| RefNo | MA/101/1 |
| Previous numbers | MA.101 |
| Level | Item |
| Title | Meteorological observations at Plymouth, England, by John Huxham |
| Creator | Huxham; John (1692-1768); British physician |
| Date | 1725 |
| Description | Daily measurements of barometric pressure, temperature and humidity, with notes on wind direction, and weather conditions ['Tempestas & Coeli Faries'] . Commencing with two sets of observations for each day, occasionally varying between one observation and up to four per day. Throughout, there is a single entry for daily rainfall, totalled each month. These are combined for an annual total at p.24.
From August 1725, two thermometers are in use: 'our' thermometer and a Hauksbee-style instrument, an alcohol-based measure developed by Francis Hauksbee the younger, after an original design by Robert Hooke. At this point, there is a note of comparison between the two at the end of the month. 'Thermometrum Hauksbeianum in eadem loco, in quo nostrum suppenditur, ut eorum differentiam accuratius ad notarem. Nunquam immedaite afficiuntur sole, nel igne. Quod spiritus in utrisque thermometris, diversis termperibus, non aeqicali ratione vol elevatur vol deprimitur, pendet a capsula lignea, in qua globus ponitur: quam ob causam hauksb, thermom, calore vol frogore aeris circumflui tadius afficitur.' [The Hauksbee thermometer is in the same place at which ours is suspended, in order to note their difference more accurately. They are never directly affected by the sun or by fire. That the spirit in both thermometers, at different temperatures, is not raised or lowered in an equal ratio, depends upon the wooden box in which the ball is placed. For that reason, the Hauksbee thermometer is more affected by the heat and cold of the surrounding air]. |
| Language | Latin |
| Extent | 24p. [verso pages generally blank] |
| Format | Manuscript |
| PhysicalDescription | On paper |
| Dimensions | 380x248mm. |
| AccessStatus | Open |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA816 | Huxham; John (1692 - 1768) | 1692 - 1768 |