(JO 



THE NATURE AND 



[SECT. ii. 



liquids. It may be proper to observe, that the various thermometers used in these 

 experiments were duly adjusted to a good standard one. 



After repeated experiments by all these methods, and a careful comparison of 

 the results, he was enabled to digest a table of the force of steam from water of all 

 the temperatures from 32 to 212V The only experimental results were the fol- 

 lowing, which are compared with our formula. 



DALTON'S EXPERIMENTS ON THE FORCE OF STEAM. 



From these results he determined the ratio belonging to each interval, and filled in 

 the intermediate degrees by interpolation, considering the forces to increase in a 

 geometrical progression. Above 212 he made no trials at that period, though the 

 table was extended to 325, and has since been found to be erroneous for the 

 temperatures above 212. 



97. Mr. Dalton afterwards re-examined the subject, and considers from va- 

 rious trials, that the force of steam at 32 cannot be less than - 2 of an inch ; and 

 is most probably 0*25 : but with the advantage of having seen the results of 

 Dr. Ure's and Mr. Southern's experiments, and having made new experiments 

 himself for the temperatures between 212 and 300, he gives the following table, 

 formed from what he considers the most correct experiments on the subject. 2 



i Nich. Phil. Journal, vol. vi. p. 263. 8vo. 



- Annals of Philosophy, vol. xv. p. 130. for 1820. 



