834 



When our results are compared with the values referring to the 

 spec. gr. of absolute alcohol in the literature after 1860, the obser- 

 vations before 1889 (introduction of the international hydrogen scale 

 for the temperature) must be recalculated for the temperature and 

 the observation of MKNnKi.KJFFF (1869) also for the erroneous 

 specific gravity of water used by him, viz. 0,99918 at 15° (accord- 

 ing to Kopp). We then tind: 



Observer 



Observation 



15 

 sp.gr. -J- (1.1.) on inter- 

 national hydrogen scale 



1911 



1860 VON Baumhauer 



1869 Mendelejeff 



1884 Bureau des P. et M. 



1887 Mendelejeff 



1901 Cook 



1904 MORLEV 



1904 Crismer 



1905 Winkler 



1906 Klason and Norlin 

 1906 I „ „ „ 

 1908 Andrews 



1910 Agree 



1911 Kailan 



Osborne and Mc Kelvv 



sp-gr. 'ƒ (1.1.) 0.79415 

 spgr-Y O') 0.79367 

 sp.gr. [^ (1.1.) 0.79433 

 sp.gr. ^ (1.1.) 0.79363 



sp.gr. ^^ (1.1.) 0.79357 

 calcul. from Mendelejeff 

 sp.gr. '^^ (1.1.) 0.79366 



sp.gr. ^ (1.1.) 0.79363 



sp.gr. -^^ (1.1.) 0.79792 j 



spgr.^ (1.1.) 0.78938 \ 



sp.gr. ^ (1.1.) 0.78510 



sp.gr.— (1.1.) 0.78507 



25 

 sp.gr. ^ (1.1.) 0.78513 



sp.gr. ^ (1.1.) 0.79360 



0.794085 



0.793572 



0.79359 



0.793565 



0.79357 

 0.79357 

 0.79366 



0.79363 



0.79365 



0.79355 

 0.79352 

 0.79358 

 0.79360 



When we leave the first observation out of account, the mean of 

 the others becomes 0,79359, which is in good harmony with our 

 observation. Absolute alcohol is (besides water and the aqueous 

 solutions of some salts and of cane sugar) perhaps the only liquid 



