CAJORI, Florian. A History of Physics in its Elementary Branches Including the Evolution of Physical Laboratories. New York: The Macmillan Company, 1909. (Browning.) Green cloth (soiled, chipping). Provenance: Orris Emery (signature, 1914). Later edition. – HINTON, Charles Howard. The Fourth Dimension. London: Swan Sonnenschein & Co., Limited, 1906. Color folding frontispiece, numerous diagrams. (Slight browning.) Maroon cloth (some staining). Provenance: acquired from John M. Watkins (bookplate). Later edition. – LORENTZ, Hendrick Antoon. The Theory of Electrons and its Applications to the Phenomena of Light and Radiant Heat Leipzig and London: B.G. Teubner and G.E. Stechert & Co., 1909. 4to. Dual title-pages for New York and Leipzig. (Slight browning.) Original cloth binding, spine gilt-lettered (some wear). Provenance: Franklin institute Library (bookplate, perforated stamp). FIRST EDITION  – RISDON, Philip James. Wireless. J.A. Fleming, Introduction. London and Melbourne: Ward, Lock & Co., Limited, [1924?]. Portrait frontispiece, numerous diagrams, numerous photographic illustrations. (Some spotting.) Red cloth (spine fated, stained, hinges weak). Second edition. – Together, 4 works in 4 volumes, all 8vo except where indicated,  all in publisher’s cloth bindings, condition as described.