8 Large Measuring Instruments, c. 1900-201) Universal-Galvanometer, Siemens & Halske, Ø 10 in. - 2) Amperemeter, Schuckert AG, brass, Ø 6 ¾ in. - ...

2 Resistance Bridges and 2 Laboratory Devices, c. 19201) Measuring bridge by Otto Wolff, Berlin, with 7 rotary knobs. - 2) Measuring bridge by Kei...

6 Galvanometers, c. 19001) Mirror galvanometer, 1897 onwards, no. 48916, manufactured by Siemens & Halske, original lacquered brass, ebonite base,...

4 Measuring Bridges, c. 19201) Ruhstrat A.G., Göttingen, 4 rotary knobs. - 2) W. & J. George Ltd., Birmingham, plug-in bridge. - 3) Unmarked, 6 ro...

5 Large Precision Measuring Instruments, c. 1900-301) Telegraphic galvanometer, made by Telegraph Works, Silvertown, London. No. 179, with plug-in...

7 Measuring Instruments, c. 1900-201) Voltmeter, Schuckert & Co., Nuremberg. Ø 6 ¾ in. - 2) Resistance bridge, Emens Bros. & Co., London. Brass on...

4 Large Precision Measuring Instruments, c. 19101) Resistance bridge by Siemens & Halske, brass, wood and ebonite, small galvanometer, Ø 9 ½ in. -...

4 Large Brass Precision Measuring Instruments, c. 1900-19201) AC voltmeter, AEG, Berlin, Ø 8 ¾ in. - 2) Ohmmeter, Österreichische Schuckert Werke,...

2 Siemens & Halske Precision Instruments1) Universal measuring instrument, for telegraph and telephone line measurements, with crank and plug swit...

3 Measuring Instruments1) Refractometer by Carl Zeiss in Jena, no. 1495, with flowing water temperature control, height 11 ¾ in., with case, c. 19...