3^4 Mr. Macie’s Account of 
Thefe properties are exa% thofe of common torch. 
N° V. 
Agreed entirely with N° IV. in appearance, properties, 
and nature. 
N° VI. 
The pieces of this parcel were white, quite opaque, and con- 
fide r ably hard. Their tafte and effefts at the blow-pipe, were 
perfectly limilar to thofe of the Hydrabad kind. 
N° VII. 
Much refembled N° VI. only was rather fofter, and feetned 
to blacken a little when firft heated. With fluxes at the blow- 
pipe it fhewed the fame effedts as all the above. 
Conclujton . 
i. It appears from thefe experiments, that all the parcels, 
except N IV. and V. confifted of genuine Tabalheer ; but that 
thofe kinds, immediately taken from the plant, contained a 
certain portion of a vegetable matter, which was wanting in 
tne fpecimens procured from the Ihops, and which had pro- 
bably been deprived of this admixture by calcination, of which 
operation a partial blacknefs, obfervable on fome of the pieces 
° f N ° ni * and VL are doubtlefs the traces. This accounts 
ano for the fuperior hardnefs and diminilhed taftes of thefe 
forts. 
. 2 * The nature of th is fubtonce is very different from what 
might have, been expe&ed in the produtt of a vegetable. Its 
mdetou&ibility by fire ; its total refinance to acids ; its uniting 
by 
