188 Intelligence and Miscellanies. 
bine with lime and to afford an insoluble precipitate of a 
brownish color. 
The following experiment which I have often performed, 
and which may be easily repeated will show the fallacy which 
attends Mr. Smith’s conclusion on this point. 
To some perfectly limpid lime water, previously ascertain- 
ed by the ferrocyanate of potash, to be free from iron, add a 
few drops of infusion of galls. The whole immediately as- 
sumed a purplish color, and in a short time there is deposit- 
ed at the bottom of the vessels a greenish brown precipitate. 
It may not be amiss to refer to higher somceri According 
to Dr. Thomson, gallic acid when dropped into barytes wa- 
ter, strontian water, or limewater gives them a bluish red col- 
or and occasions a flaky ey eee of the acid 
Sombined with the earth. (Vol. 2 8 Amer. Ed.) The 
same fact is mentioned by Thenard foo Brande, the latter 
of whom states the precipitate sc Mss of a et Tae color. 
This acid also decomposes the earthy carbonate 
Again “ when barytes, serciitin ¢ or lime water is pie 3 in- 
to the infusion of galls, an olive colored precipitate falls, 
which consists not only of tan nnin, but also of the extract “ 
most of the = acid combined with the earth.” (Tho 
‘son Vol, 2 
But I need fee! occupy time with other quotations, I may 
however remark, that the difficulty which attends the detec- 
tion of iron has been sufficiently shown by Mr. Richard 
’ Phillips in his “analysis of the Bath Water; where it will 
be seen that other processes, besides mere precipitation, are 
necessary to prove its existence. 
17. Tin in Massachusetts. 
“ Amnerst, March 10th, 1829. 
To the Editer of the American Journal of Science. 
Sirn—I am happy in being able to send you herewith a 
specimen of genuine New England Tin. I can indeed 
spare you but a very small quantity—only a single globule, 
reduced before the compound blowpipe: yet, as it is well 
-characterized, and the first, if I mistake not, that has been 
‘found in the United States, I trust that it will prove ac- 
le. 
It occurs at Goshen, Massachusetts; at the well known 
locality of spodumene, ‘limpid and rose beryl, rose mica, 
