558 TRANSACTIONS OF THE AMERICAN INSTITUTE. 



Particulars concerning each Temperature. 



After this, the sun's surface, estimated hy Newton and Buffon. 

 Also the interior of the earth, where all rocks, <fcc., are in a 



[melted condition. 

 Melting point of cerium, titanium, tantalum, rhodium, tungsten. 



do chromium, platinum, iridium, osmium. 



do palladium, uranium, molybdenum. 



do miinganese. 



do cobalt. 



Boiling point of tin. 



do pure bar iron, of nickel. 



Dazzling white heat. 



Melting point of compound of iron, carbon and nitrogen (steel) . 

 Bright ignition. 



Melt point of bright iron, more carbon, andnitro'n (cast-steel) 

 White heat. 



Melting point of pure gold, white cast-iron or iron, more car- 

 [bon, and very little or no nitrogen. 



do white alloy of gold and copper. 



do white iron, still more carbon, and various 



[small quantities of other subs, (grey cast-iron.) 

 Melting point of pure silver. Ignition of aluminium. 



do copper, black cast-iron. 



do common brass, bronze, glucinum. 



do aluminium. Bright yellowish red heat. 



Full red heat. 



Melting point of magnesium. 

 Cherry red. 

 Dull redness. 



Red heat, just visible by daylight. 

 Incipient redness, scarcely visible by daylight. 

 Incipient redness, only visible in the dark. 

 Melting point of barium. 

 Boiling point of sulphur. 

 Melting point of antimony. Volatilization of cadmium. 



do tellurium. 



do zinc. 



Boiling point of mercury, whale oil. 



Melting point of lead, cadmium ; boiling point of sulphuric acid, 

 do amber; boiling point of lin&eed oil, phosphorus. 



Deep blue film produced by tempering steel for watchsprings. 

 Blue film produced by tempering steel for swords. 

 Pink film produced by tempering steel for knives. 

 Steam heated to an expansive force of 50 atmospheres. 

 Meltingpointof bismuth. Steam, &c., 45 atmospheres. 

 Steam heated to an expansive force of 42 atmospheres. 

 Brown yellow film on steel for tempering penknives. Steam 



heated to an expansive force of l!9 atmospheres. 

 Steam at pressure of 34 atmospheres. 



Yellow film for temp'ng chisels. Steam at pressure of 29 atmos. 

 Melting point of tin. Steam at pressure of 24 atmospheres. 

 Straw color for tcmp'g razors. Steam at pressure of 20 atmos. 

 Melting p. of 8 tin, 1 bismuth. Steam at pressure of 16 atmos. 

 Very pale straw yellow for tempering tools for metal. 

 Melting point of lithium. Steam at pressure of 13 atmos. 

 Boiling point of oxalic ether. 



Boiling p. of sol. of nit. amm. Steam at pressure of 10 atmos. 

 Melting point of camphor. 



do 3 tin, 1 lead. Steam at pressure of 8 atmos. 



do 3 tin, 2 lead. 



Boiling point of naphtha. Sulphur ignit. Steam, Ac, 6 atmos. 



do turpentine or sol. of nitrate of lime. 



do chloride of calcium. Steam at pres. of 4atmos. 



Temp'ture at which India rubber and gutta percha vulcanises. 

 Melting point of 1 part bismuth and 1 part tin. 

 Steam with an expansive force of 3 atmospheres. 

 Boiling point of amylic alcohol. Solution of carb. of potash. 

 Melting point of alloy of 5 parts bismuth, 4 tin and 1 lead. 

 Steam with an expansive force of 2 atmospheres. 

 Melting point of etherin. Boiling point of nitric acid. 



do sulphur. Boiling point of hydrochloric acid. 



