— 73 — 



"Black Charcoal" 

 (Produced by the " Inside Kiln Extinction Method ") 



Species 



!■ 



Stewartia pseudo-camellia Max , 



Quercus glauca Thunb 



Quercus serrata Thunb 



lUicium Anisatum L 



Aphananthe aspera Planch 



Clethra barbinervis S. et Z 



Prunus pseudo-cerasus Lindl. var. spontanea Max. 



Osmanthus Aquifolium B. et H , 



Carpinus laxiflora Bl 



Stewartia monadelpha S. et Z 



Fraxinus Bungeana DC. var. pubinervis Wg 



Quercus glandulifera Bl , 



Stjrrax japonica S. et Z 



Cornus macrophylla Wall 



Ilex integra Thunb 



Viburnum dilatatum Thunb , 



Ilex pedunculosa Miq „ .. ., 



Quercus acuta Thunb , 



Diervilla coraeensis DC , 



Magnolia hypoleuca S. et Z , 



Specific 

 gravity 



Kindling 

 point C 



VI. Amount of Heat evolved by Charcoal 



The amount of heat produced by a given fuel greatly differs by the 

 methods of its use. The figures obtained by use of the accurate calori- 

 meter though impracticable in a sence serve, nevertheless, to show the 

 relation existing between the charcoal and the method of production. To 

 this end, both the reduction of led oxide and Thompson's calorimeter 

 were used in determining the temperature of charcoals from different woods. 



(a) Amount of Heat produced by "White Charcoal" 



Species 



Illicium anisatum L 



Quercus mjrrsinaef olia Bl. 

 Vaccinum bracteatum Thunb. 

 Osmanthus Aquifolium B. et H. 

 Magnolia hypoleuca S. et Z. . . 

 Torreya nucifera S. et Z 



Grams of lead 



oxide reduced 



by 1 gram of 



charcoal 



Calorics 



7635 

 7507 

 7460 

 7460 

 7400 

 7330 



