BARLOW, PETER. - THE FIRST "BARLOW LENS"

An account of a Series of experiments made with the view to the construction of an achromatic telescope with a fluid concave lens, instead of the usual lens of flint glass. In a letter adressed to Davies Gilbert.... Read January 17, 1828.

(London, Richard Taylor, 1828). 4to. No wrappers as extracted from "Philosophical Transactions" 1828 - Part I. Pp. 105-112.

First appearance of the paper in which Barlow described his invention of the so-called first "Barlow-Lens".

He constructed his first achromatic telescope lens by enclosing liquid carbon disulfide between two pieces of glass. The Barlow- lens has come into general use for increasing the eyepiece power of any optical instrument.

Order-nr.: 46089