American watchman and Delaware advertiser. [volume] (Wilmington, Del.) 1822-1828, 1823-05-27
Extract Of q letter from an American gentleman,
20 the Editors olthe New York Daily Advertiser,
dated.
"LoNDoN. March IA, 1928.

0ateds
"LoNDoN. March Ia, 1928
sThe enclosed sheet is sent you that you NAV be
enabled to form some idea of the importance alta
ched to Mr.. Perkins Steam Engine by the scien-
iihc world On the last page made some remarks,
and was in hopes to have been able by this packet
20 have sent you the result OF his experiments with
q full description of his machinery, but time will
not permit but will endeayor To in nv next, and
will only add, that think his principle NAV be con-
sdered fully established, and i, only temains to
prove tire absolute quantity of power gained over
;he old method II is moi true as was stated IN an
American paper that he had a steam boat building
10 run to the East Indies, but he has the model Of
boat bull on an improved plan and adapted to his
machinery, which think highly of.
esterday the Lords Of the Admiralty made
him visit to see his machinery indeed he is al
most daily visited by OF the highest rank who
are received with that frankness and simplicity of
manners that becomes an American citizen. Such
men as Pc! kns and Church, the one 10 muI,iply
the means OF knowledge, and the other to convey
II to the distant shores Of the globe, do honor 10 any
country"
Copy Of letter from Lord .Hiato to s. Lock, Esq.
dated.
MINTo, March Q.
"Mapy thanks for your second letter, which
have just received. Nothing can be more sa,isGac-
tory than the testimony you quote in confederation
OF the, souhdness Of Mr.. Perkins viuws. Indeed,
since last wrote to YOU have received a very full
description OF the whole Of his plan. and OF the prn-
ciple upon which j, Is founded, which are not con-
hned, as you supposed, to the mere effect OF com
preston, in reducing the capacity of water for heat,
but turn upon the high ratio Of expansion oil steam
at high temperature.
"Few people would have thought OF making q
power OF 20 or so amospheres, first obtained, sub
sersient TO the maintenance Of power Of the same
amount, with small expenditure of heats
Ihe foregoing copies were accompanied by a
note requesting Tor the chairman and committee oil
the East India House, permission to visit and ms
pect Mr.. Perkins machinery.
March 10th. Since these letters were written.
Mr. Perkins has made further experiment, with his
steam engine and its operations thus far, are per-
feetiy satisfactory and mahe to the princnles
ne nts' 'aia down. The only remaining point to be
established is the absolute quantity OF power aimed
by his method, 10 the quantity of fuel cxpended
which VIII be decided this week.
his engine he considers equal 10 ten horse
power. Inc boiler or generator, as he calls H. !.
OF brass or composition, % inches thick and which
is also hooped, and contains about eight yallons q
water. lhis is enclosed 10 sheet IRON stove, SC
constructed as to consume the smoke. The gene
rator berg pressed constantly full is heated 10 ;
high temperature, when the engine is put in mo
sion ard small quantity Of water is ietted in. which
forcing out the same quantity OF heated water i
flashes into steam ard gives off the necessary power
The steam is then conducted down to neatly TN
boiling point, where it ia again forced into tie gene
rator. 1t requires about 1T ofthe power generate.
20 force it back, and when the Temperature il ono
raised, il requires but small quantity oil fuel To kee
1t up. In his experiments he worked it at so al
mospheres, or 400 los. to the inch, anG had a sur
plus power ofs5 atmospheres for use. In one ,
his tubes he has safety 6atb, so that, in case ,
explosion, no harm can arise.
Capt. VIM. M.Crsne, took command of the [
$. naval station at Portsmouth, on Friday the ISt
iHste