NO. n 1270. Voltaic Electricity. Section 3: Electro-Magnetic Current Measurements. Tangent Galvanometers. 



871 



61 268. 1 : 6. 



61 269. 1 : 0. 



61270. 1:7. 



Section 3: Electro -Magnetic Current Measurements. 



Tangent Galvanometers. 



The n"i'(llcs. r;i]is and pivots of the galvanometers arc most can-fully constructed and the magnets 

 are very accurately balanced. 



Tangent Galvanometer, F i g u r e (W. D., Fig. 507 [480]), very suitable for school 

 use, noodle with agate cap working on steel pivot: reading facilitated by a mirror; with 

 arrest incut, brass tripod, brass box, copper ring 300 mm diameter. 



Tangent Galvanometer, Figure, needle suspended on raw silk fibre; with air 

 damping; graduation on silvered brass; reading facilitated by an inlaid mirror (Gan.- 

 Rein., Fig. 825) 



61.268. Tangent Galvanometer (Poske's), Figure (Ztschr. f. d. phys. u. chem. U. 3, p. 103), 

 with vortical transparent scale on a 270 mm diameter glass ring, needle resting on pivot 



61.269. Tangent Galvanometer, Figure, with vertical scale for demonstration purposes 

 and with horizontal scale for measurements, with group winding 



61.270. Tangent Galvanometer, student's pattern as suggested by Hahn, Figure (Hahn, 

 Handbuch f. Schuleriibungen, 1909, Fig. 257), with 3 groups of windings (500, 50 and 

 4 turns) 



( '1.2310, 2311, 

 2313. 5813 



2.10.0 



6. 10. 



; 7. 0.0 



!io. o.o 



1. 10.0 



2312, 



