of various Vegetable and Animal Suh stances. 5 



Welded mass of the same shape' w'y\h the interior of the re- 

 tort. Each grain of barley preserved its' original form, but 

 firmly welded to each other by a porous cement of silvery- 

 coloured coal, which in some places was prismatic. — It 

 weighed 38 grains. Loss in distillation 162 grains. 

 Component parts : Volatile matter 81 

 Oxide of carbon 19 



100 parts. 



Experiment VIT. 

 Eggs. — An egg was boiled hard and the shell taken off, 

 the core was then allowed to dry till it had attained the con- 

 sistency of a horse's hoof, which it greatly resembled. In this 

 state it was found to weigh 333 grains. In distillation it 

 yielded a great quantity of white flame of a dazzling colour. 

 The residuum had passed by fusion into a silvery bright po- 

 rous coal that weighed 21 grains. Loss by distillation 312 

 grains. 



Component parts : Volatile matter 93-7 

 Oxide of carbon 6*3 



100 parts. 



Experiment VIII. 

 Goose Feathers, 107 grains. — This substance in distilling 

 yielded at first a heavy smoke, which was afterwards suc- 

 ceeded by a pale blue flame. The residuum coal was un- 

 commonly light and spongy. It had caked into one mass 

 during the exposure, and now weighed 1 1 grains, having lost 

 in distillation 96 grains. 



Component parts : Volatile matter 90 

 Oxide of carbon 10 



100 parts. 



Experiment IX. 

 Cork, in small pieces, 200 grains. — These united together 

 and swelled into three times their original volume, similar 

 to a caking coal. The charcoal obtained from this sub- 

 stance, when pounded, was nearly ten times the bulk of 



A3 common 



