The progress of the development of the law of storms, and of the variable winds, with the practical application of the subject to navigation. / by Lieut-Colonel William Reid.
- William Reid
- Date:
- 1849
Licence: Public Domain Mark
Credit: The progress of the development of the law of storms, and of the variable winds, with the practical application of the subject to navigation. / by Lieut-Colonel William Reid. Source: Wellcome Collection.
Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.
415/468
![I reprint the following remark in order that attention may be directed to that portion of it printed in italics. “9tli September, 1842.—A storm came on soon after noon the next day from the south-west, which continued with little inter- mission, and accompanied by snow and rain, but varying in direction between south and west: as might have been expected in such a tempestuous ocean, and at a period of the year corre- sponding with the boisterous month of March in our latitudes, we encountered during our passage from the Falkland Islands to Cape Horn very severe weather, the gales usually commencing in the south-ivest, veering to the west, and generally, as in the North Atlantic Ocean, ending in the north-west. m I have not been able to obtain a sight of any of the log-books of either the Erebus or the Terror for 1842. Sir John Ross may have met gales moving from east to west, which this mode of veering from S.W. to W. and N.W. in the southern hemisphere would indicate. It is the barometer which enables us to separate one gale from another: the barometric observations made on board those two ships are therefore necessary, before these exceptional cases can be fully established. The atmospheric pressure is found to be less in high southern latitudes than in high northern latitudes. Table of Mean Pressure, and the Amount of Atmospheric Tide in different Latitudes south of the Equator, as given by Cap- tain Sir James Ross, from hourly observations made between the 20th of November, 1839, and the 3lst of July, 1843: — Lat. Pressure. Atmospheric Tide. At the Equator 29-974 •047 at sea. 13°. 0'S. .. 30-016 •060 yy 22°.17' 30*085 •053 yy 34°.48' 30-023 •052 j i Cape of Good Hope and Sydney. 42°.53' 29-950 •050 Van Dieman’s Land. 45°. 3' 29-664 •031 at sea. oo • o 29-469 •040 ] i Kerguelen and Auck. land Islands. CHAP. XV. Captain Ross, 2nd vol. page 281. Sir J.Ross’ Table.](https://iiif.wellcomecollection.org/image/b2499148x_0415.jp2/full/800%2C/0/default.jpg)
