Fogs
Learn about weather from a world and scentific point of view. Extreme storms, mild rain, blisting sun and whipping wind are all elements of weather. Discover how they work.
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NORTHERN HEMISPHERE. Axis line, wind N.E., barometer falling, first half of storm. Axis line, wind S.W., barometer rising, last half of storm. RIGHT-HAND SEMICIRCLE. Wind E.N.E., E...
In sketching out a system of observation having especial reference to atmospheric waves and rotatory storms, regard has been had--_first_, to the instruments that should be used, t...
It is the object of the following pages to exhibit, so far as observation may enable us, and in as brief a manner as possible, the connexion, if any, that exists between those terr...
The solution of the question--How far and in what manner are storms connected with atmospheric waves?--must be extremely interesting to every one engaged in either the naval or mer...
In sketching out a system of barometric observation having especial reference to the acquisition of data from which the _barometric character_ of certain large areas of the surface...
A contraction of rules for foretelling weather--in accordance with the following pages--is submitted, for scales of common barometers. RISE FALL FOR FOR N. ELY. S. WLY. NW.-N.-E. S...
In the year 1853 a conference of maritime nations was held at Brussels, on the subject of meteorology at sea. The report of this conference was laid before Parliament, and the resu...
Familiar as the practical use of weather-glasses is, at sea as well as on land, only those who have long watched their indications, and compared them carefully, are really able to...
On the recommendation of the Kew Observatory Committee of the British Association for the Advancement of Science. This instrument should be suspended in a good light for reading, b...
The daily movement of the barometer may be noted (in a form or table of double entry) at the time of each observation, by a dot at the place corresponding to its altitude, and the...
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The instruments devised for the purpose of ascertaining the humidity of the atmosphere are termed hygrometers. The earliest invented hygrometers were constructed of substances read...
The following words are usually engraved on the scales of these barometers, although they are not now considered of so much importance as formerly:— At 31 inches  Very dry. " 30...
The vernier, an invaluable contrivance for measuring small spaces, was invented by Peter Vernier, about the year 1630. The barometer scale is divided into inches and tenths. The ve...
Fortin’s plan of constructing a barometer cistern is shown in fig. 2. The cistern is formed of a glass cylinder, which allows of the level of the mercury within being seen. The bot...
Fig. 36 The peculiarities in the construction of thermometers will be best understood by describing the manufacture of a Standard Thermometer, which is one of the most accurate mak...
The Dry and Wet Bulb Hygrometer, or Psychrometer, known also as Mason’s hygrometer (fig. 79), consists of two parallel thermometers, as nearly identical as possible, mounted on a w...
This instrument, represented in fig. 56, is a special construction of Rutherford’s minimum thermometer to meet the requirements of horticulturists. It is desirable, if not essentia...
The directions for fixing the barometer, and making it portable when it has to be removed, should be attended to carefully. The barometer should be suspended against a frame or pie...
Some of the first barometers made by Messrs. Negretti and Zambra on Admiral FitzRoy’s principle were severely tried under the heaviest naval gun firing, on board H.M.S. Excellent;...
The surface of the earth absorbs the heat of the sun during the day, and radiates heat into space during the night. The envelope of gases and vapour, which we call the atmosphere,...