iv CONTENTS. 
XIII. Calstronbarite, a new Mineral — ~~ Prof. Cas. 
UruHam SHEPARD, 
XIV. New Magnetic Electrical Machine we pied power, = 
two parallel horse-shoe magnets, and two straight ro- 
tating armatures, affording each, in an entire revolution, 
a constant current in the same direction; by Cuas. G. 
Pace, M.D. - - - - 
XV. On the Dry Rot; by re ‘Sidues, - - 169 
XVI. Additional Observations on the Shooting Stare of August 
9th and 10th, 1837; by Epwarp C. Herrick, - - 180 
MISCELLANIES.—-DOMESTIC AND FOREIGN. 
Geology. 
1. Renwick’s Outlines of 6 sa - - - - - 183 
2. Geological Reports, P: - - - - 185 
3. Fossil Fishes, " - 198 
4, 5, 6. Fossil Fishes in Virginia Analysis ‘of the walls of 
the fossil Gavial of Caen, g Fossils 
found in Louisiana, : 
7, 8. Sienitic Granite, near Christiana, ‘Norway—New locality 
of Tourmaline, - . . ae ap 
General Physics and Chemistry. 
1. Notice of a splendid Aurora of 1789, 
2. Transmission of Galvanic Tight rate ania of different 
conducting powers, - - 
3. On a new pyrogenic acid, - 206 
4, 5. On the non-existence of a scien of ‘Platinum — Hy- 
drogen—Sixth satellite of Saturn, 
6. ee ~~ for 1836, es at ; Montreal, aepinee 
Canada, 
7, 8. Oil of the Tutui or Candle Nut ispakdvecellaaite - - 209 
9. New Magnetical discoveries, - - - - - - 210 
Bibliography. 
L This Journal, . 211 
2, gs — Agassiz’ me work on F ossil F sdeamcsliend io 
- = 212 
e Echinoderma 
4. eases Tables of ag - “ . » 13 
