NEW FORM OF GAS BATTERY. 



299 



purpose \ there is, however, a form of gas battery which I 

 may here describe, which, where continuous intensity or electro- 

 motive force is required, but the quantity of electricity is 

 altogether unimportant, appears to me to offer some advan- 

 tages over any form of battery hitherto constructed, and which, 

 independently of any practical result, is, from circumstances 

 peculiar to the gas battery, not without interest. It is shown 

 at figs. 4 and 5. A A' is a long glass tube, with a series of legs 

 or glass tubes attached to and opening into it ; the lower 

 extremities of these are open, and the main tube or channel 



Fig. 5- 



A A' terminates at the extremity A in a glass stopper, and at 

 A' opens out into a funnel, as shown in the figure. Into a 

 series of glasses B B' are cemented platinum wires having 

 attached to them strips of platinised platinum foil, two to each 

 glass, the one being four inches long and half an inch wide, 

 the other \\ inch long by one inch wide ; the former set are 

 placed lower than the latter, so that when the glasses are filled 

 with liquid the former set shall be just covered, and the latter 

 bisected by the water-mark ; the last glass B' has no platinum. 

 These platinum strips are connected metallically by external 

 wires, the narrow platinum of one cell with the wide one of the 

 next, and so on in series. The glasses having been filled to 

 the top of the narrow platinum with acidulated water, let a 

 piece of zinc be placed on a pedestal in the vessel B', and the 

 stopper being out of the extremity A, the apparatus A A 7 

 lowered into the glasses, the tubular legs covering each one of 



