Principles of Forecasting by Means of Weather Charts

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H.M. Stationery Office, 1885 - History - 123 pages
 

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Page 10 - ... in a direction contrary to the motion of the hands of a watch, with — and be this particularly noted — a constant tendency to turn inwards towards the centre of lowest barometer.
Page 101 - ... the direction and force of the wind, and the state of the weather, and possibly the usage and custom of the port of Quebec, if any existed in relation thereto.
Page 4 - Stand with your back to the wind, and the barometer will be lower on your left hand than on your right.
Page 14 - ... appearance of the formation of true cloud; or else, light wisps or barred stripes of cirrus moving sideways appear in the blue sky, and gradually soften into an uniform black sky of a cumulo-stratus type...
Page 97 - It should be remembered that in analyzing the reports " all observations of the wind in which the force exceeded 7 (a moderate gale), or the velocity exceeded 40 miles an hour, have been quoted as instances of the occurrences of a gale ; but it has not been considered that the drum was hoisted late or was hauled down too soon, unless the force of 9 (a strong gale), or the velocity of 50 miles an hour, was reached prior to the issue of the order to hoist or subsequent to the issue of the order to...
Page 37 - ... because the prevailing wind in each is from South, West, North and East respectively. The general idea of weather types will be readily understood by considering the fact, familiar to all observers, that the weather in this country frequently occurs in spells of several weeks' duration, in which time there is a remarkable persistence of the general type of weather, over-riding both a considerable fluctuation from day to day, and a considerable local variation from place to place. For instance,...
Page 111 - Or that with which she could scarcely bear close/reefed maintopsail reefed foresail. Or that which would reduce her to storm staysails. Or that which no canvas could withstand.
Page 13 - ... which would be greater in the first than in the second. The corresponding difference of weather would be shown in a less continuous area of rain near the centre, in a smaller extension of cloud round the rain, and in a less total rainfall all over the country during the cyclone'smotion.
Page 3 - No. 0 Calm 1 Light air \ . 2 Light breeze 3 Gentle breeze 4 Moderate breeze 5 Fresh breeze 6 Strong breeze 7 Moderate gale 8 Fresh gale 9 Strong gale 10 Whole gale 11 Storm 12 Hurricane SCALE Speed Commonly observed effects of mph corresponding winds 0 Calm, smoke rises vertically.
Page 97 - ... similarity in the geological structure of the rocks, and a coincidence in the geological history of the surface of the two regions. Norway, from south to north, is almost wholly made up of metamorphic rocks, not all of the same age, yet possessing a general similarity of character. In like manner, the west of Scotland, from the Mull of Cantyre to Cape Wrath, is in great measure built up of gneiss, schist, slate, quartz-rock, granite, and other metamorphic rocks, quite comparable with these of...

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