20 Notice of Prof. Clark’s Thesis on Metallic Meteorites. 
river Weichsel, Prussia. Found in 1850. Described by G. Rose 
in 1851. Weight 43 lbs. 40z. Discovered in excavating a sand- 
hill on the line of the East Railroad, at the depth of four feet. 
It had the form of a right rectangular prism, with rounded edges. 
It was inclosed ina thin crust of hydrated oxyds, and intersected 
by two or three seams, so that by means of chisels and hammers, 
it was easily divided into three pieces. ‘The most of it is pre- 
served in the Royal Museum at Berlin. The metal incloses a 
few small masses of magnetic pyrites. It exhibits when etched, 
the Widmannstattian figures very perfectly, the whole surface 
being ornamented by two sets of very long, straight bands one- 
eighth of an inch wide, which cut each other at angles of 60 and 
120°, while a third set much wider and shorter, intersect these 
somewhat irregularly. Gr. = 7°77, Clark. Analysis by Ram- 
melsberg. 
Metallic portion. Insoluble part. 
Tron, - 93°18 os 22:59 
Nickel, * 577 - 34:77 
Cobalt, = - 1:05 Copper, 4-74 
Insoluble, - 0:96 Chromium, _ 3:90 
——— Phosphorus, 34:13 
99:98 - 
100-13 
33. Teras.—34. Carthage, Tenn.—35. Guildford, N. Car.— 
36. Burlington, N. Y.—Prof. Clark gives a new analysis of this 
very beautiful meteorite, so remarkable for the white color of its’ 
metal and the peculiar pattern of its etched surfaces. 
Iron, - - - - 89-752 
Nickel, - . - 8 897 
Cobalt, - - - - 0625 
Copper, - - - - ? 
Manganese, - - - - ? 
Insoluble phosphurets,  - - 0-703 
99:977 
Iron, : - - - 91:38 
Nickel, - pe re ‘ie 8-62 
100-00 
