Universal applied mathematics calculating aid - is transparent stencil with cut outs in given relationships

摘要

The stencil contains cut-out portions representing values, unit, formulae, symbols, etc., for use in maths, chemistry, mechanics, physics, technical drawing, etc. The cut-outs are arranged so that they have given relationships when any edge of the stencil is used as the base line. The shape of the stencil may be triangular or four sided, and a protractor may be used e.G. with the longest side.