; AND .v.i.v aoa 



of w-ivs u. yinggum, 



hut e\ uhtlc agency of ti j'laceailO 



han. U. 



ln>tead ..f .lernal I.- e the 



ciiririit U) 

 from the luit:- -.inp.,-,- 



aMil hydro;:, -||. '1 | ^ctieiatrd ill t he 



ider tli. ftoei by tin- comhustioii of a 



j^iven weight of /JIM: falls >hort of what is prodi. 

 ompo>itinn. HOW far short? Tl. 



admits <.f a perfectly \ac' When the oxygen ami 



lmlm^Mi rrcMiiil>in.-, tin- licaL al)Horhrd in tin- decoinposi- 

 tio!i isarcuratrly r- >|iial inainnmil 



it Iliissiii^ in tlu- kith-rx. \\ . may. if IT 1 1 u-. lx)ttle 

 up the ^jises, carry in this form tin- lu-at of the 

 tlio j . and lihrrah- it t In -iv. 'I'ln- : 



fa.-t, is a hrartli >n which fuel is muMnm-d ; hut th- 

 of tlio comhustioii, in^icad f In-in^ coiitiuctl in the u.-iial 

 manner to the ln-arth it>-lf, may be first liberated at the 



le of the world. 



And here we are aide to solve an enigma which lone 

 pn-plexrd Hcientifir men, and wliich could not be solved 

 until the bearing of the mechanical theory of heat upon 



the phenomena of the voltaic batt*r\ vai undeniood. 



Th.- puzzle was, that a single cell could not d 

 water. I !ain enough. The solution 



of an equivalent of zinc in a single celi 

 much more than half the amount of heat iv^um-d to 

 :iiposo an equivalent of water, and the Mti<;le' cell 

 cannot cede an amount of force which it does not possess. 

 Hut by forming a battery of two cells instead of one, 

 BVelop an amount of heat slightly in excess of that 

 I for t ^position of the water. Th. 



celled battery is therefore rich enough to nay for tl. 



.aintain the exces- ; to within 



vn cells. 



Ml apply to the thermo-olectn. 



instrument usually composed of small bars of bismuth and 

 antimony hoi nat.lv together. The electric cur- 



rent >g the soldered junctions of 



ace of the pile. Like irrent, the ti 



ice decomposition, 



\ dis- 



