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/lit13655/7/
6 
JAMES G. BIDDLE, DREXEL BUILDING, PHILADELPHIA. 
Laboratory Reading Telescopes. 
B1074. 
These Telescopes have been recently designed to fill the demand for an 
optically good instrument, simple in its adjustment, capable of giving good 
results even for the most exact purposes, and at a reasonable price. The 
clearness and definition in every case will be found very perfect. 
B1073. Student’s Reading Telescope.......Grade B $15 00 
Has altitude and azimuth adjustments and lateral rack and pinion adjust¬ 
ments of scale; aperture 15 mm; magnifying power, 12 to 15. Reads down 
to 60 cms distance from galvanometer. Of metal throughout. Complete 
with 50 cm scale. 
B1074. “Universal” Reading Telescope..........I25 00 
Constructed of brass ; lacquered throughout, except base, which is 
japanned. Adjustments for altitude and azimuth, vertical rise and fall of 
scale, rack and pinion adjustment of telescope, and independent movement 
of eye-piece to secure distinct focus of cross hairs. Magnifying power 20 ; 
aperture 25 mm. Complete with 50 cm scale. 
B1075. Same as B1074, but without rack and pinion draw, Grade B 20 00 
Bio75><. Unmounted Reading Telescope.......... 6 00 
As furnished with Rowland D’Arsonval Galvanometer B1040, but without 
support of any kind.
        

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