Descriptive catalogue 1914 : Frost & Adams Co. importers and dealers in artists' materials, architects', engineers' draughtsmen's supplies, mathematical instruments and pyrography requisites. (1914)
Frost & Adams · Frost & Adams · leaf 659
eingcamped and the clamp of the axis released |, the telescope may bedirecl-d either above orVlow to the place desired. To determine.twopoints in a straight line with the instrument and on ^J>e f1^!1/centre direct the telescope to one of the points, then clamp the plates,and the other poini may… … This Instrument is constructed of Bronze metal, grad-uated to yt degrees and numbered iu quadrants ; has■t 5 inch Needle, Plate 15 inches, two Spirit Levels,Detachable Sights which have fine slots cut throughnearly their whole length, terminated at intervals by-circular apertures through which the…
Artists' materials · Drawing instruments · Paint
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![An illustration from Original microscopic drawings made between the years 1824 and 1840 mostly published in works by Dr. Goring & A. Pritchard [graphic]. (1824)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b21301177-88-1.webp)
