viii mm " CONTENTS. 
Page. 
5, 6, 7, 8 9. Needle ore.—Platina and gold of the Uralian 
~ Mountains.—Idocrase in the Isle of Skye.—Chiastolite. 
Antimonial Nickel, 395 
10, 11. Account of artificial felspar. — Crystals of bide of 
chrome, 396 
PHYSICS. 
1. New Thermoelectric piles of Nobili, 397 
ASTRONOMY. 
1. Comet of Biela, 398 
MISCELLANEOUS. 
1. Introduction of Frogs into Ireland, 398 
2, 3. On the rapidity of Vegetable Organization. —How to 
make eatable food from wood, 399 
a - 
x¢> Some memoranda of errata, having been mislaid, are necessarily omitted. 
