274 
PH A RMA CO GNOS Y. 
b. Altered and unaltered starch grains present. 
Agglutinates with water ........ 185. Dextrin 
c. Plant tissues in addition to starch. 
a Do not readily dissolve or swell in cold water. 
Characteristic starch grains 186. Corn Meal 
Characteristic starch grains 187. Corn Bran 
Characteristic starch grains 188. Wheat Flour 
Characteristic starch grains . . . 189. Wheat Middlings 
Lignifled hairs, starch grains few . . . 190. Nux Vomica 
Characteristic starch grains 191. Orris Root 
Crystals of calcium oxalate 191a. Quillaja 
j9 Soluble or swelling in cold water to form a sticky 
mass. 
Few plant tissues 192. Acacia 
Starch and fragments of ducts .... 193. Tragacantha 
B. Without starch. 
a. Calcium oxalate present. 
Raphides 01 to 1 mm 191. Seilla 
b. Calcium oxalate wanting. 
Characteristic lignifled hairs 195. Nux Vomica 
II. Absence of Plant Tissues. 
A. Soluble in water. 
Monoclinic prisms 196. Saccharum 
B. Insoluble in water. 
a. Soluble in alcohol. 
Irregular fragments 197. Camphora 
b. Insoluble in alcohol. 
a Reddish color with sulphuric acid. 
Gritty, monoclinic prisms of various sizes, 
198. Saccharum Lactis 
/S No color-reaction with sulphuric acid. 
1. Soapy feel. 
Broken crystals 199. Talc 
2. Soluble in acetic acid. 
* With effervescence. 
In prisms or irregular angular fragments, 
200. Precipitated Calcium Carbonate 
An amorphous powder 201. Prepared Chalk 
Rhombic crystals or irregular fragments, 
202. Barium Carbonate 
** Without effervescence. 
