PACIFIl l MONTHLY. 



Heat 



mi, B a 

 The ok) theory that beat ii a sob- 

 the atoms of 

 n abandoned, pari'.', i 

 it could not explain certain 

 ir example, the production 

 t by friction i 



has been proposed which has explained 



ir, and the mind i 

 in it, .«i in the Copernican iheory of 

 ■m. liut the phi 

 . of tin- former theory lias been 

 i . particularly the term 

 icity lor heat," since water has 

 icily" to store away 30 timi 

 much be ■ nrj has, wh 1 1 



the theory; and of course In cooling, 

 gives oft nidi heal 



an tin* lame amount of mercury. 



in be a sub- 

 stance, we ha\ • know that it 

 nply "ii vibratory motion of the 

 ultimate particles of matter," as sound 

 ■ v motion of the string, the 

 bell, the vocal organs, which 

 pre! und The analogy of 

 the B i ong presump- 

 in favor of such a theory; for in 

 ili* - tuch and taste thi 

 ■ a in the • 

 uell Miii-' contract with 

 given off from the odorous 

 body . but in round, which alios 

 jible distance of twenty miles there 



ontract, only vibratioi 

 n heal ami lighi com s from the 

 sun and from the distant 

 might >\ | ition, instead ■ 



ct with particles given off. 

 In the process of combustion a 

 1 with phorphorus and 

 other sul hich burn at i 



low temperal hted by thi 



produced by friction, then, as in the 

 candle, the heal whioh slowly melts 



low, which in raise. 1 to the tlamc 



plllary attraction ; ami then the 

 atoms of carbon in the heated tallow 



clash with atoms of oxygen in the sur- 

 rounding air ami the motion of trans- 

 lation is changed to vibration, which 



is heat. Of COUrM the power which 



the atoms of carbon and ox 

 together is not gravitation hut chemi- 

 cal a.-tion, a force indefinitely greater, 

 The slowness of combustion is because 

 onlv a few of I mi can I 



itherat the tame time, while in 

 June, powder, and other explosives, 

 there is a previous mixing of the at 

 in proper proportions, ready t" i 

 when the spark is given. 



We talk ahout the power of steam; 

 hut .team is only a convenient lever; 

 the power all comes from thi 

 muscular powi from the 



digested — burned — in the stomach ; 

 for the stomach of every animal Is a 

 furnace, ami the heat of the furnace 

 produces mechanical force, whether in 

 the locomotive -ir In the animal ; and 

 heat and mechanical fore- n re conver- 

 tible each into the other ami hack 

 again, without actual los*. Ami thin 

 is analogous with what we see around 

 u*. There it change every where, but 

 nothing goes out of existence tee 

 mes water ; watei steam, and even 

 hydrogen and oxygen ; the form and 

 qualilii - I atly change, hut not 



iiom of the in ■ It ; ami all 



may bi changed hark ngsiin into water. 



■••at in the locomotive is chs 

 into the forward motion • f the train, 

 and this sgain into heal when the 

 brske" are put on ;and mi the 



friction of the axle-, tl 

 the air. and the heal pi stop- 



pinga train would -tart it again to the 



