OF VAPOUl 



B)' another divifion we obtain the ratios for every Jli** ofE 



temperature from 32® to 2 



2°, asunder: 



Force at 32° = 





,200 inch 



J. 485^ 



, m = 





,297 



1. 465 



5-H = 





,435 



I. 45 



65i = 





,630 



1. 44 



77 = 





,910 



1. 43 



88| = 



1 



. 290 



xamination of 

 the progreflion 

 of the force of 



vapour. 



99f = 1. 820 

 il0| = 2. 540 



122 



3. 500 



1331 = 4. 760 



1. 41 



I, 40 



1. 38 



1. 36 



1. 35 



H4i 

 I55f 



167 



6. 450 



1. 33 



8. 550 



1. 32 



11. 250 



178| = 14-. 600 



189^ 



18. 800 



I. 30 



1. 29 



1. 27 



2001 = 24. 000 



212 = 30. 000 



1. 25 J 



Rati 



Thus it appears that a ratio having a uniform decreafe The ratio of 

 nearly takes place ; and we may therefore extend the table fn^the fcTrce of 

 of forces at both extremes, without the aid of experiment, vapour is not as 

 to a confiderable diftance. Thus affumingthe ratios for each r^^ ^^^^j 

 interval of a 11°| below 32° to be, 1.500, 1.515, 1.530,lefs.^" ^ 

 1.545, &c. and for each interval above 212° to be 1.235, 

 1.220, 1.205, 1.190, 1.175, 1.160, 1.145, 1.130, &c. we 

 can extend the table many intervals of temperature, and 

 determine all the intermediate degrees by interpolation , 

 This method may be relied upon as a near approximation j 



3 however 



