802 



Static Electricity. 



No. 60 196 



60 200. 1 : 4. 



60 201. 1 : 5. 



60200a. 1:3. 



60 200 b. 1:3. 



60 202. 1 : 6. 



60 196. 1 : 4. 



60 203. 1 : 6. 



60 205. 1 : 6. 



60.196. Aluminium Electrometer (Kolbe's), Figure (Kolbe-Skellon, Introduction to Electri- s. d. 

 city, Parti, Fig. 15) similar to Gan.-Man., Fig. 659, with projection scale for calibrating 



and amber tubes in ebonite plug, one ball 10 mm diameter, two condenser plates 

 (lacquered) with one ebonite handle, one extra ebonite plug with amber tubes, con- 

 ductor rod and paper leaves 3. o. 



The sheet iron house of the instrument is 130 mm high, 140 mm wide, 95 mm deep. 



60.197. Projection Grade Scale, for inserting in above, divided on mica 0. <>. o 



60.198. 2 Sheet Metal Pieces with C-shaped pieces cut away, for quantitative experiments 0. 4. 



60.199. Hollow Ball, for screwing on, 50 mm diameter, and 2 insulated test balls for graduating 0. 6. 



60.200. Testing Electroscope (Kolbe's), Figure (Kolbe-Skellon, Introduction to Electricity, 



Part II, Fig. 79) [ 0. 6. 



60,200 a. Auxiliary Electroscope (Kolbe's), Figure (Kolbe-Skellon, Introduction to Electri- 

 city, Part II, Fig. 109) 0. 3. 



60,200 b. Testing Electroscope with long insulated metal handle, Figure 0. 3. 



60.201. Insulated Wire Fork, as suggested by Kolbe, Figure (Kolbe-Skellon, Introduction 



to Electricity, Part II, Fig. 81) 0.18.0 



60.202. Aluminium Leaf Electrometer (Grimsehl's) (Ztschr. f. d. phys. u. chem. U. 16, p. 5), 

 suitable for projection, Figure 3.10.0 



Tnis electrometer is extremely sensitive. An extra ebonite plug, in two parts, and a clamping 

 screw for inserting are given in with the instrument. 



Tne instrument is built into a brass case and possesses a graduation, going up to 30, on a mica 

 disc. Glass windows fitted in front and behind render it possible to employ the instrument in con- 

 junction with the projection apparatus. 



An adjustable discharging electrode serves both for arresting and for increasing the sensitivity 

 of the instrument. 



Cl. 3454. 4977, 

 390. 572li. 5711, 3812, 

 3813, 3X11. 



