The advance of photography : its history and modern applications (1911)

Record Details:

Title:
The advance of photography : its history and modern applications
Date:
1911
Publisher:
London : K. Paul, Trench, Trübner & Co., Ltd.
Volume:
The advance of photography : its history and modern applications
Leaf #:
000433
Language:
English
Subjects:
Motion Pictures, Motion pictures--Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
November 02, 2023
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MICRO-PHOTOGRAPHY AND PROJECTION APPARATUS 339 preparations. Fig. 149 shows this in a diagrammatical manner ; the part to the right of D represents the special attachment for this purpose. The dotted lines show the directions taken by a beam of light. The stands on B1 carry an iris diaphragm, a lens, and condensers, by the suitable arrangement of which it is possible to properly illuminate the object for the microscopic projection. This arrangement, together with a suitable camera attachment, could, if desired, be made use of to obtain Fig. 149. micro-photographs, but of course it is not intended for that purpose. It must be borne in mind that it is necessary to invert •a lantern slide if we want the image on the screen to appear the right way up ; the reason for this is selfapparent from the following figure, which represents the projection of ordinary lantern slides. (See rig. 150.) D represents the lantern slide carrier, which in this case is of a special type. The slides are placed in the carrier one above the other, the lower one being the one in use. When this is removed by gently pulling it in a downward direction, the other slips into position. The large bend in the part B-B is to give space for the hand, while this operation is being performed. Q1 represents