Jasper County Democrat, Volume 2, Number 16, Rensselaer, Jasper County, 29 July 1899 — To Indicate Inflation of Tires. [ARTICLE]

To Indicate Inflation of Tires.

A neat little attachment bicycles consists of an air-pressure indicator which shows the hardness of the tire without the necessity of soiling the hands to test it. rhe new device consisting of a cylinder to be attached to the valve with a spring controlled piston inside which rises as the pressure increases.