Excerpt from Notes on Heating and Ventilation Work is measured in foot-pounds. The unit of work is the work required to raise one pound through a height of one foot. Ten units of work or ten foot pounds would be the amount of work done in raising ten pounds One foot high or one pound ten feet high. Heat is a form of motion, hence there must be some definite relation between heat and work. This relation was first determined by Joule. By a series of experiments Joule found that one heat unit was equivalent to 778 foot-pounds. It is possible, then, to express heat either in heat units or in foot-pounds. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.