Telegraphic Cipher Code: Gerrish System

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The Observatory, 1906 - Cipher and telegraph codes - 15 pages
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Page 7 - Eegard being had to the existence of any possible proper motion, the positions obtained were referred to the mean equinox of the beginning of the year...
Page 3 - The system and code were devised by Mr. Willard P. Gerrish, of this Observatory, who has prepared the following description and instructions.
Page 8 - The first date of. the-ephemeriğ is expressed by the number of the month and the day of the month, and corresponds to the first position given in the ephemeris.
Page 6 - ... numbered consecutively; thereafter the number was z-(x), where z was the consecutive number of the decision and x that of the meeting (eg, 7-(648) was the seventh policy decision taken since Meeting 630, and was taken at Meeting 648). From January 1, 1952, the number of the decision has been followed by the last two figures of the year and the number of the meeting in that year in parentheses (eg, Decision No. 102-(52/11) was the 102nd decision since Meeting 630, and was taken at the eleventh...
Page 11 - William F. Anderson announces that a comet, visible to the naked eye, was discovered by him, Jan. 15.1432, 1906, Greenwich Mean Time, in Right Ascension 20* 37™ 14*.2 and Declination + 7° 12
Page 7 - Group of five figures (check number) computed as the sum of the preceding five-figure groups. If this sum is a number of six figures, the left hand figure (first figure) is discarded.

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