18 



C. E. FAWSITT. 



affinity constant of acids, the connection between the 

 property and chemical composition and chemical constitu- 

 tion is so complicated that no definite connection has been 

 established, and indeed the value of the property may first 

 progress in one direction and then in the opposite direction. 



Table IV. 

 Melting Points of the Paraffins. 



Formula 







Difference in 



melting point 



of 



Melting 



Point, 



for addition 



Hydrocarbon. 







of CH 2 



of 2 CH 2 



O9 H 2 o 



-51°C. 









C10H22 





-31°0. 



20 



25 



OllH 2 4 



-26°C. 





5 



19 



C12H26 





-12°C. 



14 



20 



C13H28 



-6°0. 





6 



16 



C14H30 





+ 4°0. 



10 



16 



C15H32 



+ 10°C. 





6 



14 



C 16 H34 





+ 18°0. 



8 



13 



C17H36 



+ 23°C. 





5 



10 



^18^38 





+ 28°C. 



5 



9 



C19H40 



+ 32°C. 





4 



9 



Q20H42 





+ 37°C. 



5 



8 



C2iH 44 



+ 40° C. 





3 



7 



C22H46 





+ 44° C. 



4 



8 



C23H48 



+ 48°C. 





4 



7 



C24H50 





+ 51° 0. 



3 





The building up of compounds from the elements is there- 

 fore not always attended by such a change in the properties 

 as can be predicted; there are evidently here some other 

 factors to be taken account of that are still unknown to us. 



Living Matter. 

 While the creation of atoms of the elements still presents 

 an unsolved problem, the same may also be said of the 

 appearance of life from non-living matter. This question 

 has been a subject of discussion in scientific addresses for 

 many years, but we are still left facing the fact that living 

 matter can only come from living matter. Progress has 

 been made in the artificial generation of the unfertilised 



