Washington, DC: (Jenkins Laboratory Inc., 1925).
Hardcover. First edition. Blue cloth with gilt. Near fine with a touch of rubbing on the spine gilt, some wear at the edges and a few subtle indentations on the front board. Inscribed to the astronomer who created dendrochronology: "To Dr. A.E. Douglas [sic] In appreciation of his interest in my work C.F. Jenkins 1/15/30." Jenkins, a co-inventor of the film projector (his early patents were acquired by Edison), pioneered a mechanical method of wireless transmission of synchronized sound and images, and opened the first broadcasting television station in the U.S. His mechanical technologies were eventually eclipsed by an electronic form of television, but to this day The Academy of Television Arts & Sciences presents a special Emmy Award in his honor. A nice copy of this book inscribed to a noted American astronomer.