The American journal of science and arts . consequence of the earthquake of 1824, is a striking ex-ample. Should the annexed Table succeed in calling the attention of ge-ologists to other divisions than those made in the infancy of the sci-ence, and grounded on particular theories, one supposing three greatepochs and a transition between the first and second of these, anotherconsidering rocks divisible into two great classes, a primary and sec-ondary, the primary containing organic remains in its upper part,—my object will, as I before stated, be fully answered. We are yetacquainted with so sm
The American journal of science and arts . consequence of the earthquake of 1824, is a striking ex-ample. Should the annexed Table succeed in calling the attention of ge-ologists to other divisions than those made in the infancy of the sci-ence, and grounded on particular theories, one supposing three greatepochs and a transition between the first and second of these, anotherconsidering rocks divisible into two great classes, a primary and sec-ondary, the primary containing organic remains in its upper part,—my object will, as I before stated, be fully answered. We are yetacquainted with so small a portion of the real structure of the earthsexposed surface, that all general classifications of rocks are prema-ture ; and it seems useless to attempt any others than those which arecomparatively local, calculated for temporary purposes, and of such anature as not to impede by an assumption of more knowledge thanwe possess, the -general advancement of geology. Sketch of a Classification of the European Rocks. 37 Stratified Rocks,. § o-a d 3 a. CO en and that 3 moi p 3nre o 5 ~ -sC^ K S3 ffun o (/J f*^ rj n) £ -r> ,_fc S.^s t. ^^ 3 § S o- o ocks sooften bof the s s 5o 3 o p tc M ^ » Cj X) a 3i C ?^ ^ 3; u H^ X* 3 3 TtJ^t; 4; S- ^ 5 Ss » 5, S5 3 W >D 38 Kectification of the Ellipse. Art. IV.—On the Rectification of the Ellipse ; by C. Wilder. Draw the indefinite right lines, AB and AB, intersecting in C,and between the lines AB and AB place the given right line DE,so that the point D may be in AB and the point E in AB; throughD and E draw DF and EF, parallel to AB and AB, then the locusof F is an ellipse, AABB^
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Keywords: ., bo, bookcentury1800, bookpublishernewhavensconverse, bookyear1820
