a-naphthylurethane, m. p. 71 to (eee dormeatis 70 to 71°), from te her, 
phthalic ester acid silver salt, m. p. 127 Be 128° COA ae from: pean 
so re . 
ye eS ae 
Turpentine Oil.—The concern known as the “Naval stores”) . ‘uses s ann | 
more oil of turpentine and resin than the present pinewood resources of America, 6 can 
give without injury, according to the present process of obtaining them. poe 
to Schorger’) 31 per cent. more turpentine oil and 36 per cent. more resin. could. be. 
obtained at each harvest, if the number of “ chippings” per season was doubled. 
Under the “cup and gutter” system now in use, the “chipping” is begun in the spring, 4 
i. @., each week a row of cuts one inch in depth is made in the bark and sap-wood 
we 
> 
on the two inch wide “face’’ with a special hatchet. Whilst the rows ‘were formerly — ee 
half-an-inch from each other, they are now cut at 1/4 in. distances twice a week — a 
according to- Schorger’s process. In this manner the same surface receives” in ‘the ie 
same time double the number of “chippings” as formerly. Pee nr ye j sae 
In this way Schorger obtained after the first year an extra yield of e 450 per 4 
crop (1 crop is the yield of 10000 faces, on. each tree are 2 faces at most). Otherwise — q 
with “narrow chippings” —7. e., the single number of ‘ ‘chippings” were made so closely to a 
— 
a 
~ 
each other that the resin-yielding surfaces only took up half the height— 17.5 per cent. . 
less Pare Hte oil ae resin was obtained than with the usual ‘Procedure. i 
i, 
' 
The Douglas pines—present in- 4 species—belong to the ‘most valuable aha 
most widely distributed pine woods of North West America.- Among them > mal 
gigantic old trees are found, often with twisted trunk, which shows hollows and scars ~ 
filled with pitch a few inches above the ground. According to an American report®), — 
a company—the “Northwestern Turpentine Co.”’—has commenced in a small way to 
collect and work the pitch of these “pitch-trees”. The raw product, which is. forwarded 
to Portland in casks for further manufacture, contains 25 per cent. turpentine oil and - 
70 per cent. colophony. It is hoped that a small quantity of balsam will be obtained. a 
Our last communication 7e rosin- and turpentine-winning in the Punjab ig amplified 
by a report of this industry in the Indian Munitions Board Handbook*). At the present 
time only a Pinus variety, “chir°) of the Himalays”, is tapped, which covers about 
1500 English Square miles in the State forests, and 1800 nit sq. ml. in thie: non- 
growing in Assam and. Burma, and. the yield considerably increased. The F 
Authorities have two factories in Bhiwani hinted Provinces) and in fale ( 
continually increases; the ues rosin industry has now the chance on inc 
leaps and pounds, ae i 
1) Cf. Report 1916, 56. as *) Bulletin No. 567. U.S.A. Department of Agriculture. 
metallurg. Engineering 22 (1920), 853. — +4) Pinus longifolia, Roxb. (Commercial guide to the 
products of India. Calcutta 1912). — °) Probably Pinus excelsa, Wall, known as the” 
meant. — &) Journ. Ind. and Eng. Chemistry 10 (1918), 747. herd 
