GEOLOGY. 307 



Professor Rogers spoke of the singularity of the fact that the Paradoxidcs 

 was found also in the oldest rocks of Bohemia, separated from its fellows in 

 New England by such wide extent of sea and land. 



Professor Rogers then gave some account of his geological observations in 

 the northeastern part of Maine. He believed that there would be found 

 in this section rocks of the Upper Silurian, corresponding to the Clinton 

 group, and rising into the Devonian and Lower Carboniferous towards the 

 coal measures of New Brunswick. 



Mr. J. S. Newberry then spoke of the origin and distribution of the sedi- 

 ments composing the stratified rocks of North America. He believed that 

 mechanical deposition by the ocean took place only along shore, and that in 

 the deep sea the sediments were entirely organic. He had found this to be 

 proved by the deep-sea lead. It had been supposed that every great river 

 carried its sediment far out to sea, but the soundings off the mouth of the 

 Mississippi showed that the deposits were confined to a very limited space. 

 Apparently all the sediment which was not deposited within a few miles of 

 the mouth of the river was taken into chemical solution. He adduced 

 many instances of rocks, from New England to New Mexico, going to prove 

 this theory of mechanical deposition. He thought he found in the creta- 

 ceous formation of the West indications that -it was deposited during a 

 period of depression, and he believed that the tertiary of that portion of the 

 country was deposited during a period of elevation. 



REMARKABLE MASS OF METEORIC IRON. 



Among the collections made by Dr. John Evans, United States Geologist 

 for Washington Territory, is a small mass of iron, which has been examined 

 by Dr. Charles T. Jackson, of Boston, and found to be meteoric. According 

 to Dr. Evans, the specimen was taken from a large mass which projects 

 three or four feet from the soil of Rogue River Mountain, in Oregon. The 

 part exposed is four or five feet in width and length. 



The following is the result of an analysis by Dr. Jackson, of Boston: 

 " Specific gravity of the pure metallic mass, 7.8334; 10.7 grains yielded, 



Iron, 89.000 



Nickel, 10.290 



Tin and a little Silica, 0.729 



100.019 



" Nitric acid produces on a polished surface the usual Widmanstatian 

 figures." " It resembles the Siberian Pallas meteorite, and like it contains 

 large crystals of chrysolite, the cavities left by them being as large as 

 filberts." 



This remarkable meteorite is only forty miles from Port Orford, and could 

 be got for shipment without great expense. Dr. Jackson has urged its 

 removal to the Smithsonian Institution at Washington. Mining Journal. 



NATIVE IRON IN AFRICA. 



At a recent meeting of the Boston Society of Natural History, Dr. Hayes 

 stated that he had received additional information from Liberia, Africa, 

 which rendered it improbable that there are any deposits of native iron in 

 that country, as has been hitherto supposed; the singular specimens of 



