(51) 



256. Karomoni resin. — A gum resin produced by Sympkonia globulifera L.f. 

 {Clusiaceae — Gamboge Family). Native of northern South America and 

 cultivated. From Jamaica. Presented by W. Harris. 



1257. White dammar. The product probably of Shorea Talura Roxb. (See 



number 1084.) From Java. Presented by Patterson & Co., of New York. 



1258. Brown Manila copal. — A fossil resin produced by Valeria indica L. Same 



family. Native of the East Indies. From Borneo. Same donor. 



1259. Zapote gum. Probably produced by a species of Lucuma {Sapotaceae — 



Sapota Family). Native of Peru. From the New York drug market. 

 Donated by H. H. Rusby. 



1260. Malay torch. — An unknown resin wrapped in palm leaves and used as a 



torch by the natives of the East Indies. From the Field Museum of 

 Natural History. 



1261. Another variety of the same. Same donor. 



1262. Brea de Tierra. — A fossil resin of unknown botanical origin. From Paraguay, 



through the Field Museum of Natural History. 



Dye-stuffs and Other Coloring Matters 



The tissues of many plants contain substances which are 

 capable of imparting definite colors to fabrics and other 

 substances, when treated with them in various ways. Cer- 

 tain families, such as the Rubiaceae, or madder family, and 

 the Boraginaceae, or borage family, are especially rich in 

 such plants. Usually the possession of such coloring 

 matters is restricted to certain parts, and different parts of 

 the same plant may contain different coloring matters. 

 The color produced in dyeing by the use of a coloring matter 

 is usually not the same as that imparted by it to the plant 

 that contains it. Often, the plant tissue containing it will 

 exhibit no particular color. As a rule, the coloring matter 

 can be caused to yield more than one color in dyeing, by 

 combining it with other substances, or by varying the 

 method of its use. Vegetable tissues containing useful 

 coloring matters are called dye-stuffs. In many cases, 

 they are used in their entirety, while in others the coloring 

 matter is extracted in a more or less purified form before 

 marketing. 



1263. A mixture of lichens from which litmus is manufactured. 



1264. False orchella weed. — Plants of Roccella fruticosa Lauer (Roccellaceae — 



Roccella Family). Native of California. From the New York College of 

 Pharmacy. 



