, 1876-12-16

WATCHES.
WALT THAN
WATCHES
AT THE
CENTENNIAL
'1' 'D''F5[5F EEHIBZ2ZOu,

Exhibition.
Tile Jurors Of CroupXXv., on Instrn.
nents Of Precision, etc., (prof. Watson,
Director Of tIle University Observatory,
inn Arbur, Mief., Chairman Of Com.
mittee on Ilorologieal lnStruuents), III
tllc course Of tlleir: report say, in speak.
ing Of tic unadjusted grades Of our
goods:
"This Company il enabled TO pro.
duce. in the case Of sacl movements,
better Watches lllan arc produced by
l|lc other methods in uye. Tic lnyc
examined a large number Of watch
movements Of these grades with plain
Or compensated balances, which had
uniformly good trains and we're well
sprung, 50 that their timekeepiug prop.
critics must bc Of Tie higllest order
for Watches not specially adjusted. We
hare also examined tic operation Of
thc machinery for The production Of tlle
parts, and the instruments used in
Sprinying Tic Watches, aud Tor other
adjustments, and we Iaye been con.
rinced Of The certainty of the processes
they employ, and VIC consider them just.
" entitled to special eollllncndalion.'
The jurors conclude their long re.
port with 1ho following paragraph in
reference 10 our adjusted Watches:
"rIlc Company also exhibited Matches
tle parts Of which, we're also naae by
machinery ani highly finished, anil
which had bcen adjusted for isocIlrontsm,
for position Of tho balance and for tenn
perature. Since these Watches Iln,l not
been subjected to trials In au astro-
noInical observatory, and Tho requisite
astronomical Instruments were In posi-
ton anil available nj the United Statcs
Government Building. we asked for and
received tell movements from lie exhibit
10 he submitted 10 tie requisite tests.
These tests we're rs follows: lst. For
temperature, forty-cight hours In tllc
refrigerator aud forty-eight hours III n
heated room. Cd. For errors Of position
anil isoohr0uisn. The tests were during
period 0f ten days. The results Showed
tho excellence Of The several adjustments,
thu small crrs'rs outstanding being far
within the limits considered Us tie proper
standard Of excellence In lilo adjustment
Of flrst-c1ass pocket chronometers."
ThiS report Was signed BY Sir Will:
INN Thompson, Prols. Henry, Barnard,
Watson, and ililgard, +. favrc prrret,
and others. Tile results above re.
lerrel 10, stated in figures, Showed in
tho trials lur variation d daily rato
under extreme temperatures, AZ com.
pared will The results Of. trials anu.
ally made Of SWiss Watches Of The first
clilSs, reported by thc Director Of tho
keu}r}latel Observatory, aS follows:
VARIATION FOR le or TEMPERATURE
FOE "a HOURS.
WALrnAA--os. O. ttevrn onc~hundredths Of q
Swiss, year 1871. o. Il tftccn o,s-hualrt,tls Of
;. 1871 a. sseSsei = aa'tesn one.auDasea.,, Of
" 1875. o. Ii thirteen one .1.utareaths Of
Stated III tic same way, tic compart-
sou OF results from tic trials for errors
Of position ana isoclronism ,nalcs tho
following exhibit:
ERRORS Of POSITION AND 1s0oH-
R0N1SM.
WA1rMAM--1s. o. {onu and soycn one-huudrcdths
Swiss, year 1875 !. III ttso and fifty. nine one.
I hulldrcaths uf Il sccona.j
!" 1B'l-:s. ~ ttwn anl twrnty.aeycn.
| Une.hnnhrtltIls OF Hec1nI.l
. ~ 1S15-1t. "a lone mud ninety .rc.en. one.
hundredths nf srvund.)
III submitting 10 tl.e Commission tho
table Of which the above is summary,
Prof. Watson says, Sept. Q, In regard to
other tcsas necessary to make the whole
trial complete, ~ hare III progress at
this Observatory u further trial of tia
kalnc movements iii tlle conpletest furm
possible, both for tho adjustments already
tested mud for tho steatincss OF the rate of
each for n considerable period Of time.
The limited time OF my residence
In Philadelphia did not permit Mle to