860 



Voltaic Electricity. Section 1: Galvanic Sources of Current. 



Nn. IH023 



New Thermopiles "Heil's Dynaphor", Figure, for working with gas. 



-idem, for working with Spirit. 



Burning spirit of 95% is necessary for working the spirit Dynaphors, this spirit being that generally 

 obtainable. One charge of the basin is sufficient for about 10 hours working. Instructions for starting 

 (this operation being very simple) are appended to each apparatus. 



idem, for working with Paraffin Oil. 



Ordinary lamp oil is used for working above. One filling of the vessel is sufficient for about s. d. 

 10 hours continuous burning. Precise instructions for starting are appended to each apparatus. The 

 paraffin flame, while making a slight amount of noise, burns quite blue and without odour. 



61.048. Gas Pressure Regulator, suitable for all sizes of "Dynaphors" 1. 6.0 



61.049. Relay for putting the Dynaphors in circuit when the necessary charging voltage is 

 available (5 10 minutes after starting up), also for cutting out the cells when the heat 

 supply is stopped 1. 3. o 



61.050. Switchboard for accumulator with 1 supply-point for 20 amperes maximum, Figure 6. 10. 



The switchboard, of polished oak, is fitted with 1 ammeter, 1 voltmeter. 1 current regulator with 

 21 contacts, and with 4 terminals for conducting and taking off the current. The price of the switch- 

 board is increased by 1. 0. if in marble. If desired the switchboard is fitted with a sliding rheostat 

 in place of the current regulator. 



