334 Mr. Gervaise Le Bas on 



VII. — Table illustrating the Law o£ Coincident States. 

 Values of dJd T '. 



M.P.+»xlO. 



C 12 H 26 . 



C 13 H 23 . 



C U H 30- 



C 15^32« 



C 16 H 34- 



CitH 36 . 



CiAs- 



M.P 



1 -oooo 



0-9913 



1-0000 

 09909 



1-0000 

 0-9910 



1-0000 

 0-9911 



1-0000 

 0-9913 



1-0000 

 0-9911 



1-0000 

 09910 



„ +-10° ... 



„ +20 ... 



0-9824 



0-9819 



0-9820 



0-9822 



0-9826 



0-9822 



0-9821 



„ +30 ... 



0-9735 



0-9728 



0-9730 



09732 



09738 



0-9733 



0-9732 



„ +40 ... 



09644 



0-9637 



0-9639 



0-9643 



0-9650 



0-9645 



0-9645 



„ +50 ... 



09552 



0-9546 



0-9550 



0-9553 



09561 



0-9558 



0-9560 



„ +60 ... 



0-9459 



0-9453 



0-9458 



0-9463 



0-9471 



0-9471 



0-9474 



„ +70 ... 



9368 



0-9362 



0-9367 



09372 



0-9381 



0-9385 



0-9390 



„ +80 ... 



0-9270 



9270 



0-9275 



0-9282 



0-9291 







„ +90 ... 



0-9172 



0-9177 



0-9184 











The subjoined table further demonstrates the validity of the 

 law o£ corresponding states under the above conditions: — 



VIII. — Table illustrating the Law o£ Corresponding States. 



T. 



V. of 



C U H 30- 



Eatio. 



V. of 

 C 15 H 32; 



Eatio. 



V. of 



C 16 H 34- 



Eatio. 



V. of 



C 17 H 3G- 



Eatio. 



M.P. ... 



255-4 



2732 





291-2 





309-0 









1027 





1-027 





1-028 





1-028 



„ +30°. 



262-45 



1-057 



280-8 



1-057 1 



299-34 



1-056 



317-54 



1-056 



„ +60°. 



270-01 





288-94 





307-73 





326-31 





It is concluded from the above table 



That the molecular volumes of the complex liquid normal 

 paraffins at equal intervals of temperature from their respective 

 melting-points are equal multiples of their respective volumes at 

 those points. 



The conditions for the validity of the laws of additivity and 

 correspondence are seen to be represented by intervals of 

 temperature from certain fixed or reference points, and not 

 by equal ratios thereof. 



The evidence of the above tables is strongly in favour 

 of the view that the laws of additivity and corresponding- 

 states are intimately connected. An investigation of the 

 volumes of the liquid normal paraffins shows that, when 

 the law of additivity is strictly true, the law of corresponding 

 states is also true. 



The melting-points of the above compounds have been shown 

 to he nearly equal fractions of their respective boiling-points, 

 and thus of their critical points. It is true that the boiling- 

 point is not a strictly corresponding temperature ; but the 

 fractions made by the B.P/s of the simpler paraffins with 



