> lt ae 
rey 
* “Achromatic m 
to Pr 
A. 
“Aca Ritciny of Natural Sciences of Phila- 
delphia, 
Academy: of Sciences of St. Petersburgh, 
Ste of morphine, 184. 
Acetic acid, crystalizable 136. 
Addition hig iawtte Fy article, 418. 
Aikin’s Dictionary of Chemistry, 93. 
» on prteeton Gon heat: 96. 
Alun j in mica slate 
ysterite, 
sti ig Leibnitz, 56. 
penne try, 
i ctoris, use of iodine in, 411. 
ines, 165. 
medals At i Geneva, 391. 
\sbestos i impregnated I vith platinum, 160. 
Asparagin, 
\tholl, ites 
\tlantic a prevailin 
\tm, carbonic 
Mg afinity of to the ‘Diallage family, 
of notice concerning, 307. 
ng s storms ¢ of, It: 
>P>p>br>b> >> 
3 ae anal 
Lead 
Aurora borealis seen : ae 396. 
Austria, rail roads in 
Azotic gas in 
INDEX TO VOLUME Xx. — eo 
ie 
3 
Birch, bark of, containing a ornnegt new 
| principle, 282, 
Black Sea, ‘analysis of, 188. 
Bloodgood, S. De Witt, on aed ae 
Bone caves in Ne va 30, 
Bones, fossil, from 370. 3 
nnycastle, ost on the geology of the 
Caiaraqui, 74 
) oe ells, 
ton Mechanics’ Magazine 
dtenic Garden of St. Peataree 1% 
ranch mint in North Carolina, 401. 
rande’s Manual of Chemistry, 88. 
vetentubiie: nalysis of, 1 
sromine, per tion of, 
works at Hingham, 161. 
Bronn, Prot. his bia proposal to exchange pet= 
hae, 2 tions, 3: 
5 ah Me ag of, 307. 
Bulllo mineral spit, 1 
t. 
Canada, literary and selentific secieties of, 
Caou tchouc, se es properties of, 404. 
drab gery allized, 1 
nic acid in t the Lge 
Carburetted rogen 
_ steam boilers, 10. 
————_ decomposition | of, 186. 
ear as fuel for 
S 
ae 
paca springs, 388 
B. ty 
Babba bage, Prof., oa os, decline of Science 
in «gt: 
Bache, Prof., on n asafety apparatus 
toe Rak boats, 317. 
ee eye R. on the salt springs of Mou- 
219. 
Beri, , history of, 389. 
ius, his System of Chemistry, 
tuline, a supposed new principle e 
Central forces 
lybeate water, a remarkable one, 384. 
Ching “ wood, 189. ~ 
enev ; notice of, 305. 
ee plats ay ee 
Chloride of silver, 193 
Chai, Dr., reply to, by Prof. Olmsted, 
Ghiouist of potash, pur 
5, Chronemeters, pusfeation of oil for, 166. 
a pon, 
- on the cite Wr: of 
birch, 282. n, tT. 
Birds, = a new work on, 161. Sulphuric ic acid, 347. 
he 
4 t, 
4 it “oc ye 
