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CONTENTS OF VOLUME XIIl. 
NUMBER XXXVII. 
* 
Art. I. Ona New Method of recording differences of North Polar 
_ Distance or Declination PY IRSLD REROUE by Professor 
OQ. M. Mitcnet, - : 
Il. On the Distribution of sierseaalll ; on the ‘Suieack of Or- 
ganic Matter in Stalactites forming Crystallized and Amor- 
phous Crenate of Lime; and on the one of cout 
by Davin A, Weis, - 
Il. Instructions for making wet Vecembic. of pee Sub- 
stances; by Henry Goansy, M.D.,F.L.S., — - 
IV. Notice of a new Object Glass made by Charles A. Secioke 
of Canastota, N. Y.; by Auexanper S. Jonnson, Esq.,_ - 
V. Notice of some undescribed Infusorial esa zh ALEXANDER 
8. Jonnson, Esq. . 
VI. On Coral Reefs acd eat: a ties D. Daas eas 
VII. Notices of Botanical Literature, &c. ; by A; Gray, - - 
VIII. Views on the Nature of —. Structure ; ; oy Lieut. 
-E. B. Hun 
IX. On the Manicipal Electric lista slis epaiibty i in its ap- 
plication to Fire Alarms; by Winttam F. Caanntne, M.D., 
X. Observations on the Freezing of Vegetables, and on the Causes 
which enable some Plants to endure the action of extreme 
Cold; by Prof. Joun Le Conte, M.D.,_ - ad ae ae ee 
XI. On the Drift of Lake Superior; by E. Deson, - -. = 
SCIENTIFIC INTELLIGENCE. 
Physics —On the Magnetic relations of Gases: Artificial formation 
of Minerals, 110.—Preparation of Tungstate of Soda and Tungsten, 112.—Phos- 
phuret of Tungsten: Telluret of Ethyl: On white Precipitate, 113.—Quantita- 
tive separation and determination of Phosphoric Acid: Propylamine in Plants: 
Sulphid of Nitrogen, 114.—On a class of ammoniacal compounds of Cobalt, 115, 
Mineralogy and Geology. ee ee Notices, by W. P. Braxe, 116.—On the 
angles of Eumanite, by J. E. Tescuemacuen: On the Silurian System of Cen- — 
of the Ball 
tral Bohemia, by M. Barranpe, 417iscRadalindihie and A 
Coal. Burdwan Mines, by Henry Pivpixetos: Gold 
ie * ae ca 
