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 651
must beat right angles tothe centre The level casing, too. is a casting, and the ^«JlwrtlJso fastened into this casing as to preclude any strain. and its true tornpreserved. The focussing slide is of drawn brass turned and c,-»sely filThi.Vu^py Level stands as an example of good practice, and… … •5. Builders Transit. Erecting Telescope, 9 inch, withMagnifying Power of 25 diameters and Objective with1 % inch aperture. Dust Guard, Sun Shade and Cap.Level to Telescope with Ground and GraduatedBubble. Rack and Pinion Movement to ObjectiveImported Spiral Motion to Eyepiece for…
Artists' materials · Drawing instruments · Paint
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