Aid for cversion to SI units - with slide rule settings for given conversion factors

摘要

The aid can be used to convert numerical values of physical variables from any system of units into the SI system. The aid comprises a sheet showing the correct slide rule settings for given conversion factors. Colour coding may be used, e.g. to indicate units no longer permitted or dates on which use of given units must cease. The sheet is preferably punched (5) for easy insertion in a binder. The individual pages have a pair of scales (2) marked on a common scale line with the old units (3) marked on one line and the SI units marked on another scale line on the opposite side.