6297. 
6298. 
6299. 
6300. 
6301. 
6302. 
6393. 
6304. 
6305. 
6306. 
6307. 
6308. 
6309. 
6310. 
6311. 
6312. 
6313. 
6314. 
6315. 
( 287 ) 
Siam Catechu, or cutch.—An extract prepared by boiling in water the heart- 
wood of Areca Catechu (L.f.) Willd. (Palmae—Palm Family). Native 
of tropical Asia. Presented by Parke, Davis & Company. 
Another sample of the same. Presented by H. H. Rusby. 
Quebracho extract.—An extract obtained by boiling in water the wood and 
bark of Quebrachia Lorentzii (Griseb.) Engler, and other species of Quebrachia 
(Anacardiaceae—Sumac Family). Native of Argentine and adjacent 
regions. Presented by H. H. Rusby. 
Manna, in sorts.—An inferior grade of the sugary exudation obtained by 
incising the bark of Fraxinus Ornus L. (Oleaceae—Olive Family). Native 
of southern Europe and cultivated. Presented by H. H. Rusby. 
Crude gambir. Pale Catechu.u—The crude extract made by boiling in 
water the leafy twigs of Ourouparia Gambier (Roxb.) Baill. (Rubiaceae— 
Madder Family). Native of tropical Asia and cultivated. Presented 
by H. H. Rusby. 
Kavi extract.—Another form of the same. From Siam, through the Field 
Museum of Natural History. 
Cube gambir. Khan. Siet-thet—A superior grade of the preceding, 
produced in British India and cut into small cubes. Presented by H. H. 
Rusby. 
Japanese agar-agar—A gum-like product extracted from the plants of 
species of Eucheuma, Gelidium, and other seaweeds. Native of the 
ocean of eastern Asia. Presented by Lehn & Fink. 
Another sample of the same. Presented by Merck & Company. 
Raw linseed oil (See No. 1648). Presented by the National Lead Com- 
pany. 
American linseed oil—The preceding oil expressed from American-grown 
flax-seed. Same donor. 
Refined linseed oil.—The same, freed from its impurities. Same donor. 
“AA” linseed oil.—A highly purified grade of the same. Same donor. 
Boiled linseed oil_—The same oil, improved for use by boiling. Same donor. 
Refined castor oil. Oleum Ricini—The highly purified fixed or fatty oil 
expressed from the ripe seeds of Ricinus communis L. (See No. 1656). 
Presented by Baker & Company, of New York. 
Croton oil. Oleum Tiglii (See No. 1663). 
Refined olive, or sweet, oil. Oleum Olivae.—The highly refined oil expressed 
from ripe olives (See No. 1696). 
Crude camphor.—An aromatic substance obtained by distillation with steam 
from the wood of the root and portions of the trunk of Cinnamomum 
Camphora (Nees) Engler (Lauraceae—Laurel Family). Native of 
eastern Asia, on the mainland and islands. The specimen shows the form of 
tub in which the crude camphor is imported. Presented by Baker & 
Company, of New York City. 
Refined camphor.—The preceding substance, refined by redistillation. 
Same donor. 
