Staple Dietary Ingredients Secured | My Web Site Page 285 Chapter 03 Page 05

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The mastiff is a large, grave, sullen-looking dog, with a wide chest, noble head, long switch tail, bright eyes, and a loud, deep voice. Of all dogs this is the most vigilant watcher over the property of his master, and nothing can tempt him to betray the confidence reposed in him. Notwithstanding his commanding appearance, and the strictness with which he guards the property of his master, the mastiff is possessed of great mildness of character, and is very grateful for any favors bestowed upon him. I once went into the barn of a friend where there was a mastiff chained; I went up to the dog and patted him on the head, when out rushed the groom from the stable exclaiming, "Come away, sir! He's dangerous with strangers." But I did not remove my hand nor show any fear. The consequence was, that the dog and I were the best of friends; but had I shown any fear, and hastily removed my hand, I might have fared rather badly, for this dog always couples fear with guilt.

It is evident that at the highest possible velocity of exit from the generating tubes, nothing but steam will be delivered and there will be no circulation of water except to supply the place of that evaporated. Let us see at what rate of steaming this would occur with the boiler under consideration. We shall have a column of steam, say 4 feet high on one side and an equal column of water on the other. Assuming, as before, the steam at 100 pounds and the water at same temperature, we will have a head of 866 feet of steam and an issuing velocity of 235.5 feet per second. This multiplied by 1.07 square feet of opening by 3,600 seconds in an hour, and by 0.258 gives 234,043 pounds of steam, which, though only one-eighth the weight of mingled steam and water delivered at the maximum, gives us 7,801 horse power, or 32 times the rated power of the boiler. Of course, this is far beyond any possibility of attainment, so that it may be set down as certain that this boiler cannot be forced to a point where there will not be an efficient circulation of the water. By the same method of calculation it may be shown that when forced to double its rated power, a point rarely expected to be reached in practice, about two-thirds the volume of mixture of steam and water delivered into the drum will be steam, and that the water will make 110 circuits while being evaporated. Also that when worked at only about one-quarter its rated capacity, one-fifth of the volume will be steam and the water will make the rounds 870 times before it becomes steam. You will thus see that in the proportions adopted in this boiler there is provision for perfect circulation under all the possible conditions of practice.

As in language, so in mythology, investigation has proceeded from, the known to the unknown--from the higher to the lower mythologies. In each step of the progress of opinion on this subject a particular phenomenon may be observed. As each lower status of mythology is discovered it is assumed to be the first in origin, the primordial mythology, and all lower but imperfectly understood mythologies are interpreted as degradations, from this assumed original belief; thus polytheism was interpreted as a degeneracy from monotheism; nature worship, from psychotheism; zooelotry, from ancestor worship; and, in order, monotheism has been held to be the original mythology, then polytheism, then physitheism or nature worship, then ancestor worship.

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