An essay on a new construction, of the reflecting telescope, which by means of a scale of magnifying powers, is made on universal perspective. Performing The Office Of I. Of a common Reflecting Telescope. II. Engyscope, for shewing all near Objects. III. A Megalascope, for all the larger Sort of small Objects. IV. A Microscope, for small Objects. V. A Helioscope for making the Sun's Image by Reflection only. VI. A Helioscope by Reflection and Refraction. Vii. A Solar-Disk Microscope. Viii. A Catadioptric Microscope

Publication Date1775
Publisherprinted for, and sold by B. Martin, NO. 171, Fleet-Street



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