308 ’ Scientific Intelligence. 
_ “ | haveseen, (adds the author) a head thus prepared, which 
had been exposed alternately to the sun and rain during sever- 
al years, without having suffered the slightest change. It was 
very little deformed, and easily recognized, although the flesh 
had become as hard as wood.” 
6. Marches KINDLING WITHOUT FIRE. 
(From Thenard’s Chemistry, Vol. ii. p. 525.) 
This match is prepared by mingling two parts of the oxy- 
muriate of potash and one of sulphur, which by means of a 
little gum is attached to a common sulphur match. ‘This match 
on being dipped into, or rather slightly wet with, strong sul- 
phuric acid, (oil of vitriol) immediately catches fire. 
The author has’ not added the caution that the sulphur and 
salt should be pulverized separately ; if rubbed together in a 
mortar, they will explode with some danger to the operator, 
provided the quantity be over a few grains. 
Matches made upon this principle, have been for sometime 
‘made and sold in this country. They are sometimes put up 
in little japanned cases with a small phial, from which when in- 
verted with the mouth open, nothing will drop, and yet the 
match kindles on being thrust in quite to the bottom. The 
truth is, these bottles contain a little amianthus, moistened with 
sulphuric acid, which thus kindles the match, but as the acid §00B 
weakens by attracting water from the air, it is better to use @ 
phial of the acid in the liquid state. A few drops answer the 
purpose and when this is weakened, it is easily renewed. 
7. Cleaveland’s Mineralogy. | 
Oar opinion of this work was fully expressed in the review 
of it in our first number. In the Edinburgh Review for Sep- 
tember, 1818, this work is again reyiewed, and ina manner 
which must gratify every friend to American Science- It will 
be necessary to cite only a single sentence.—After commend 
ing the condensed and honest manner in which the work is print 
ed, (for they say, that the same matter which here fills one vol- 
ume would in England have been spread over three,) the Fe 
