340 



APPENDIX. 



TABLE VI. 



TABLE of the Effects of Heat. 



Greatest heat observed 



Hessian crucible fused 



Cast iron thoroughly melted 



Greatest heat of a smith's forge .... 

 " " of a plate-glass furnace . . 

 " " of a flint-glass ditto . . . 



Derby porcelain vitrifies 



Welding heat of iron (greatest) .... 



" " " " (least) 



Fine gold melts 



Fine silver melts 



Swedish copper melts 



Brass melts 



Diamond burns 



Red heat fully visible in daylight . . . 



Iron red-hot in the twilight 



Charcoal burns 



Heat of a common fire 



Iron bright-red in the dark 



Zinc melts (680 Davy) 



Mercury boils (Black 600) (Secondat 644) Petit and 



Dulong) 



" " (Crichton 655) (Irvine 672) (Dalton) . . 

 Lowest ignition of iron in the dark . . . 

 Lead melts (Guy ton and Irvine 594) (Crichton) . . 

 Steel becomes dark blue, verging on black 



" a full blue 



Sulphur burns 



Steel becomes a bright blue 



purple 



u " brown, with purple spots . 



" " brown 



Bismuth melts . . '. 



Steel becomes a full yellow 



" " a pale straw color .... 



Tin melts 



Steel becomes a very faint yellow . . . 

 Tin 3 -f- lead 2 -j- bismuth 1, melts . . . 

 Tin and bismuth, equal parts, melts . . 

 Bismuth 5-j-tin 3 -j- lead 2, melts . . . 



"Water boils (barometer 30 in.) 



Water freezes 



Milk freezes 



Vinegar freezes 



Sea water freezes 



Strong wine freezes . . 



Quicksilver congeals 



Sulphuric aether congeals 



Natural temperature at Hudson's Bay 

 Great artificial cold 





