1833.] Bactrian and Indo-Scythic Coins. AO> 
proposed by Mr. Mzruvuzn*, and founded on experiment, will serve to 
explain why the precious garnets are only found in the soil beneath 
the rock. ¢ 
I conceive that in this instance, as well as many others I have wit- 
nessed, of crystallization, the small particles of garnet are brought 
together by molecular attraction; and by the temperature, which is 
nearly constant, the moisture and superincumbent pressure, oranda of . 
the precious stone are formed. 
In this mode I have seen felspar and zeolite recrystallized, at. the 
fiat of the rocks, as well as in the alluvium they afford by decom- 
position. 
. The garnets when collected are gently pounded, and the bad ones 
broken ; those which survive the blows are reckoned of good quality. 
The cheapness of these precious stones becoming greater every day, 
from the quantity found in all parts of the world, and the facility and 
exactness with which they are imitated rendering them of smaller value ; 
the discovery of a fresh mine is scarcely worthy of notice. 
I cannot close my present sketch without expressing how much I 
have been assisted by the kindness of Mr. Russeuu, resident at Hydera-- 
bad, and of Mr, Rauru, a gentleman in His Highness’ service, who was 
my fellow-traveller for three months in a difficult part of the country, 
which I might never have seen but through his aid. 
Til.—Bactrian and Indo-Scythic Coins—continued. By Jas. Prinsep, 
F. R. S., See. As. Soc. 
The present plate introduces us to some of the coins of Doctor Swinry’s 
collection already alluded to in my last communication. It is as well 
to premise that all order of arrangement is out of the question where 
new objects are every day dropping in, and where the epoch of so many 
of our coins is not yet satisfactorily ascertained. Thus it happens that 
although headed ‘‘ Bactrian,” the last plate, as well as the present, con- 
tains coins of other dynasties. 
Dr. Swiney pursued a course very similar to that of Colonel Tod in 
forming his collection.—‘‘ The plan I have found most successful under 
favorable circumstances of locality, or where no one has already explored 
the same ground, (and I have followed it many years before I heard of 
Colonel Ton’s eminent success in the same pursuit,) is this : upon the line 
of march [ employ an intelligent servant, generally a Musulman tailor, 
to buy up old pyse, which the danyas in some towns are in the habit of 
putting aside as useless, perhaps from father to son, and which rarely 
* See Journal of Science and Arts, vol. i. 
