196 
PROCEEDINGS OF THE NATURAL [APRIL, '89. 
chemical union of one pound (or kilogram) of Na with 
Cl to form NaCl is 4247 centigrade units; while that of 
carbon (C) with oxygen (0) is about 8000 units. Hence, 
m the combustion of one pound of C heat enough is ob¬ 
tained to reduce nearly two pounds of Na from NaCl if 
heat energy could be utilized without loss. But no 
purely chemical method has even yet been suggested by 
which this kinetic heat energy of the coal or C can be 
ans ormed without loss into potential energy of separa- 
bon of the Na and Cl in NaCl. If electrical energy can be 
pp ie without loss to produce the separation of NaCl 
am + constituent elements, we can easily compute the 
mount of coal used in a steam engine to give the neces- 
produ CtriC Cnergy in the dynamo machine to 
nowei- r n am ° mit ° fNa ‘ Thus °ne mechanical horse 
(pound^ ei " h ° Ur 1S . equivaIent to about 1425 heat units 
caiene“ t0 <™rg y ,a„d thiselectri- 
would g “;.e 
da~o^ pe ) h ° rK —° P iz:rTs n :^ o i 
applied to the V n PractlCe one mechanical horse power 
than 80 to 90 pe^enT^jTo f e . nerally yields not more 
if there were no tr f ^ eCtrical horse power. Thus, 
electric current tl ^ f eS1Stance in the passage of the 
ah the elTvVf t h° Ug ^ m ° Iten NaC1 eletr Jvte, but 
work, from 6 to 7 chan ^ ed into chemical 
the negative electrode in 24 hours'“ W ° Ukl be Set free at 
mica l equivalent of Na is 000 ooo' Again ’ the electroche ' 
ampere of current that gms., i. e . with one 
at the negativel c t ode ° f ^ be d 'P° sited 
would be Iposited i " T ^ SeCOnd of time .8568 gms 
Hence, 178 amperes would fa* ° r 2 °' 56 & ms - m 24 hours. 
° f Na in 24 hours. Since there'are' dCP ° Sit § P ° UndS 
#46 watts to one elec- 
