✍ Scribed by Solomon M. Swab
No coin nor oath required. For personal study only.
hemicelluloses, lignins and resins. The chapter on "Chemical Wood Pulp" pays particular attention to the sulphite, soda and sulphate processes of preparing cellulose and the chief cellulose products; paper, rayon, smokeless powder, lacquers and plastics.
Wood distillation is still an industry of considerable size and results in such important products as rosin, turpentine, pine oil, acetic acid, methyl alcohol acetone, tar and charcoal. The leaching and extraction of certain types of wood provide tannins for the tanning of hides, dyes for cloth, and from western larch: mucic and oxalic acids. A chapter on "Carbohydrates from Wood" makes special mention of maple sugar, gum arabic, the transformation of wood into sugar and the preparation of ethyl (grain) alcohol from sawdust. The utilization of sulphite waste liquor has claimed the attention of many engineers and its possibilities as a cheap source of raw materials has warranted a separate chapter in this report.
A listing of the various Wood Research Laboratories throughout the world is an indication that there is still much to be found out about wood and apparently the author is assured of a steady job in keeping abreast with all the new developments that must emanate from these institutions.
T. K. CLEVELAND.
📜 SIMILAR VOLUMES
## BOOK REVIEWS. 495 This latter process has supplanted all the others in respect to its industrial importance. Following a brief chapter on the history of nitrogen fixation processes which, in addition to the two just mentioned, includes the cyanamide and alkali cyanide methods as well, further