84 



THE GEOLOGIST. 



Bismuth melts at 





centigrade according to 



Guyton 



do. 



ZOO 



Ar^ 



do. 



Ar^ 



do. 



Rudberg 



do. 





A^ 



do. 



A^ 



do. 



Ehrmann 





322^" 



Ar^ 



do. 



A>^ 



do. 



Crichton 



An 



do. 





do. 



do. 



Guyton 



do. 



325° 



do. 



do. 



Rudberg 



do. 



334° 



do. 



do. 



Kupflfer 



Quicksilver boils 



350° 



do. 



do. 



Dulong & Petit 



Zink hardens above 



400° 



do. 



do. 



Rudberg 



Zink melts at < 

 I 



411° 



do. 



do. 



f Daniell, measur- 

 \ ed with an iron 

 rod 



Antimony do. 



512° 



do. 



do. 



Guyton 



Silver melts at / 

 \ 



1023° 



do. 



do. 



r Daniel measured 

 \ with iron rod 



A^ 



do. 



1034° 



do. 



do. 



Guyton do. 



do. 



999° 



do. 



do. 



Prinsep 



9 parts silver, 1 part 











gold 



1048° 



do. 



do. 



do. 



3 do. 1 do. 



1121° 



do. 



do. 



do. 



Copper 1132" C. cor- 

 rected to 



1091° 



do. 



do. 



r Daniel mth pla- 

 1. tinum rod 



do. melts at 



1207° 



Ar^ 



do. 



An 



do. 



Guyton 



do. do. 



1173° 



do. 



do. 



X iattnei 



Gold 1144° corrected 









to 



1102° 



do. 



do. 



Daniel 



do. melts at 



1163° 



do. 



do. 



do. mth iron rod 



do. do. 



1380° 



do. 



do. 



Guyton 



Cast iron 1587° cor- 

 rected to 



{l530° 



do. 



do. 



J Daniel with pla- 

 \ tinum rod 



Platinum 



2534° 



do. 



do. 



Plattner 



MISCELLANEA. 



On the chemical constitution of SiUimanite, 



This mineral is found at Saybrook in Connecticut, and 

 has been described by Mr. Bawen, who has recognized the 

 following constituents. 



