Bauhaus-Universität Weimar

Titel:
Abridged Catalogue of Electrical Measuring Instruments and other Scientific Apparatus: Catalogue 175
Person:
Biddle, James G. [Including Willyoung]
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit13655/23/
22 
JAMES G. BIDDLE, DREXEL BUILDING, PHILADELPHIA. 
tached to the instrument the pendulum is automatically carried a trifle further 
to the left and then freed, when it swings back to the right, catching up the 
index as it passes, to be caught fast by the detent, the instrument is then ready 
for a second experiment. Successive experiments may thus be made to follow 
one another with practically no lost intervening time. 
The pendulum is so made as to be almost frictionless, and careful tests 
have shown the error in the use of this instrument to be almost inappreciable. 
The scales are all empirically graduated by comparison with the 
TIMES OF FALLING BODIES, AND THEIR ACCURACY IS GUARANTEED. 
For many of the usual re-action experiments the Fitz chronoscope will be 
found superior to any from of chronograph method, being much simpler, more 
convenient, and quicker. 
These instruments have been supplied to the laboratories of the World’s 
Museum, Chicago, and of the Women’s College, Lynchburg, Va.; also to the 
gymnasium of the Y. M. C. A., Chicago, 111., and to the University of Colo¬ 
rado, Boulder, Col., State Normal School, San Jose, Cal., etc. 
NET PRICE LIST. 
Dr. Fitz’s Pendulum Chronoscope—Style A. 
'This is the original open form as first made by Dr. Fitz. The base and 
supporting frame are of neatly japanned metal, while the working parts are of 
lacquered brass. It is made with several different ranges as below. Each 
instrument is supplied in wooden carrying-case. 
Dr. Fitz’s Pendulum Chronoscope—Style B. 
Same as above, but enclosed. A mahogany dust-proof cover, with glass 
front, fits down over the working parts. It may be removed by means of two 
fastenings. 
Single Scale Instruments. 
Time of full 
swing 
First gradu¬ 
ation. 
*After first division 
the remainder 
occur every 
Style A, 
open 
Style B, 
enclosed 
No. i >2 second 
1-20 second 
5-1000 second. 
$60 00 
$75 «O 
“21 
.1-10 “ 
I-IOO 
60 00 
75 00 
“ 3 2 
1-5 
2-100 “ 
60 00 
75 00 
Multiple Scale Instruments. 
No. 4 ; with two interchangeable pendulums as in 
Nos. i and 2............ 
70 OO 
85 00 
“ 5 ; with two interchangeable pendulums as in 
Nos. 3 and 4............ 
70 OO 
85 00 
“ 6; with three interchangeable pendulums as 
in Nos. i, 2 and 3.......... 
80 00 
95 00
        

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