Brinton, Willard Cope, 1880- · New York, The Engineering magazine company · leaf 320
be too great for even the largest corporations. Another disadvantage of using lantern slides is the impossibiUty of getting shdes made quickly enough to represent always the latest points plotted on the curves. By using the original curve cards directly in the reflecting lantern there is always a… … Fig. 218. Reflectoscope as Made by A. T. Thompson & Co., Boston, Mass. Lantern slides may be used as shown at the top of the picture. The stand holding the book may be replaced by a simple carriage arranged to take the 4-by-6-inch and the 4-by-12-inch curve cards. The very latest data from the file…
Graphic methods · Statistics
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
