154 BOTANICAL AND PHARMACEUTICAL DESIDERATA. 
Gutta Percha. — That of Singapore is ascertained to be 
the product of a new plant, Isonandra Gutta of Hooker, 
in the London Journal of Botany, vol. vi. p. 331,463, tab. 
17. {Pharmaceutical Journal, vol. vii. p. 179.) The ap- 
pearance of the inspissated gum, which is imported from 
Borneo under that name, indicates a different source. 
Other Malay islands are said to to afford gutt a percha, but 
probably from yet other plants. This should be inquired 
into: the chemical characters of the juice in a fresh state 
should be ascertained, and compared with those of caout- 
chouc. 
Green Tea. — Is indigo or any other vegetable die used to 
colour the green tea in the northern provinces of China ? 
Specimens of the plant and dye so employed are desiderata. 
Is turmeric or any yellow vegetable dye used in conjunction 
with it, or with Prussian blue ? 
Japan Wax. — The true source of this wax. 
Jlssafaztida. — From what species of Ferula is this ex- 
tracted, and how ? Does the same species yield the Tear 
assafoztida and the lump ? Specimens of the one or 
several assafcetida plants should be procured, with the gum- 
resin produced by each species. 
Patchaouli, or Puchd Pdt. — A well known perfume, of 
comparatively recent introduction to Europe. It is referred 
to a plant now described by botanists under the name of 
Pogostemon Patchaouli ; but we are ignorant of the mode 
of its preparation and the exact locality where it is pro- 
duced. 
Sago of Japan. — Is it from a Cycas, and what species ? 
Also specimens of sago in different stages of manufacture, 
with the trees yielding them, from the various parts of the 
Indian Archipelago ; so that we may identify the particular 
kinds of sago yielded by the several sago-palms. Is the 
Ceylon sago the granulated pith of the talipot-palm (Cory- 
pha umhraculifera ? 
Korarima. — A large kind of cardamom, or aromatic 
i 
