IV. On the coefficient of expansion of a paraffine of high boiling point

In the search for a liquid of high boiling-point which could be used for the exact determination of the coefficient of expansion of iodide of silver, and which at the same time should be free from certain objections which apply to the employment of mercury for this purpose, a paraffine of high boiling-point naturally suggested itself. Mr. W. H. Hatcher, to whom I express my acknowledgments, procured for me a specimen of paraffine which was taken from one of the stills at Messrs. Price’s works at a high temperature. With it the following experiments were made.