142 ROYAL SOCIETY OF CANADA 
The value of the mean specific heat obtained by Reynolds and Moorby 
is 41832. The value obtained by the author, using the continuous-flow 
method of electric calorimetry is 41883, in terms of the Clark cell 
value 1:4342 volts, or 4:1891 in terms of Griffiths unit. These values 
in terms of the Clark cell value 1-43325, which is equal to the abso- 
lute value obtained by Carhart,’ are 4:1828 and 4.1836. 
Since Reynolds and Moorby’s absolute value, measured mechan- 
ically, is between these and equal to Rowland’s value at the same 
temperature to within 1 in 1000, which was the limit of accuracy of 
Rowland’s work, the evidence seems to point to a value of J equal to 
41832 X 107 ergs. 
as being correct. 
In gavitation units this becomes 
426-60 kilogrammetres. 
for latitude 45 and sea level taking Helmert’s value of g equal to 
980-5966,” or, 
777-58 foot-pounds. 
in the English units. 
1 Physical Review, 9, 288 (1899). 
? Landolt and Bornstein’s Tables. 
