KINETOGRAPH AND PROJECTING KINETOSCOPE
ALTHOUGH many of the arts in which Edison has been a pioneer have been enriched by his numerous inventions and patents, which were subsequent to those of a fundamental nature, the (so-called) motion-picture art is an exception, as the following, together with three other additional patents,1 comprise all that he has taken out on this subject: United States Patent No. 589,168, issued August 31, 1897, reissued in two parts -- namely, No. 12,037, under date of September 30, 1902, and No. 12,192, under date of January 12, 1904. Application filed August 24, 1891.
There is nothing surprising in this, however, as the possibility of photographing and reproducing actual scenes of animate life are so thoroughly exemplified and rendered practicable by the apparatus and methods disclosed in the patents above cited, that these basic inventions in themselves practically constitute the art--its development proceeding mainly along the line of manufacturing details. That such a view of his work is correct, the highest criterion-- commercial expediency--bears witness; for in spite of the fact that the courts have somewhat narrowed the broad claims of Edison's patents by reason of the investigations of earlier experimenters, practically all the immense amount of commercial work that is done in the motion-picture field to-day is accomplished through the use of apparatus and methods licensed under the Edison patents.
The philosophy of this invention having already been described in Chapter XXI, it will be unnecessary to repeat it here. Suffice it to say by way of reminder that it is founded upon the physiological phenomenon known as the persistence of vision, through which a series of sequential____________________