2497- 
2498. 
2499. 
2500. 
2501. 
2502. 
2503. 
2504. 
2505. 
2500. 
2407. 
2408. 
2409. 
2510. 
BET Ts 
2512. 
2513. 
2514. 
2515. 
2516. 
2517. 
2518. 
2519. 
2520. 
2521. 
2522. 
2523. 
(113 ) 
Black oak bark.—The bark of Quercus velutina Lam. (Fagaceae—Beech 
Family). Native of eastern North America. 
Black oak seeds. Quercitron.—The seeds of Quercus velutina Lam. (Faga- 
ceae—Beech Family). Native of eastern and central United States. 
Acorns of European white, or English, oak.—The seeds of Quercus Robur L. 
Native of western Europe and cultivated. Presented by R. S. Williams. 
Quercit. Acorn sugar (CsH;(OH);).—A sugar derived from the preceding 
and from other acorns. 
Oak bark.—The bark of Quercus velutina Lam. Native of eastern United 
States. 
Quercitrin. Quercitronic acid (C2:H220j2 + 2H2O).—A_ glucoside, which 
is the yellow coloring matter of the bark of Quercus velutina Lam. 
Cork.—A tissue that constitutes much of the periderm of most barks. 
Suberin. Cork-fat. (See No. 2401.) 
Suberic acid (CsHiz2 (COOH):2).—An acid extracted from the preceding. 
Galls. Nutgalls. Galla. (See No. 1347.) 
Tannic acid. Acidumtannicum. Gallo-tannic or digallic acid (Ci4Hi909).— 
Tannic acid derived from the preceding and of exceptional purity. 
The same, of ordinary medicinal quality. 
Gallic acid. Acidum gallicum. Trioxybenzoic or trihydroxybenzoic acid 
(C;H.O;+H20).—An acid derived naturally or artificially from the pre- 
ceding. 
Rhubarb. Rheum. Chinese or Turkish rhubarb.—The root of several 
species of Rheum (Polygonaceae—Knotweed Family). Used medicinally. 
Native and cultivated in China. 
Rhein. Rheic or Chrysophanic acid. Rhubarb yellow (CjsHioQ,).—An 
acid existing in and giving the yellow color to rhubarb. 
Emodin. Trioxymethylanthraquinone (CjsHioO;).—A principle giving the 
chief purgative property to rhubarb and a number of other cathartic drugs. 
Raffinose. Mellitriose. Gossypose (CisH220;6 + 5H20).—A sugar  oc- 
curing in beets, cotton seed, and in other vegetable products. 
BUTTERCUP FAMILY (Ranunculaceae) 
Pulsatilla. Pasque flower.—The herbage of Anemone Pulsatilla L. and 
A, pratensis L. Native of Europe. 
Anemonic acid (CioHi0Os).—An acid extracted from the preceding. 
Anemonin. Anemonic or pulsatillic camphor (CjoHs0,).—A camphor-like 
substance extracted from the preceding plants. 
Staphisagria. Stavesacre—The seeds of Delphinium Staphisagria L. 
Native of Africa and cultivated. 
Delphinine (C22H3s;NO¢).—An alkaloid extracted from the preceding. 
Staphisagrine (C22H33;NO;).—Another alkaloid from the same. 
Delphinoidine (CsHegN:07).—Another alkaloid from the same. 
Delphisine (C27H42N2O,).—Another alkaloid from the same. 
Black hellebore. Winter or Christmas rose.—Rootstock of Helleborus niger 
L. Native of Europe and cultivated for ornament. 
Helleborein (C37Hs6Ois).—A glucoside extracted from the preceding. 
