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Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve ...

Excerpt from A Study of the Igneous Rocks at York Haven and Stony Brook, Pa. And Their Accompanying Formations: Thesis, Presented to the Faculty of the Department of Philosophy of the University of Pennsylvania, in Partial Fulfillment of the Requirements for the Degree of Doctor of PhilosophyYork and Adams counties, and refers them all to dolerite. With this exception little if any work has been published in regard to them.The following invest...

Excerpt from A Study of the Igneous Rocks at York Haven and Stony Brook, Pa. And Their Accompanying Formations: Thesis, Presented to the Faculty of the Department of Philosophy of the University of Pennsylvania, in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy York and Adams counties, and refers them all to dolerite, With this exception little if any work has been published in regard to them. The following in...

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