1876.] Specific Volumes of Liquids. 293 



dioxide. The liquid commenced to boil at 113°-4 ; the column quickly 

 rose to 113°-5, and then slowly to 113°-55, between which points nearly 

 the entire amount passed over. *=113°-55, n=6°-55, *'=24°-5. Bar. 

 750*8 millims. Corrected boiling-point 113°-50. Corrected and reduced 

 boiling-point 113°-89. 



Its specific gravity at 0°, compared with water at 4°, was found to be 

 2-27875. Other observers have found : — 



Boiling-point. Bar. Sp. gr. compared 



millim. with water at 4° C. 



Pierre* 115-4 753-1 2-26712 



Dumasf 120 767 



Andrews t .... 112-5 752 



Haagen§ 112-0 754-9 2-2328 at 20° = 2-28137 



Two independent series of observations on the rate of expansion of 

 the tin tetrachloride were made. The first series has afforded the 

 formula 



V = l + 0-001 161 138* + 0-000 000 641 935 f 



+ 0-000 000 007 730 07* 3 . . . . (I.) 



The formula given by the second series is 



V= 1 + 0-001 159 962* + 0-000 000 650 399 * 2 



. + 0-000 000 007 724 12 1\ . . (II.) 

 The mean formula is 



V=l + 0-001 160 55* + 0-000 000 646 167 * 2 



+ 0-000 000 007 727 l* 3 , . . (III.) 



by means of which the following Table, showing the volume of tin tetra- 

 chloride at every 10° between 0° and 115°, has been calculated : — 



°c. 



Volume. 



Diff. 



°C. 



Volume. 



Diff. 







100000 





80,. . 



, 110094 



1388 



10 



101168 



1168 



90 



111532 



1438 



20 



102353 



1185 



100 



113024 



1492 



30 



103561 



1208 



110 



114576 



1552 



40 



104795 



1234 



115 



115376 



800 



50 



106061 



1266 









60 



107363 



1302 



113-89 



1-151971 





70 



108706 



1343 









The specific gravity at 113°-89 is 1-97813 ; hence the specific volume is 



259 ^ =131-407 

 1-97813 - 1 ^ 14U/ - 



* Loc. cit. p. 19. t Clarke's Nat. Constants. 



\ Clarke's Nat. Constants. § Pogg. Ann. vol. cxxxi. p. 117. 



II Sn=118-10, Dumas; Cl=35'46, Stas. 



