F. H. Richardson's bluebook of projection (1935)

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1935
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
00024
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
March 21, 2024
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CHAPTER I. ELECTRICAL ACTION ( 1 ) The very foundation principle of electrical action is polarity, which is in effect the separation of elements or forces that desire to unite. Just what electricity is no one yet knows, though many theories have been advanced. We do know, however, that if a wire be attached to the positive pole of an operating dynamo or a charged battery, and another wire be attached to the negative of the same instrument, and these two wires be properly attached to a suitable motor, the motor will be caused to operate and produce power ; also we know that if the wires be brought into direct contact with each other a shower of sparks will be produced. In other words we can, by means of suitable devices, make positive and negative electricity perform work as the two forces amalgamate. Only Two Wires (2) Insofar as concerns electrical action, every electric circuit consists of just two wires (conductors) — a negative and a positive. (3) There may seem to be more, as in the 3-wire system, but upon analysis it is found that the extra wire or wires merely form additional 2-wire circuits, which may be used either singly or together. (4) Each electric circuit consists of one 6