12 



Professor Gordon on the Melting Points of Metals. 



Temperature necessary for the Formation of different Silicates, was 

 promised, should the society consider it of sufficient interest, as the 

 subject of a future communication. 



TABLE I. 



TABULAR TIBW OF THE MELTING POINTS OF METALS, AS DETERMINED BY DIFFERENT 

 EXPERIMENTERS. 



lln melts at 

 Do. do. 

 Do. do. 

 Do. do. 

 Do. do. 

 Bismuth do. 

 Do. do. 

 Do. 

 Do. 

 Lead 

 Do. 

 Do. 

 Do. 



do. . . . 



do., . . 



do. . . . 



do. . . . 



do. . . . 



do. . . . 

 Quicksilver boils at 

 Zinc hardens above 



228° Centigrade 



267° 



228° 



230° 



222-5° 



246° 

 241° 

 265° 

 264° 



322i° 



322-2° 



325° 



334° 



350° Centigrad 



400° 



Do. melts at 



Antimony do 



Silver melts at 



Do. do 



Do. do 



9 parts silver 1 part gold do. 



3 do. 1 do. do. 



CJopper 1132° C. corrected to 



Do. melts at .... 



Do. do 



Gold, 1144° corrected to . 



Do. melts at 



Do. do 



Cast Iron, 1587° corrected to 

 Platinum melts at . . . 



411° 



512° 



1023° 



1034° 

 999'' 

 1048° 

 1121° 

 1091° 

 1207° 

 1173° 

 1102° 

 1163° 

 1380° 

 1530° 

 2534" 



according to Crichton. 



Guyton. 



Rudberg. 



Kupffer. 



Ehrmann. 



Crichton. 



Guyton. 



Rudberg. 



Ehrmann. 



Crichton. 



Guyton. 



Rudberg. 



Kupffer. 



e, according to Dulong and Petit. 

 Rudberg. 



f Daniell, measured with an 



I Iron Rod. 



Guyton. 



J Daniell, measured with 



\ Iron Rod. 



Guyton. 



Prinsep. 



do. 

 do. 



Danielljwith Platinum rod. 



Guyton. 



Plattner. 



Daniell. 



Do. with Iron Rod. 



Guyton. 



Daniell, with Platinum rod. 



Plattner. 



TABLE IL 



MELTING POINTS OF VARIOUS HETALLURGIC PRODUCTS. 



100 by weight of this substance 



Name of the substance, the melting point melt in the same temperature 



of which is determined. and in the same time to a 



globule as alloys of 



1. Sulphuretted metals, from process termed ) „„ ^ , , _„ „., 



RoharbeU, } 30 Gold, + 70 Silver 



2. Do. Lead process, 5 — +95 — 



3. Do. Copper do., 3 Lead, + 97 — 



4. Aseniuretted Metals,— Lead, 50 Gold, + 50 — 



5. Raw Copper, 5 — + 95 — 



6. Red Litharge, 90 Silver, + 10 Lead, 



7. Slags :— 



a. Greenish yellow colour, and slight glass ) ,c t>i *• itji 



vitreous lustre \^^o^^> + 16 Platmum, = 1331 



Melting 

 point, 

 deduced 

 by cal- 

 culation. 



= 1047°C. 



= 1027° 



= 1002° 



= 1062° 



= 1027° 



= 954° 



