184 



Dr. E. J. Mills on Melting-point and 



X. 



y- 



y calc. 



3 



49-32 



49-99 



5 



103 



102-99 



7 



154 



151-19 



9 



195 



195-21 



oc 





1166-79 



The determination of y 7 seems decidedly too high. Methyl- 

 amine, which boils at —20*31, cannot be included in this 

 series. 



20. Chlorides. — The equation to the members #=6, 8, 10 

 of the normal fatty chlorides is 



_ 75-150 Q-3-18) 

 y ~ 1 + -21054 (tf-3-18) ; 



the corresponding boiling-points being 132*98, 179*78, and 

 210*40. When#= oc, y = 356*94. For the odd series, # = 5, 

 7, 9, we have the very similar equation 



_ * 74*099 (#-3*11) 



" 1 + -20816 (#-3*11) ; 



the corresponding boiling-points being 100*51, 159*28, 196*06. 

 When % = oc, y = 355*97 — a number nearly identical with the 

 like value from the even series. It is well known that organic 

 chlorides, especially those in which x is large, distil with some 

 decomposition (and therefore a lower boiling-point) under the 

 ordinary pressure. This property is very beautifully indicated 

 in the values of y a , which are lower by about 14° than they 

 should be on the hypothesis that they are (369°= about) six 

 times the fundamental modulus. 



21. The general results as to boiling-point are comprised in 

 the following table: — 



y- 



Series. 





P. 



1 



Y 



Vex- 



Divisor. 



Quotient. 



Ethines 



Even. 



59638 



5-2110 



310-78 



5 



6216 



Pyridines 



Odd. 



44241 



9-6834 



428-39 



7 



6120 



Pyridines 



Even. 



66-626 



5-5445 



369-41 



6 



61-57 



Monamines ... 



Odd. 



30-367 



38-423 



1166-79 



19 



61-41 



Monamines . . . 



Even. 



30-860 



35-746 



110313 



18 



61-29 



Fatty ketates... 



Even. 



37-262 



18-238 



679-57 



11 



61-78 



Fatty ketates , . . 



Odd. 



29-824 



31-031 



925-46 



15 



61-70 



Fatty alcohols.. 



Even. 



31-813 



17309 



550-34 



9 



61-15 



Fatty alcohols.. 



Odd. 



30-177 



20-451 



61715 



10 



61-72 



Paraffins 



Even. 



39315 



14134 



555-67 



9 



61-74 



Paraffins 



Odd. 



38-992 



j 14172 



552-58 



9 



61-40 



22. According to these results, the value of /3 tends to be 

 about twice that of- ; whereas it will be remembered (§ 12) 



