886 Mr. Wilson Taylor on the Coalescence of 



closely approximating the true value from data experi- 

 mentally determined in connexion with water, we are led 

 to think that the same value of N would be obtained from 

 similar data in connexion with other substances which are 

 chemically stable under the conditions involved in the 

 determination of these data, though not to the same degree 

 of approximation. 



In the Tables II. and III. below are given the values of 

 T m .-aid N as calculated along with the necessary data for ten 

 of the more common substances, including water. L is the 

 he;it energy exclusive of that required for the external 

 work necessary to vaporize a gram mass of the liquid at the 

 boiling-point without change of temperature under atmo- 

 spheric pressure. 



Substance. Formula. 



Water H 2 



Propyl alcohol... C 3 H K 



Ethyl alcohol ... C 2 H 6 



Methyl alcohol... 0H 4 O 



Ether O 4 H i0 O 



Chloroform ...... CHC1, 



Nitrogen N 2 



Oxygen 2 



Benzene C 6 H G 



Mercury Hg 



Substance. Boil. Pt. 



o 



Water 373 



Propyl alcohol... 370'2 



Ethyl alcohol ... 351-3 



Methyl alcohol... 337'7 



Ether 307'6 



Chloroform 334- 2 



Nitrogen 77 



Oxygen 90 



Benzene 353 2 



Mercury 6297 



Table II. 









m. 



Qc°. 



0°. IV 



T " 



- B0. 



18 



638 



288 73-3 



133-6- 



-•2090 



60 



536'7 



288-4 23-8 



49-5- 



-•09250 



46 



516-1 



293 22 



509- 



- -09860 



32 



513 



293 23 



53-6- 



-•1050 



74 



466-8 



293 16-5 



44-3- 



-•0950 



1194 



533 



288 27-2 



59-3- 



-•1110 



28 



127 



77 8-5 



21-6- 



-•1700 



32 



155 



90 13-1 



30-4- 



-•1970 



78 



561-5 



290-5 29-2 



600- 



-•1070 



200 



(1734)* 



290-5 547 



657 - 



-•3790' 



* Theoretical. 









Table III. 









e. 



pe- 



T?»=T . 



L. 



N/10 23 . 







277 



1000 



133-6 



498 



605 



293 



•804 



49 5 



152 



728 



288 



•794 



50-9 



192 



1009 



288 



•796 



53-6 



246 



1268 



290 



•718 



44-3 



73-4 



113 



273 



1-526 



593 



52-4 



1-24 



77 



•79 



21-6 



41-0 



•79 



38 



1-27 



30-4 



47-5 



1-28 



378-4 



•879 



60-0 



86-5 



1-19 







(14-25) 



657 



61-6 



•21 



