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COPY * 2 * the time of the first measurement. For the very fait cards, K, L, and M the observational errors are relatively large and only a few measurements were made; these cards are, therefore, not included in this table. It will be noticed that A and F, the two cards subjected to a high humidity, were markedly less bright on June 24 than on May 3; this is not true of any of the other gards. Resp ee tfully, BUREAU OF STANDARDS.

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    "ocrText": "COPY\n*\n2 *\nthe time of the first measurement. For the very fait\ncards, K, L, and M the observational errors are relatively\nlarge and only a few measurements were made; these cards\nare, therefore, not included in this table.\nIt will be noticed that A and F, the two cards\nsubjected to a high humidity, were markedly less bright\non June 24 than on May 3; this is not true of any of the\nother gards.\nResp ee tfully,\nBUREAU OF STANDARDS."
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