﻿Prof. R. Bunsen's Calcrimeiric Researches. 

 Table VI. 



179 



Substance ex- "1 

 amined J 





Indium 



Indium. 



Kuthe- 

 nium. 



Cal- 

 cium. 



Cal- 

 cium. 



Allo- 



tropic 



tin. 



Cast tin. 



Weight of sub-"l 

 stance j 



G 



11514 



11514 



1-7927 



0-2823 



0-2823 



2-2394 



30017 



Weight of glass \ 

 tube | 



G g 











0-3287 



0-6683 



0-6683 



0-3953 







Weight of plati- \ 

 num sinker ... j 



Op 











0-4239 



0-4239 



0-4239 











Temperature ofl 

 heating j 



t 



99°-82C. 



99°-82C. 



99°-60C. 



99°-78C. 



99°-78C. 



99°-786C. 



99°-606C. 



Duration of ex- \ 

 periraent J 



Scale before ex- 1 

 periment j 



M,-M 



Jfl. 



m 



-0130 



47' 

 -0 063 



106' 

 -0160 



65' 

 -0090 



76' 

 -0052 



66' 

 -0120 



65' 

 0-090 



Scale after ex-1 

 periment J 



Indication of the 1 

 scale J 



Qo-Qi 



-0020 

 100-2 



-0037 

 97*5 



-0110 



276-8 



-0-130 



280-2 



-0076 

 2773 



-016 



296-0 



0-13 

 2521 



Constants 





. W«— 2-745: W -0-4fi92; 



W„,-14-fi57. 







g 





p 









Table VII. 



Elements. 



Specific heat, 

 a. 



Atomic weight. 

 b. 



Atomic heat. 

 axb. 



Ruthenium 



0611 

 01722 

 0-1686 

 00545 

 00559 

 00574 

 00565 



520 

 200 



200 

 58-8 

 58-8 

 37-8 

 37-8 



3-18 

 3-44 

 3-37 

 3-21 

 3-39 

 217 

 2-33 



Calcium 



Calcium 



Allotropic tin 



Cast tin 



Indium 



Indium 





We must make the following remarks with regard to the ma- 

 terials used, and the results obtained, in these experiments. The 

 ruthenium was prepared from the material known as "iron 

 residues " of the St. Petersburg mint, which is perfectly free from 

 osmium. This material was heated with chloride of barium in 

 a current of chlorine, and the grey powder obtained was fused 

 with potash, and a considerable quantity of rutheniate of potash 

 obtained. The oxide prepared from this salt by fractional pre- 

 cipitation with carbonic acid was converted by hydrochloric acid 

 into chloride, the aqueous solution of which was precipitated by 

 hydrogen, and the metal so obtained in the form of shining scales 

 was freed from every trace of oxide by heating it in a current of 

 hydrogen. It was found by testing free from all other platinum- 

 metals. As was to be expected, the specific heat found agrees 



N2 



