88 Mr. C. Tomlinson on some Phenomena 



Bath 195° F. Spirit 148° F. 

 192 148 



188 148 



186 150 



Weight of distillate in five minutes 194 grains. 



Second operation. — After an interval of five minutes a fresh 

 charge of wood-spirit was introduced into the retort. The char- 

 coal was not fully active until the spirit was near its boiling- 

 point ; it then became very active. 



Bath 195° Spirit 1481° 



192 150 



190 151 



Weight of distillate in five minutes 192 grains. 



Third operation. — After five minutes with a fresh charge. The 

 charcoal became active at 140°. 



Bath 196° Spirit 148° 



194 148 



192 148 



Weight of distillate in five minutes 212 grains. 



Fourth operation. — After five minutes with a fresh charge. 

 The charcoal became active at 148°. 



Bath 198° Spirit 148° 



194 150 



192 150 

 190 149J 



Weight of distillate in five minutes 208 grains. 



Fifth operation. — After an hour with a fresh charge. The 

 charcoal which had remained in the spirit during the hour's in- 

 terval became active at 140°. 



Bath 202° Spirit 148° 



196 150 



194 151 



Weight of distillate in five minutes 182 grains. 



Sixth operation. — After twenty-three hours, during which the 

 charcoal was left in the spirit in the retort. It became active at 

 148°. 



Bath 196° Spirit 151° 



193 152 

 190 153 



Weight of distillate in five minutes 216 grains. 



Seventh operation. — After an interval of twenty-four hours, 

 during which the charcoal had been left in the spirit. In this 

 operation the charcoal did not become active until the spirit had 



