Experiments and Discoveries . 87 
We shall wind up with one observation, addressed to the 
commercial public,- — namely, that, if any vessel be in future 
allowed to go to sea, and especially to high latitudes, without 
the precautions so clearly pointed out by Mr Barlow, the loss 
both of property and of lives, in the event of shipwreck, may in 
most cases, as we conceive, be fairly attributable to the owners. 
In answer to a letter addressed to Professor Barlow, on the 
subject of his Plate, respecting which a great degree of interest 
has been expressed at Leith, Glasgow, and other ports in Scot- 
land, he has informed us, that at present his Plate, with com- 
plete Instructions for its use, will soon be ready for sale, at 
Messrs W. and T. Gilbert's, in London; and that he would re- 
commend to them to correspond with their agents at the diffe- 
rent sea-ports, in order to make some arrangements for the sup- 
ply of all ships. In the mean time, he authorises us to an- 
nounce, that he is preparing for publication, in a popular form, 
a minute description of the method of trying the experiments, 
and of affixing the Plate. We need scarcely promise our read- 
ers to give our pages gladly to the circulation of instructions, 
contributing so directly to the improvement and security of na- 
vigation. 
Art. VI . — - Analysis of Finite from St Pardoux in Auvergne . 
By C. G. Gmelin, M. D. of Tubingen. Communicated by 
the Author. 
THE near relation between Finite and Mica has been ob- 
served by a great many mineralogists. Kirwan marked this mi- 
neral by the name of Micarelle , and Werner placed it close to 
mica. Bernharde, on the other hand, thought, that the genus 
Pinite should be joined to that of Tourmaline ; but against this 
union most of its properties seem to militate. 
