48 Review of Cleaveland’s Mineralogy. 
book, and which give it peculiar interest to the American, and 
even to the European, reader. ‘ 
In another edition, (which we cannot doubt will speedily 
be called for,) he will of course add whatever is omitted in this, 
and we should be gratified to see a good article on the subject 
of the serotites or stones which have fallen from the atmosphere. 
This subject is one, in our view, of high interest ; and although 
in strictness it may not claim a place in a tabular view of mine- 
rals, (we must confess, however, that we see no important 
obstacle to its being treated of under the head of native iron,) 
there can be no objection to its being placed in an appendix. 
‘The fall of stones from the atmosphere is the most curious and 
mysterious fact in natural history. 
It may seem perhaps too trivial to remark, that the annexa- 
tion of numbers, referring to the pages, would be a serious 
addition to the utility of the tabular view. Very few inadver- 
tencies have been observed—the following may be mention- 
ed: Amenia, in the State of New-York, is printed (by a typo- 
graphical error we presume) Armenia; and Menechan, where 
the menechanite is found, is mentioned as occurring in Scot- 
land, but it isin Cornwall. _ 
Authors seem agreed that the black-lead ore is an altered 
carbonat, but they seem not to have been so well agreed as to 
the nature of the blue-lead ore. In the cabinet of Colonel 
Gibbs, there are specimens which appear satisfactorily to illus- 
trate both these subjects. ‘The black lead is reducible by the 
blowpipe alone to metallic lead; there is one specimen in the 
cabinet referred to, which is blackened on what appears te 
have been the under side, and it looks as if it had been done 
by the contact of sulphuretted hydrogen gas; that which was 
probably the upper part remains unaltered, and is beautiful 
white carbonat of lead; this appearance is the more striking, 
because the piece is large and full of instertices, by which the 
gas appears to have passed through. The blue ore is in large 
six-sided prisms of a dark blue or almost black colour ; where 
the prisms are broken across, they present an unequal appeat- 
ance; sometimes they are invested; and sometimes slightly: 
and at other times deeply, penetrated by sulphuret of lead, hav- 
