E.. Frankland on the Source of Muscular Power. 399 
‘The value thus —_ is, however, obviously subject to the 
following correctio 
1 € amount of het absorbed by the calorimeter and appa- 
tus aenele’, to be added. 
2. mount of heat carried away by the escaping gases, 
after issuin ng from the w ae to be added. 
ount of heat due to the decomposition of the chlo- 
rate of potash cst eb to be deducted. 
he amount of heat equivalent to the work performed b 
the gases generated in overcoming the pressure of the atmos- 
phere, to be udded. 
Although the errors due to these causes to some extent neu- 
tralize each other, there is still an outstanding balance of suffi- 
cient importance to require that the necessary corrections should 
be mnie! attended to. 
unt of error from the first cause was once for all ex- 
posiiuereaile determined, and was added to the increase of tem- 
perature observed in each experiment. 
The amount of heat carried away by the ei gases after 
issuing from the water may be divided into two items, viz. : 
a. The amount of heat rendered latent by the water which is 
cacsied off by the gases in the form of —— 
The amount of heat carried off by these gases by reason of 
their temperature being above that of the ane from which they 
ue. 
on was ascertained that a stream of dry air when passed through 
the water of the calorimeter, at about the same rate and for the 
same > period of t time as the gaseous products of combustion, de- . 
C. 
neglecte 
' The two remaining corrections can be best considered na 
nee a single careful-determination eliminates both. When 
combustible substance is barnti sce *ygen, the conitons 
