vi CONTENTS. 
Page. 
wx. “ot a Substitute for Welther’s Tube of Safety, with No- 
es of other. subjects ; aye Mirnonatay Frots of Scheme 
Min c. Univ. of N. Car 345 
XII. On a Portable Hygrometer ; by A. A. Hay - 351 
XI, persia ghisiornay in the northern parts sof New Eng- 
and, by. Cuarres Neary Surparp; Assis. to the rok. 
of Chem. and Min., Lect. on Bot. in Yale College, 353 
XIV. Philosophical Transactions of the Royal Saciely of Lon- 
on, for the year 1829, 361 
XV. Chemical Observations and Experiments on n Tobacco; by 
C. C. Conwetr, M. D, Phila 369 
SCIENTIFIC INTELLIGENCE, 
CHEMISTRY. 
1, 2. On the Setting of Plaster—Braconnot’s Indelible mE, 371 
3. The Diamond, 372 
4. Of the influence of air on the crystallization of salts, 373 
5. Combination of Mercury with metallic - 375 
6, 7. Colored Steel eter Chemical =e th "of light, - 376 
= A new Ether, . 377 
. Pure Milk, - 378 
s Discovery ne new metal named Thor 3 
11, 12. Action - oles on Organic Materials—Compositon of 
the Atmospher 
13. Cont hestions and Cryallizations, effected by the action of 
weak electrical forces - - - 383 
MEDICAL CHEMISTRY. 
1. Preparation of Morphia, without the use of Alcohol, 384 
2, 3, 4, 5. Plumbag gine, anew vegetable iebetante:Anetyats of 
Ip Branca, Root of the Viola Ipecacuanha— 
Decomposition of Corrosive Sublimate by pear able 
Bodies—Rosaic Acid in Human Urine, 385 
NATURAL HISTORY. 
i. Natural History of the Mole, 386 
2, 3. On the different Genera and Soceing cate with Cin- 
chona—Influence of Chemical Solutions on Plants, 388 
MECHANICAL PHILOSOPHY, 
1. Resistance in Space to the Motion of Heavenly Bodies, 389 
2; 3, =. n’s Active Stored: estvaeyen as Vermin in 
ips eam, 
4. Electricity of the Solar 
5, 6. Leech Bi Bag 6 thes — Terrestrial Mennatians sae 
. STATISTICS. 
. = Hospital: 
3. Progress of uta Instruction in Denmark-—Eucational 
enenc 
Rca 
