Item 31 - James David Forbes to William Whewell

2 pp

Incomplete letter, lacking first page(s). JDF looks forward to WW's completed work [The History of the Inductive Sciences, from the Earliest to the Present Time, 3 vols, 1837]. He has planted all his long thermometers in safety [see JDF to WW, 26 Dec. 1836]. If WW has not yet completed his section on the history of magnetism JDF will send WW proof sheets announcing his law of diminution [see JDF to WW, 26 Dec. 1836]. He has commenced experiments designed 'to measure the Depolarizing effect of different thicknesses of Mica on heat from different sources, and by ascertaining the periods of Maxima and Minima to find if possible the lengths of the waves. I hope also to do something by finding the critical angles of total Reflection'.