1922 Cover Profilometer Public Roads Bicycle Springfield Illinois Highway SCA3 YTG5 scrubbing floors

scrubbing floors

Lighting Fixtures

There is a very small brown blemish in the bottom margin of this ad

John Biggers

Other models are the Studebaker "30" Model H

1922 Cover Profilometer Public Roads Bicycle Springfield Illinois Highway SCA3 YTG5 scrubbing floorsPlease note that this is a cover only. This is an original 1922 color cover for Scientific American featuring an image of two men using a profilometer, which was an instrument that was used to measure the roughness of the highways. It is shown here testing the roads near Springfield, Illinois. CONDITION This 89+ year old Item is rated Very Fine +++. Light aging throughout. Light wrinkling. No natural defects. No surface rub. No tears. No water damage.