[ 3«S ] 
XXII. An Account of fame chemical Experiments on Tabafheer. 
By James Louis Made, Ejq. F. R. S. 
Read July 7, 1791. 
T HE Tabafheer employed in thefe experiments was that 
which Dr. Russf.ll laid before the Society, as fpeci- 
mens of this fubftance, the evening his Paper upon the iub- 
je<ft was read *. 
There were feven parcels. 
N° 1. con filled of Tabafheer extra&ed from the bamboo by 
Dr. Russell himfelf. 
N° 2. had been partly taken from the reed in Dr. Rus- 
sell’s prefence, and partly brought to him at different times 
by a perfon who worked in bamboos. 
N° 3. was the Tabafheer from Hydrabad ; the fineft kind of 
this fubftance to be bought. 
N os 4, 5, and 6. all came from Mafulapatam, where they 
are fold at a very low price. Thefe three kinds have been 
thought to be artificial competitions in imitation of the true 
Tabafheer, and to be made of calcined bones. 
N° 7. had no account affixed to it. 
The Tabafheer from Hydrabad being in the greateft quan- 
tity, and appearing the moft homogeneous and pure, the 
experiments were begun, and principally made, with it. 
* See Phil. Tranf. Vol. LXXX. p. 283. 
Hydrabad 
