SIGNALLING ACROSS SPACE WITHOUT WIRES. Being a Description of the Work of Herz and His successors

FOURTH EDITION, "with additional Remarks concerning the application to Telegraphy and later developments. And a chapter on THE PRINCIPLES OF TUNING IN WIRELESS TELEGRAPHY." Undated Edition probably circa 1909-1910. Pages up to No. 42 are Notes of Dr. Lodge's Lecture to the Royal Institution. Illustrated with many Diagrams, Drawings and B&W Photos. Light Brown cloth cover with Gilt Lettering withing Gilt Border on front. Blind stamped Border around perimeter on front & back. Gilt lettering to spine. All page edges speckled Red. Black endpapers. 154 Pages + pages of Publisher's announcements. 8 1/2" Tall, 430g. Some patchy loss of colour to cloth on front & back (see photo). Slight edge wear. Hinges sound & Binding firm. Previous owner's name at top of title page. No other inscriptions, pages in very good, clean condition. Size: 8vo - over 7¾ - 9¾" Tall.