(i.) Dried between 200° and 212° for twenty hours, lost 12.5 per cent.
(ii.) Part of the former, dried between 300° and 350° for six hours, lost 2.3 per cent.
(iii.) Dried as (i.), lost 15 percent.
(iv.) Part of the last, heated to 212° for six hours longer, lost 3.2 per cent. more.
LIGNIN, or WOODY FIBRE,
Obtained by rasping wood, and then pulverising it in a mortar; boiling the impalpable powder in water till nothing more was [p482] removed, then in alcohol; again in water, and dried in the air till they ceased to lose weight.
| Carbon. | Water. | ||
|---|---|---|---|
| From box | 42.7 | 57.3 | |
| " | dried (i.) | 50. | 50. |
| From willow | 42.6 | 57.4 | |
| " | dried (i.) | 49.8 | 50.2 |
(i.) Dried at 212° for six hours, afterwards between 300° and 350° for six hours. That from box lost 14.6, that from willow 14.4 per cent.
| Acetic acid | 47.05 | 52.95 | |
| Sugar of milk | 40. | 60. | |
| Manna sugar | 38.7 | 61.3 | |
| Gum arabic | 36.3 | 63.7 | |
| " | dried (i.) | 41.4 | 58.6 |
(i.) Dried between 200° and 212° for twenty hours, lost 12.4 per cent. The same gum further heated to between 300° and 350° for six hours, lost only 2.6 per cent., and had become deep brown.