Coal mines: the cause of fixed air, with observations on temperature, depth and effectual ventilation |
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Coal Mines: The Cause of Fixed Air, with Observations on Temperature, Depth ... Henry Stirk No preview available - 2018 |
Common terms and phrases
absence of equal air gun amongst neighbouring bodies apply to ventilation Arnott arrive atmos atmospheric air atmospheric pressure bottom breathing carboniferous carried cast shaft cause central heat Chancery Division chimney compressed conclusion confined or rarified contained crystal degree of temperature depth descending diffuses itself amongst diurnal motion divide the waters earth earth's surface effect Elasticity Encyclopædia equal pressure escape Ferguson fire Fire Damp force formation of ice fresh air gasometer gravity heaven immersed in water impure air James Ferguson laws leaf LIGHTING AND VENTILATING material creation meaning method miles miners Noah Webster observations open air Petersburgh pipe or tube pounds weight pressure into freedom principle property to rush prove Rakia rarified air readers Richard Noble says sewer shew specific gravity spout square inch substance suspended thinner tion tubes or pipes underground railways ventilating coal mines ventilating mines ventilating shaft ventilation of coal Webster word firmament
Popular passages
Page 31 - And God said, let there be a firmament in the midst of the waters and let it divide the waters from the waters. And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so. And God called the firmament Heaven. And the evening and the morning were the second day.
Page 33 - And God said, Let the waters under the heaven be gathered together unto one place, and let the dry land appear: and it was so. And God called the dry land Earth; and the gathering together of the waters called He seas: and God saw that it was good.
Page 40 - And the likeness of the firmament upon the heads of the living creature was as the colour of the terrible crystal, stretched forth over their heads above.
Page 37 - In a chimney where one foot in height of the column of hot air is one ounce lighter than the same bulk of the external cold air, if the chimney be one hundred feet high, the air or smoke in it is propelled upwards with a force of one hundred ounces. In all cases, therefore, the draught, as it is called, of a chimney, is proportioned to its length.
Page 16 - ELEMENTS OF PHYSICS; OR, NATURAL PHILOSOPHY, GENERAL AND MEDICAL. WRITTEN FOR UNIVERSAL USE, IN PLAIN, OR NON-TECHNICAL LANGUAGE.
Page 37 - Chimneys quicken the ascent of hot air by keeping a long column of it together. A column of two feet high rises, or is pressed up with twice as much force as a column of one...
Page 34 - ... transition from the brightest sunshine to the darkness of night, immediately after sunset, and from the blackest darkness to the brightest sunshine at sun-rising. But, by means of the atmosphere, we enjoy the Sun's light reflected from the aerial particles for some time before he rises, and after he sets. When the earth by its rotation has withdrawn our sight from the Sun, the atmosphere, (being still higher than we,) has the Sun's light imparted to it, which gradually decreases until he has...
Page 34 - For without it, only that part of the heavens would be luminous in which the sun is placed, and, if we could live without air, and should turn our backs to the sun, the whole heavens would appear as dark as in the night.
Page 5 - By tho care we take to shut out the external air from our houses, we prevent the escape of the deteriorated air, and condemn ourselves to breathe, again and again, the same contaminated, unrefreshing atmosphere. Who, that has ever felt the refreshing effects of the morning air, car.
Page 58 - The one now generally believed in is that the rank and luxuriant vegetation which prevailed during the carboniferous age grew and decayed upon land but slightly raised above the sea ; that by slow subsidence this thick layer of vegetable matter sunk below the water, and became gradually covered with sand, mud, and other mineral sediment ; that then, by some slight upheaval...