Richmond dispatch. [volume] (Richmond, Va.) 1884-1903, 1899-03-10

bute this result TO the use OF revoivins
e~cecament or tourbillon. q device III
which the frame that carries the escayc-
ment IA made TO revolve slowly put cur
tinuousIy, In the main frame py tps o."
ton OF tho watch, thus reducins 'ne s,'
In time keeping from change OF posi-
,,a,,"a niaoe of mechanism which does
NOT materially increase the comphca'ioh
80 tho watch. involving In fact the anoi-
lion NJ one wheel only. While the marhs
30 this watch for temperature coihPeh9
zion are not claimed TO be unsurpaSs~u
ne many as 1871 having been recorueu uu'
90 twenty-those for smallness in varia-
tion I'm daily rate and for absence oi po
sitional errors are unusually soo"'
,,,,,,. onorac.e,istic thoroughness In the
ao,a,Is of it's various departments, me-
cbanicallv considered, the city OF Boston
hoe lately furnished the chief OF It's sur
,a,,,g division with standard Wy
r,san9 NJ which the measuring or estates
I'm that metropolis OF somewhat copipIi-
Gated topography may no" 10 ~
nlished 10 the greatest degree vi 49,
ness For absolute correctness no "'v.
one Il Is alleged, exists anywhere ~.
oven In the office of the Coast survey
Washington. which Is TIE repos,tViS
the United States standafds' nl' -"
nroved standard was constrncteu III -
cester and conveyed to Boston on ~ ~
ea,-core II Is l02 feet long. ana res's
-, Tor use In box, the bar placed on
hraes rollers set ten feet apart thus IN
s,,rino an innnItesimal amount or trlctioh
rht,e evanston and contraction are goihS
On during the variations In temperature
THE standard is made Of drawn Steel az
ara also the measuring tapes.
r-o nroduce an electric arc light capable
If giving satisfactory prac'ical result. .S
I'm use under water, various ehor's haNe
been nut forth In the past, put nov WIZ
,ha desired success; recently, however
.nohoicol journals report that a submarine
49, iorn az from LOCO TO 1000 candle
,ower brought forward by the Wen
,,oo,,,r rnanufacturers I'm this line. Bur
Iii, O. HALL now meets oil requirements
,rhis lann Is represented to be absOluteiy
yvatertight. with an inner ana outer s'op',
the MINER part Of the outer glope pet's
hermetically sealed to the metal cylliluet
containing the feeding mechanism ~
means of rubber gaskets and rilss-.No
feeding mechanism m TINS case uiile'i,'s
from anything Of the Ordinary lSpe W
being Enclosed In a cylinder po,h va
and air tight. From the top OF the - ~
der through q carefully packed aperIu,e,
issue the two insulated wires, "n'In, ~,
convenience, are bound togethe' ir.o g.
cohle. the lower portion OF the lamp i
Injected bv an eight-wire guard. rests
70 this device at q depth of twenty-five
loot are said to have proved Satisfactorily
, ura of vire-rope tramway lately COM
,latsd for the Plymouth Cordage COMPANY
at plymouth. Mass, presents some NV
features OF n specially unitarian cHSI
acter and worthy Of imitation uhue'
eimiIar conditions. This line, OF sohle
what less than twelve hundred iest iohs'
will be used for carrying Daieu noInp p
from the warehouse TO the mili. Al one
I r,T,t tbe lines make nearly a right-angle
bend around which the cars pass without
beIng detached from the traction rope OF
nanInnIated in any way, thus demon
etratino the feasibility of passing ahsieS
without detaching. The structural Won
of the line at plymouth is Of steel Near
tba ANGLE station the line passes over
ratIroad tracks spanned by bridge. cars
90 enecial design for the facilities needed
are employed, and along the warehouse
For distance of 900 feet shunt rails eN-
tend so that cars can be loaded at nuriie-
rous points.
II &c not generally known. except TO tpe
initiated in metallurgical details tnat lfoIi
chemically pure is too soft for mechahical
nurposes 1t IS. IN fact, rarely touhu III
native masses, but mineralized IN ores
with different elements, metals ana SUI
stances in the form of oxides, chlorides'
and duorides. and, when reduced to me-
taIIio state. these alloy and combine; upon
such alloys or combinations depends me
commercial value Of the ore. mus the
,ninerelized ores OF iron are brought
through the agency Of the blast furnace
To the well-known metal designated pig
iron " the constituent elements OF Whlch
are Of the utmost Importance TO the
foundrvman. as upon these depends the
value and usefulness of the cast metal.
Now. the allied metals with which IRON
will combine equally. chemically and me
chanically. when reduced I'm blk st fur-
mace. are thirteen, six of these being
electro negative to 1t and seven electro
positive. The electro positive are cal
cium. magnesium, beryllium, CHROMIUM
aluminium. manganese. and zinc; copper
and zinc are pyro-electro, and change po-
larities with iron at different tempera-
lures The electromagnetic metals are
chromium. vanadium, copper, CADMIUM
cobalt, and nickel.
Washington as a Farmer.
IvnalH