch-manner-that-they-may-be--employed-for-turning-round-the
main-engines-substantially-as-set-forth:
Fourth. In engines employed-for-turning compound-engines-the-combination-of
a--pressure-cylinder--and necessaries with-a-system-of-levers---and--connections
arranged-and-operating substantially-as-set-forth-under-the-third-part.
In witness whereof, I, the said Andrew Betts Brown, have hereunto set my
hand and seal, this Twenty-second day of April, in the year of our Lord
One thousand eight-hundred-and-seventy-nine.
ANDREW BETTS BROWN. (L.S.)