The chemical decompositions of the London Pharmacopeia / by Charles Mingay Syder.

  • Syder, Charles Mingay.
Date:
1821
Catalogue details

Licence: Public Domain Mark

Credit: The chemical decompositions of the London Pharmacopeia / by Charles Mingay Syder. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    By a preceding rule the Moon was 10 days •old, then, 10x4zz40-r-5 + 2r:10, therefore it was high water at London Bridge at 10 o'clock on the given day. EXAMPLE II. Required, the time of high water at the same place July 13, 1820? Epact 15, day of the month 13, the number corresponding to the month 5, then, 15+134-5 — 30zz3 the moon's age 3 then 3x4 —— zz 2 hours 24 minutes for the southing, add 2 for the tide ; therefore it was high water at 24 minutes past 4. • Required, the time of high water at Lon- don Bridge on the following days : May the 1st, November the 9th, and Decem- ber the 25th, in the present and ensuing year. The time of high water at any other place than at London may be found by the same rule, if instead of adding 2 as given in the rule for London, there be substituted the time of bigh water at the given place on the day cf