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 563
U.S. Standard or foreign measure-ment, and allowance made for the shrinkage of drawings. Itis also pro-vided with index marks for a number of scales for U.S. Standard andMetric measurements. The Testing Disk greatly facilitates the rapidfinding of settings, proves instruments accuracy and aids in… … 4235. Improved Polar Planimeter, German Silver, like 4230but with special device for finding the Mean Heightof Didicator Diagrams (explained on page4<iJ) each, J35.50 The Steel Points of this instrument when not in use. are protected byGerman Silver Caps so not to interfere when measuring areas…
Artists' materials · Drawing instruments · Paint
Internet Archive · Building Technology Heritage Library · Public Domain Mark 1.0. Free to use for anything.
