40 



duces no turbidity in a solution of glue, unless it be previously 

 treated with nitric acid, whereby a brown substance is precipitated. 



Cateclill Taiiuic Acid. In the Catechu (see Catechin) [also 

 in the bark of the Prickly Banksia of "Western Australia.] Not 

 known in the pure state ; is a product of decomposition of catechuic 

 acid (not the substance from which the latter is formed, as for- 

 merly stated). Macerate the catechu with ether, agitate the 

 solution with water, decant tlie ethereous liquid and evaporate to 

 dryness; dissolve in water and allow the catechuic acid to 

 crystallise. The mother-ley contains nearly pure Catechu tannic 

 acid. It precipitates the salts of oxyd of iron with a dirty-green 

 coloui', also glue. 



Cedl'ill. The bitter ingredient of the fruit of Simaba Cedron. 

 Remove a fatty substance by treating with ether, and dissolve the 

 bitter substance by means of alcohol. White, silky needles, still 

 more bitter than strychnin, little soluble in cold, readily in boil- 

 ing water, of neutral reaction. 



Cellulose. See Fibrin. 



Centaiii'iii = Cnicin. 



Ceradia Resin = C40 Hss O 4 . From Othonna furcata. Amber- 

 yellow, smells like elemi, has an acid reaction when dissolved in 

 alcohol. 



Cerasiil. See Cherry Gum. 



Ceratopliylliu.* In Parmelia physoides [and probably also in 

 other Parmelias]. Pour lime-water on the lichen washed before 

 in cold water, let stand no longer than 15 hours, and precipitate 

 the slightly yellow solution with hydrochloric acid. Wash the 

 deposit with cold water and dry, exhaust with boiling alcohol of 

 75°/q, and boil the residue that has not been dissolved, with a con- 

 centrated solution of carbonate of soda. The C is said to form in 

 crystals when the solution has cooled down. — Thin white prisms 

 of at first faintly afterwards strongly rancid and burning taste ; 

 fuses at 147° and sviblimates in laminse; dissolves more readily in 

 hot than in cold water; also in cold concentrated sulphuric acid 

 unaltered, readily in alcohol, ether and alkalies, and precipitable from 

 the latter solution by acids; becomes purple-violet by choride of 

 iron, 



Cerealill. Ingredient of the bran of the grains of cereals, 

 possessing in a high degree the faculty of converting starch into 

 dextrin — therefore a kind of diastase. To obtain it, treat the bran 

 with several changes of dihited alcohol in order to remove foreign 

 matters; afterwards exhaust with cold water, filter and evaporate 



* This term is apt to lead to a very different jilaiit and might advantageously be changed 

 to Pannelin.— F. v. M. 



