484 



J. H. van't Hoff on the Origin 



Substance. 



0-02 T 2 

 W * 



Beckmann (found). 



CHCL 



36-6 

 23-7 

 253 

 11-5 

 26-1 

 211 

 5-2 

 167 



37-39 

 23-25 

 25-26 

 11-13 

 27 



20-22 



5-5-6 



16-17 







C H fi O 





(C H-),0 



H 2 



(CHA,CO 





The Lowering of the Freezing-Point. — Similarly, 



0-02 T 2 

 W 



represents the molecular lowering of the freezing-point, and 

 reference may be made to a memoir read before the Swedish 

 Academy, where I first described Avogadro's law for solutions 

 as a " propriete curieuse de la matiere dUnee," along with a 

 confirmation of Baoult's so-called Normal Numbers. 



Substance. 



W. 



T. 



rp2 



Raoult. 



H 2 



79 

 43 

 56 

 29 

 22 



273+ 

 273+17 

 273+ 9 

 273+ 5 

 273+ 5 



19 

 39 

 28 

 53 



70 



28-5 



38-6 



27-7 



50 



70-7 





CH 2 





C B H.N0 9 





Before publishing the above memoir I took the precaution 

 to ask Prof. Petterson if he would determine the latent heat 

 of fusion of ethylene bromide, which I had predicted, from 

 the consideration of Raoult's data, would be 13. This pre- 

 diction was found to be correct, and has since been confirmed 

 in a great many cases, especially by Eykman. 



The following table contains the calculated and found 

 values for the latent heat of fusion : — 



Substance, 



Laurie acid 



Naphthalene 



Phenol 



p-Toluidine .... 

 Diphenylamine 

 Naphthylainine 



Diphenyl 



Azobenzene .... 



Calc. 



Found. 



44 



45 



36 



36 



25 



26 



39 



39 



21 



24 



20 



26 



28 



29 



29 



29 



Substance 



Thymol 



Urethane .. 



N 2 4 



Ida 



ICl/3 



S::= 



Calc. 



Found. 



27 



28 



41 



41 



33 



34 



16 



16 



14 



14 



28 



2- 3 



13 



14-17 



Unfortunately I have no more time at my disposal to follow 

 out all the other relationships which are founded on the 

 assumption that R = 846, so that the following tabular 

 survey must suffice : — 



