crabtree ives (5 Ergebnisse)

Printed Wrappers. Zustand: Fine. First Edition. Offprint, As Issued. Fine.

Printed Wrappers. Zustand: Fine. First Edition. Offprint, As Issued. Fine.

Printed Wrappers. Zustand: Fine. First Edition. Offprint, as issued.

Printed Wrappers. Zustand: Fine. Photrographs (illustrator). First Edition. Offprint, As Issued. Fine.

Softcover. Zustand: g. 8vo. (21pp). Reprinted from Transactions of the Society of Motion Picture Engineers. Vol. XI, Number 31, 1927, pp. 522-541. "When freshly developed or so-called "green" motion picture film is passed through a projector, there is a tendency for an incrustation to accumulate on the aperture plate or tension springs which retards the free passage of the film through the machine. Chemical analysis has shown that this incrustation consists largely of gelatin with more or less silver, dirt, and oil, but it contains usually only a trace of the metal or alloy of which the gate is composed. It is the object of this paper to discuss the various methods of lubrication employed to date and to indicate a new method which is equally satisfactory for sound record and ordinary motion picture films." Illustrated with eleven in-text b/w photographic reproductions and one drawing. Photos show various machinery used in the process as well as photomicrographs of film. Printed wraps. Three holes created by paper puncher along spine. Some age wear, creasing and soiling on wraps. Signature of previous owner on front cover. Wraps in good-, interior in very good condition. Scarce.