Allen, Charles Ricketson, 1862- [from old catalog] · New York, H. Holt and company · leaf 4
MAR 18 182? ) ^y ( NEW YORKHENRY HOLT AND COMPANY 1892 Copyright, 1892, BY HENRY HOLT & CO. Q ts M s\ Z-. Robert Drummond, Electrotyper and Printer,New York. PREFACE. Most of the experiments in this collection exact of thepupil measurements of some sort, that is, are quantitive.A few, included…
Physics
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