A more com plete collection in the original languages is to be found in Vols. 13-1'5 of the modem edition of Kepler's collected works, JO H A N N E S KEPLERS GESAM-MELTE W ERKE, ed. von Dyck and Caspar, Munich: C. H. Beck, 1937 and later. In the past, these letters appear to have received insufficient at tention in the study of Kepler's work and position. (The present English translations of all quotations from them are the writer's.) Excerpts from some letters were also translated in Carola Baumgardt,

The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Holton, Gerald J. 1978. Subelectrons, presuppositions, and the Millikan-Ehrenhaft dispute. In Historical studies in the physical sciences, eds.

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Data for ultrasonic absorption and sound speed are given for water, methyl alcohol, ethyl alcohol, n-propyl alcohol, n-butyl alcohol, eugenol, carbon tetrachloride, n-hexane, and toluene, for pressures ranging up to about 5000 kg/cm2.

thank the Executor and Trustees of the Albert Einstein Estate, and particularly Miss Helen Dukas, for help and for permission to cite from the publications and documents of Einstein. Early versions of the paper were discussed in my History of Science seminar, and a draft was presented as one of the Monday Lectures at the University of Chicago, November 1967. I am also grateful for the opportunity which the Rockefeller Foundation and the Director of the Villa Serbelloni provided to write up the final draft.