6 Kneciit & Batev, Boiling Points of Aqueous Solutions. 



lytes, and in the iollowing table the results obtained are 

 compared with those of other observers. 



Column A gives the strengtii of the solution in gram 

 molecules per litre. B is the observed rise in temperature, 

 while C is the molecular elevation of the boiling point. 



C= lo . 

 A 



In the remaining columns are given values for C 

 obtained by different observers at approximately the same 

 concentration of solution. 



It will thus be seen that by employing a heating coil 

 with suitable resistance, internal electrical heating can 

 be used for aqueous solutions. 



It possesses the one great advantage over the usual 

 method of heating, in that absolutel}- constant readings 

 are obtained, without any special precautions. 



Where the necessary current and appliances are avail- 

 able, the electrical heating is more convenient than gas 

 heating. 



LITERATURE REFERRED TO IN THE TABLE. 



Kg. = L. Kahlenberg. Jonru. PJiys. Chcm., vol. 5, 

 p. iG6, 1 90 1. 



\V.Bz.=- W. Biltz Zcit. PJiys. C/i., vol. 39, p. 414, 1902. 



S. =A. Smits. „ „ vol. 40, p. 208, 1902. 



L. =W. Landsberger. Zcit. ^iiiorg. 6//., vol, 17, 

 p. 436, 1898. 



Bn, = K. Beckmaini. Zcit.Phys. C7/.,vol. 6, p. 459, 1 890. 



II. Bz. =11. Bikz. " Practical Methods for Determina- 

 tion of i\Iolecular Weights." — Translated 

 by Jones and King. 



h\Kr. = F. Krafft. Ber., vol. 28, pt. 3, p. 2573, 1895. 



Chemical I )c[);irtmcnt, 



Municipal School of Tcclinology, 

 Manchester. 



