A Practical Treatise on the Construction, Heating, and Ventilation of Hothouses: Including Conservatories, Greenhouses, Graperies, and Other Kinds of Horticultural Structures. With Practical Directions for Their Management, in Regard to Light, Heat, and Air

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O. Judd, 1881 - Greenhouses - 366 pages
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Page 364 - ... ones generally practiced. It is an ORIGINAL AND PURELY AMERICAN work, and not made up as books on gardening too often are, by quotations from foreign authors. Every thing is made perfectly plain, and the subject treated in all its details, from the selection of the soil to prepaiing the products for market.
Page 167 - The weight of steam, at the temperature of 212, compared with the weight of water at 212, is about as 1 to 1694; so that a pipe which is filled with water at 212 contains 1694 times as much matter as one of equal size filled with steam. If the source of heat be withdrawn from the steam pipes, the temperature will soon fall below 212, and the steam immediately in contact with the pipes will condense ; but in condensing, the steam parts with its latent heat ; and this heat, in passing from...
Page 135 - I would hero observe on the importance of keeping in mind this double relation of weight and volume, and the atomic constitution of these gases, as it will prevent much of that confusion which too often embarrasses those who are not familiar with the subject of gaseous combinations. Let us now, in the same analytical manner, examine an atom of atmospheric air, the other ingredient in combustion. Atmospheric air is composed of two atoms of nitrogen and one atom of oxygen ; and here again we find a...
Page 310 - ... small sticks, and there was no substance to radiate heat downwards to the latter grass, except the cambric handkerchief. The temperature of the grass, which was thus shielded from the sky, was upon many nights afterwards examined by me, and was always found higher than that of neighbouring grass which was uncovered, if this was colder than the air. When the difference in temperature, between the air several feet above the ground and the unsheltered grass, did not exceed 5, the sheltered grass...
Page 366 - SPORTSMAN'S COMPANION, containing brief descriptions or outlines of nearly one hundred and eighty works upon legitimate Out-door Sports and Amusements, and illustrated with a great number of engravings, many of them drawn from life, and faithfully portraying the points and characteristics of game, birds, fishes, horses, dogs, etc., etc.
Page 321 - ... 3. Plants with annual stems require more than those with ligneous stems. 4. The amount of moisture in the air most suitable to plants at rest is in inverse proportion to the quantity of aqueous matter they at that time contain. (Hence the dryness of the air required by succulent plants when at rest.) CHAPTER IV.
Page 314 - ... still and clear nights. The cause, indeed, of this additional cold, does not constantly operate; but its presence, during only a few hours, might effectually destroy plants, which now pass unhurt through the winter. Again ; as things are, while low vegetable productions are prevented, by their covering of snow, from becoming colder than the atmosphere in consequence of their own radiation, the parts of trees and tall shrubs, which rise above the snow, are little affected by cold from this cause....
Page 161 - ... then 1-279 cubic feet of air will be cooled 30 by each square foot of glass, or, more correctly, as much heat as is equal to this, will be given off by each square foot of glass ; for, in reality, a very much larger quantity of air will be affected by the glass, but it will be cooled to a less extent. The real loss of heat from the room will therefore be what is here stated.
Page 317 - Plants, it is true, thrive well, and many species of fruits acquire their greatest state of perfection in some situations within the tropics, where the temperature in the shade does not vary in the day and night more than seven or eight degrees ; but in these climates, the plant is exposed during the day to the full blaze of a tropical sun, and early in the night it is regularly drenched with heavy wetting dews ; and consequently it is very differently circumstanced in the day and in the night, though...
Page 364 - Its author is well known as a market gardener of eighteen years' successful experience. In this work he has recorded this experience, and given, without reservation, the methods necessary to the profitable culture of the commercial or...

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