854 



Voltaic Electricity. Section 1: Secondary Cells and Batteries. 



X,,. fill S.VJ 



60 854. 1 : 5. 



60 953 B. 1 : 8 (Ocelli*). 



60 859. 1 : 0. 



60878. 1 : 10. 



60 855. 1 : 0. 



60 953 A. 1:8(6 cells). 



60 953 C. 1 : 8 (6 colls). 



Accumulators and Accessories. 



The use of Accumulators for obtaining a constant and reliable supply of current which 

 is always ready for use cannot be too highly recommended. They are never superfluous 

 in places where a central station is available. The charging of the accumulators is 

 carried out either on any direct current plant, a lamp resistance being in circuit, or by 

 the aid of a switchboard; or supposing that a direct current installation is not available, 

 they can be charged by a thermopile; or, if this is impossible, with 3 or 4 Bunsen cells. 

 If an alternating or a 3-phase current lighting plant is available, it is advisable to employ 

 a rectifier. Precise instructions for the charging and manipulation of the accumulators 

 arc supplied with each battery. As a rule the battery can be set up in the lecture table. 



The mean discharge voltage is about 2 volts per cell. 



The batteries supplied by us are excellent in their action even when not in constant use. Repairs 

 are practically excluded if the batteries are used to some extent in an appropriate manner. 



C.o.sr.i 1 . One each Positive and Negative Accumulator Plate, for demonstration purposes, 



grid plates o. i. o 



60.S53. - - i (1 e in, 0. 5.6 



60,854. -- idem, large-surface plates. Figure (I. (i. 



<;o.x.V>. Demonstration Accumulator, open. Figure, for taking t<> pieces, also suitable for 



practical purposes; capacity on 3-hour discharge, \'2 ampere-hours 0. In. n 



Single Accumulators for School use, Figure, portable, built into glass vessels, with 



terminals. 



Si/e I 

 .Max. charge and discharge current 



Amps. 1.5 



Capacity on 3-hour discharge Amp.-hrs. 4.5 

 ( 'apacit y on 10-hour discharge Amp.-hr. 6.7 



List No. 60,856 

 0. 5. 

 i (I e m, built into ebonite cell. 



List No. 

 



II 



III 



IV 



V 



Cl. .V.'()4..->si|-.'. til 

 Si, mi 



