CATALOGUE. HEAT, CHANGES OF FORM. 



593 



The temperature being/", the comparatire specific gravity is 113456 — (i/+ 101 



60°, 1 — .00058/ — .000000 625/». 



According to Gaussen's comparison of Deluc's experiments, the expansions constitute a 



/+ vh./ '> which becomes nearly .00053/ + .000 000 6001/*. 

 Vitriolic ether .00072 Achard. 



Linseed oil .0009 About 32". Achard. 



Olive oil .0007 About 100°. Achard. 



Deluc found the expansion of olive oil, at 32° to its expansion at 212° as 47 to 54 

 somewhat less difference in proportion. 

 Gases. 

 Dry air, i.at 32» 



or reckoning the degrees front 



series, varying nearly as 



in middle temperatures there was 



Mean of 6. LacaiUe giving .04, Mayer .046, 



Bonne .0477, Shuckburgh .0505, Bradley 



0544, and Deluc .047, for the expansion. 



From 32° to 54.8° : the mean .0476. Deluc. 



Mayer's refractions. Gilbert. 



l.ambert. ' 



Deluc, reduced by Gilbert. 

 LuE. 



About 95°. Luz. 

 About 172°. Luz. 

 Roy : but moisture was admitted. 

 Schmidt: thinks it perfectly uniform, becom- 

 ing .7 at 392°. 

 Laplace. Syst. du monde. 

 Gay Lussac, corrected for the expansion of 



glass, =: .003 or .003 5. 

 Dalti n, reduced by Gilbert. 

 About 95°. Dalton. 



About 172°. Dalton. 



Air, 2^ times as dense as usual (.434) (.00241) Roy. 



Moist air, as dry air. When additional moisture is excluded. Saussure. 



Hydrogen gas. ' 



Oxygen gas. 



Azotic gas. 



Carbonic acid gas. 



Muriatic acid gas. 



Sulfureous gas. 



Nitrous gas. 



VaiJour of sulfuric ether All as lif. Gay Lussac, and Dalton. 



The inequality of the mercurial scale, as observed by Deluc, is more than equivalent to the inequality of the expansion 

 «f air, as observed by Luz, but only half as much as that which is assigned by Dalton. 



Robins found that air was expanded by a red heat to 4 timet iU bulk. This would indicate, according to Schmidt, a 

 temperature of about 1580°. 



TOL. II. 



3 X 



