a full and detailed account ere long. I have too at last discovered 
abundance of fossil cones, the fruit or seed vessels of the fir-trees 
composing the forests of the Wealden, and of which, as you 
ba 2 will remember, Brook Point in the Isle of Wight, affords a nota- 
ble illustration. I have also a beautiful fossil palm-leaf from the 
tertiary strata of the Isle of Wight, being the first species of this 
kind found in England. 
Chester Square, Pimlico, November 8, 1850. 
: 
; 
SCIENTIFIC INTELLIGENCE. 
I. Cuemistry anpD Puysics. 
es b 
Crnebuiions” of a similar character from others will of course not be 
excluded by this arrangement, but I shall hold myself responsible only 
or those notices which appear over my initials. 
New York, Jan. Ist, 1851. Woxcort Giszs.] 
‘ se U 
Fetitrzcn in Greiswald.*—The researches of Lenz and Jacobit on the 
moir,i 
of 
the Current upon a magnetic needle by means of a permanent magnet, 
the magnetic intensity of which has been previously referred to absolute 
easure. The needle is placed upon the middle of a scale at right 
Angles to the magnetic meridian, the center of the needle forming the 
point of the scale. A helix of copper wire the length of which is 
Tepresented by 2a, (102™™), is placed upon one side of the needle, 
, $21, + do. xlvii, 225. t do, Lxxviii, 21, 
No. $1.—Jan., 1851. 14 
Scientific Intelligence. 105 — 
were contemporaries of the Iguanodon: of these I hope to give es 
ad 
