Note on recent investigations on the mechanical equivalent of heat

Yesterday (June 16) I received, from Professor Ames, of Johns Hopkins University, the results of an important investigation which has been carried out under the direction of Professor Rowland and himself. An elaborate comparison of the thermometers used by Rowland, with certain standards supplied by the International Bureau, has been performed by Mr. W. S. Day. This comparison has been made under conditions as similar as possible to those prevalent when the thermometers were used by Rowland during his original experiments.