Deprez's Electro-Magnetic Engine

Count Du Moncel
1879 Scientific American  
smallest possible amount of m'tterial. Here also are the I What at once appears as a remarkable fact upon looking I picture of Tertiary days was blotted out, when the present type specimens of the genera Acanthaspi8 and Acantholepi8, over these fossils, is that they all belong to the lowest grade climate of Greenland, with vast snow fields and continental ,', hich show a strange combination of plate and spine that is of vegetation, the cryptogamous or flowerless plants. Among glaciers, reaeMd
more » ... glaciers, reaeMd as far soutbward as New York and Cincin· unknown in modern fishe.3. Another slab of limestone shows all the hundreds of coal plants here assembled, we look in . nati-a time when glaciers many thousands of feet in thick· the head of an old Devonian fish that measures seven or eight vain for so much as a single leaf of a broad·leaved plant like I ness moved southward over our Northern States, grinding inches in length. The head of this fish was completely our maples and oaks. It was long supposed that there was � down the country and exterminating nearly evel'Y form of incased with solid bony plates that were strongly united by a total lack of flowers in the Carboniferous forests, but a' life that before had found there a congenial home. This sutures and highly ornamented on the exposed surfaces. specimen in this collection shows a branch of some unknown I collection contains a large number of specimens of the This fish, which has received the long name of Macropetalr plant with the remains of flowers clearly distinguishable. bowlders, the bowlder·clay, and the polished and scratched ichihys, seems to have had many features in common with As we pass on to the records of the next succeeding (Me. surfaces, that the glaciers left behind them. the structure of the living sturgeon. One of the strangest so zoic) eras, the medireval age of geology, we find no men· After the snow and ice of this great geological winter had fishes that ever swam in the Devonian seas, and which sur-tion made of the luxuriant forests and the abundant animal passed away, and a climate very similar to that which we passes in interest even the Pterichihys and OOfMsteus of the old life that passed before. Nearly all remembrance of these now enjoy had covered the land with its present flora and
doi:10.1038/scientificamerican08231879-3030bsupp fatcat:kaaolw7bafbm3f7kvzelf3y5km