842 



Voltaic Electricity. Section 1: Galvanic Sources of Current. 



Xo. 60711 



60711. 1 : 5. 



60719. 1 : G. 



60720. 1 : 3. 



60,711. Quadrant Electrometer (Thomson-Weinhold's), Figure (W. 1). Figs. 499503 i * 1- 

 [472 476]; Gan.-Man., Fig. 649), with replenisher; Maxwell vane (M. P. 10 th edn., IV, 

 1, Fig. 254; 9 th edn., Ill, Fig. 182), all internal parts heavily gilt; with mirror, and 

 arranged for subjective as well as objective reading, with excellent amber insulation IL'. o. o 



(Hi. 7 12. Replenisher (Thomson's), for explaining the mode of action and for practical use, 

 Figure (cf. Fr. phys. Techn. II, 1, Fig. 65) 



Accessories for Quadrant Electrometers Nos. 60710 and 60711. 



60,713. Wall Bracket and Wall Arm" for a paraffin, gas or incandescent lam]) 



1. 4. 



(i. is. o 



lid, 714. Protecting Case for Quadrant Electrometers Nos. lio.710 and 60,711 0.10. 



The protecting case is made of pasteboard covered with calico, ocing suspended from a ceiling 

 pulley. When the electrometer is in use, the case is raised up, and v lien the' electrometer is not in use. 

 the case protects it entirely from dust. The electrometer can thus always maintain one. position. 



Cl. 5255. 33, 



2206, 2214, 220S. 



