Boston: Lee & Shepard, 1877. First Edition. Very Good. Item #09458
12mo, 128 pages; publisher's brown cloth, printed in black, pale yellow end papers. Let us quote the author in the Preface: " As the speaking-telephone, in which magneto-electric currents were utilized for the transmission of speech and other kinds of sounds, was invented by me, I have described at some length my first instrument, and have also given explicit directions for making a speaking-telephone which I know, by trial, to be as efficient as any hitherto made; but nothing in the book is to be taken as a dedication of the invention to the public, as steps have already been taken to secure letters-patent according to the laws of the United States." Light wear at spine ends; neat owner name of C. E. Peck on ffep. Illustrated in black and white. Internally clean and bright.