[Gutenberg 61169] • Essays on the Microscope / Containing a Practical Description of the Most Improved Microscopes, a General History of Insects, etc., etc.

Excerpt from Essays on the Microscope: Containing a Practical Description of the Most Improved Microscopes; A General History of Insects, Their Transformations, Peculiar Habits, and Economy; An Account of the Various Species, and Singular Properties, of the Hydre and Vorticelle

The first chapter contains a Short history of the invention and improvements that have been made on the micros_cope, and Father Di Torre's method of making his celebrated glass globules. The second treats of vision, in which I have endeavoured to expla' in a familiar manner the reason of those advantages which are obtained by the use of magnifying lenses; but as the reader is supposed to be unacquainted with the elements of this science, so many intermediate ideas have been necessarily omitted, as must in some degree lessen the force, and weaken the perception of the truths intended to be inculcated: to have given these, would have required a treatise on optics.

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