TABLE XXII. 



FOR SHOWING THE DIFFERENCES IN THE VALUES OF THE ELASTIC FORCE OF 

 AQUEOUS VAPOR ADOPTED BY DIFFERENT AUTHORITIES. 



The following synoptic view of the values of the elastic force of vapor adopted by- 

 various authorities, furnishes the means of readily comparing them, and of appreci- 

 ating the amount of the differences which they exhibit. The values are given both 

 in English and in French measures. 



Dalton's values are copied from the Edinburgh Encyclopedia, Art. Hygrometry. 

 Those adopted in the Greenwich Observations are found in the same article, and also 

 in the volumes published annually by that Observatory. Biot's table of tensions is, 

 in fact, the same, computed by Pouillet from Dalton's results, by Biot's formula, and 

 published in Biot's Traite de Physique., Tom. I. p. 531. Dr. Ure's results are taken 

 from his Memoir in the Philosophical Transactions for 1818, p. 347. In the column 

 headed " Daniell " are given the forces of vapor as found in the table published in his 

 Meteorological Essays, 2d edition, p. 596, a table computed by Galbraith, from Dr. 

 Ure's experiments, by the formula of Ivory. 



For the columns headed Royal Society, August, Kaemtz, Magnus, and Regnault, 

 see above, p, 147. 



B 152 



