Excerpt from A Comparison of Rowland's Mercury Thermometers With a Calendar-Griffiths' Platinum Thermometer: A Comparison of the Platinum Thermometer With a Tonnelot Thermometer Standardized at the Bureau International Des Poids Et Mesures; And a Reduction of Rowland's Values of the Mechanical Equivalent of Heat to the Paris Nitrogen Scale The temperature of the water in the calorimeter was then raised at a rate of about 10 Degrees to I 5 Degrees per hour to the next temperature at which a comparison was to be made; this was accomplished by sending a suitable current through a coil wrapped on the outside of the calorimeter. When the desired temperature was reached, the current was cut off or so regulated that the temperature was very slowly rising, when a further series of simultaneous observations were taken, and so on to the end of the scale. 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.