Foreign Literature and Science. 391 
5. CRYSTALLINE SUBSTANCES FROM THE JUICE oF 
of the _pinus abies \.. | have found a new substance ¢rystal- 
lizing i in square plates, soluble in 74 parts of alcohol, at 88 
centiemes, and at 14 c., insoluble in water, X&c. In the Co- 
laphane of France, procured, from all appearance, from the 
inus maritima, or pinaster, I have found another substance 
crystallizable in triangular plates, soluble in 4 parts o 
hol, equally insoluble in water, &c. hese two new sub- 
stances react, in the manner of acids; they combine as well 
with the alkalies as with the acids, and form real salts, some 
of which oluble in water and alcohol, others only in 
ether. I have ‘nile! the first abietie acid, and the aol 
pinic acid. Both were presented, accompanied with a note, 
to our Society < Natural Sciences at Lausanne, on the 7th 
of December 
pletely insoluble in water. is. named, rrovisionsiip 
breine. Finally, another in the resin of the Amyris elemi- 
fera, L. This has a near relation to the precedin , but dif- 
Seis in its greater solubility in alcohol, by its crystalline form, 
t is elemine. 
In examining the properties of potatoes, I met with sola- 
nine; this substance, whic . De focus discovered some 
years ago in two congenerous plants, the bitter-sweet the 
night shade, will therefore be added to the other products of 
the analysis which have been made of this solanum. The 
tubercules contain much less of them than the germs, which 
ave also a very acrid taste. I have no doubt that soon or 
late, st will be taken of it in medicine, and thus a 
ice will be rendered by this plant, already so valua- 
ble to man.—Ibid. 
_ rk in 
6. The Butterfly collector's Vade Bees. This wo 
12mo. with coloured —s price 5s. W. B. Whittaker, Lon- 
don, contains a synoptic table of English butterflies, with 
instructions for collecting a preserving them ; an indica- 
tion ef the particular Baws, of the eggs, the caterpillar 
