Evening Republican, Volume 15, Number 6, Rensselaer, Jasper County, 7 January 1911 — How Machinery Breathes. [ARTICLE]

How Machinery Breathes.

An English writer on engineering subjects, Mervyn O’Gorman, calls attention to the fact that' a piece of machinery, such as an automobile, laid aside after being used, is in danger of internal rusting through a kind of respiration which affects cylinders, gear boxes, clutch chambers, inters spaces in ball bearings, and so forth. Every’inclosed air space ‘‘breathes" by drawing in air when a fall of temperature contracts its walls, and expelling it when the walls expand through beat. The moisture introduced with the air is deposited in the cavities, and may produce serious damage through rust. The popular belief that 611 will protect the inaccessible parts of unused machinery is fallacious, since nearly all oils take up about three per cent, of water in solution. —Youth’s Companion.