lv CONTENTS. 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—On the penetration of Magnetism into soft iron, by Dr. 
von Ferxitzcu in Greifswald, 105.—On the law for the intensity of Magnetism 
ced in soft iron by alvante currents n the action ‘of heat and alk 
ine bases npon the homologues of Acetl Acid, 107. products of the 
action of Chlorine rpo op e: O sombinations of Io d Ph i 
phorus, reparation of Chlorate of ash : e: Absorption of car- 
bonic ox y an ammoniacal mae ie hlorid as copper: On the color- 
ing principles of Madder, 109.—Act of Sulphite of Ammonia, 111.—On |. 
ot a -hippurie acid : Action of ey heron acid ods aldehyde ammonia, 112. 
the Nitroprussids, a new class of Salts, by Dr. Lyon Piayrair, 3.— 
ropert i 
es a new erly of Carbonic Oxyd, EBLANC: On the Aéro ic 
Balan P _—Preservation of the to-Sulphate of Tron 
from Oxydation, by M spint: Freezing point of Water | xP e, 
by Prof. Cuomsoy: ‘Test for the Pr —— in saad 
body, by Dr. Snow, 115.—On the behavior of Cum acl he ie 
System, by Dr. Hormann: Action of bret ul | Qi of ‘Bitter Minin 6 
Animal System, by C. G. MirscHer. 
uerehes = Pony ogy.—Report of Progress, of the Soglogicn! bg of Can 
D. E. Logan, Exq., 116.—On the Gold Mines of Dar n, Emigration to 
gaat (YS 
ae aber and Shas Bi of the Isthmus of Sener DN : : 
ols On the sagen Phenomena of the Mager se of pe pea ae re 
e Rem n the General Subject, by Mr. R. Cua peeel 9.— 
ee fou ae Gland of Mau , Hawaiian Group, by ANA: " Gibbsiten 131. - 
Zoology.—On the order of isis sion of Parts in a F. 
Pounraces, 121.—On the Principles of Classification, by L. AGASSIZ, 192 
Observations on the Blind Fish of the Mammoth Cave, b Acassiz, 127.— 
On the Car aoe Collections of the United States, by Pro ewis R. 
Grapes, 123.—Observations on the Fishes of Nova Scotia and Labrador, by i 
we ep ri e new Planet Parthenope: The new Planet Clio: Anot ther new 
Plane —Petersen’s Comet: Bond's Comet: Shooting Stars of August 10, 
ey arr teoric Observations in November and December, 1850: “Meteor 
es Il Daylight: Meteor ns September 3), "1359, 131.—Periodical Meteors 
of. Augie, 1843 and 1849, by C. B. Forsuey, 133. 
st Sst Ha ape Arent —Translation of part of a letter from Mr. E. F. de 
Furubjelm, o of the officers of a Scientific Expedition sent out by | ee Empe- 
ror og Russia % the pecan part of Finnland and Lapland, to Ose - Lies 
ber, 136.—Notice of a remarkable Spring or wig in n Hollis, now Phipsborg, 
Maine, about seven atte rom Saco and from Ken nk, by Rev 
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N. ¥., to the summit of Mount Washington in New Hampshire, by Joet 
aenge ws, 138.—Makerstoun Observations on the Aurora Borealis,+ by J- 
_ Bro E, Fisq , 139.—Relative level of the Red Sea and Mediterranean, 142.— ~ 
; Fall ‘of Dust 4 Olsterholz, near Detmold: Tenacity of Metals, 143.—Odituary. 
liam Gambel, 143. 
Bisiograpy —A Biindtse . the Studies of the Lary ees of Ca Tosophea He 
AM aged — M.A., F.R.S., 144.—Elements of Natural Philoso 
tT, LL D. The Recent Pee Astronomy, 
in ihe United Siates, "by Prof. Exras Loomis, 146.—Ne 
try, b TH: Practical Hand-book of Medical 
Bo: Fea Geolog 
ON ae e Daguerrian Jou 
at 1 thy cle 
ee Ai wéitte a 
Pa Gfeen-bquses, Gra 
‘ ractiral diréctions. 
