ICOADS Web information page (Tuesday, 08-Nov-2005 23:59:40 UTC):

Figure 7. Maury Collection logform types (colors) in terms of numbers of reports per day (daily, 5 reports/day, 14 reports/day, and hourly). The total period of record for the Collection is 1784-1863.

[US Maury Collection][US Maury Collection: Time Adjustments]

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Updated: Nov 8, 2005 23:59:40 UTC