File:California fish and game (20487475326).jpg

Title: California fish and game
Identifier: californiafishga67_2cali (find matches)
Year: [1] (s)
Authors: California. Dept. of Fish and Game; California. Fish and Game Commission; California. Division of Fish and Game
Subjects: Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons
Publisher: (San Francisco, etc. ) State of California, Resources Agency, Dept. of Fish and Game
Contributing Library: California Department of Fish and Game
Digitizing Sponsor: Internet Archive

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NOTES 131
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FIGURE 2. Exploded view of slide rule used to locate bit values for decoding randomly cut, six binary bit, coded wire nose tags. To make the slide rule, print the masterword and associated bit values twice on each side of a plastic strip. On one side they should be printed in reverse order—a CWT is often reversed when placed on a pencil magnet for reading under a binocular scope and with a reverse scale the tag can be read in either position. We used a dry lettering transfer process to print on a 0.4-mm white plastic strip measuring 15 cm long and 1.3 cm wide. The windowed slide was constructed from two pieces of 0.6 mm clear acetate 9 cm long and 2.5 cm wide. Using contact cement, the acetate was cemented together with narrow spacers along two edges. The spacers provide clearance in the middle for the plastic strip. The window was formed by painting all except a windowed area eight bits long on each side of the slide with a waterproof felt tip pen. When using the slide rule, a tag reader first locates the masterword on a CWT. The white plastic strip is then moved through the window until the masterword shown on the rule matches that shown on the CWT. The bit values shown on the slide rule will be in the correct location for decoding the data words on that CWT.

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