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Evans optometric rule / measuring scale
OPTOMETRIC INSTRUMENTS
rule
wood
1999.3044
OPTOMETRIC INSTRUMENTS
rule
wood
Long wooden rule with one V-shaped end. Obverse features Age scale from 10 to 55, A.C. (accommodation) scale from 18 to 1.5 and A.M.P. (amplitude) scale from 6 to 66. Black metal slider.
1999.3044
Gift of Arthur C. Mawson in memory of H.P. Southcott, 2001