| Heat slowly and uniformly to 1,450 deg.F. and forge thoroughly. Do not under any circumstances attempt to harden at the forging heat. After cooling from forging reheat to about 1,450 deg.F. and cool slowly so as to remove forging strains. ... Read more of Oil-hardening Steel at Steel Making.ca | InformationalPrivacy |
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The VultureThis strange looking bird is also a bird of prey; but it feeds generally on dead carcases or offal. There are several kinds of vulture. The largest of all birds of prey is the Condor, a South American species. There is also the King Vulture, a native of the same country, called so not from its size, for it is the smallest of the race, but from its elegant plumage. Mr. Waterton, the naturalist, relates a little story of a King Vulture, which seems to show that, though so much smaller, this bird is regarded with some degree of reverence by the common vultures. He says that "the carcase of a large snake, which he had killed in the forest, becoming putrid, about twenty of the common vultures came and perched in the neighbouring trees; amongst them came also the King of the Vultures; and he observed that none of the common ones seemed inclined to begin breakfast till his majesty had finished. When he had consumed as much snake as nature informed him would do him good, he retired to the top of a high mora-tree, and then all the common vultures fell to, and made a hearty meal." Mr. Waterton also observed that the day after the planter had burnt the trash in a cane-field, the King Vulture might be seen feeding on the snakes, lizards, and frogs, which had suffered in the conflagration. Indeed the vulture is of real service in this respect, for he clears the carrion away from the hot countries he inhabits, which would otherwise putrify and infect the air. In some places, as at Paramaribo, the value of these birds, on this account, is so fully recognized, that they are protected by law, a fine being imposed on him who kills one. The vulture is to be found in almost all hot countries. A traveller in Abyssinia speaks of having seen them hovering, as a black cloud, over an army of soldiers, in numbers like the sands of the sea. After a battle they come sweeping down to feed upon the slain. Indeed they prefer dead to living food, and must be endowed with a wonderfully keen sense of sight or smell, the former is thought most likely, as no sooner does a beast of burden drop in the deserts exhausted on the sands, than vultures begin to make their way towards the carcase. Whence they come none can tell, and the only probable suggestion is that they hover at a height beyond the ken of human eye over a passing caravan, for they are first noticed as specks in the air above, moving slowly round in circles as they descend spirally upon their prey. These birds are most voracious, gorging themselves with as much as they can possibly contrive to swallow. They are also very strong and difficult to kill, one of the condors having been known to walk about after it had been strangled and hung on a tree with a lasso for several minutes, and to keep on its legs after receiving three balls from a pistol. The vulture is wonderfully fitted by nature for the part it has to fill as "scavenger" abroad, this being the name they often go by. It is large and strong, so that the carcase of a horse or a buffalo is not too much for it to attack. Its legs are strong, but not armed with sharp claws like those of birds that feed on living prey. Its wings are long and wide, and its bones, though thick, unusually light, so that the bird can remain an immense time poised in the highest regions of the atmosphere. Its beak is strong and hooked, and remarkably well formed for tearing or dividing, and what is still more noticeable, the head and neck which, from the disgusting nature of its food, must often be buried in unclean carcases, are quite, or very nearly, destitute of feathers, which, in such a situation, would be soon covered with dirt or blood, and could not be kept clean by the bird's own bill. The smell of vultures is, as may be supposed, very offensive, and they are altogether very disagreeable birds to have anything to do with; but they are appointed to fill a particular office in the world, and are found invaluable in performing it. The largest vultures are fifteen or sixteen feet from the tip of one wing to the tip of the other, even when not stretched to the utmost, and four feet from beak to tail. Its legs are as thick as a man's wrist, and its middle claw seven inches long. They bring forth their young on the tops of inaccessible rocks, in sunny regions, more than twelve thousand feet above the level of the sea. The European Vulture dwells amongst the Alps, but flies as far as the mountains of Africa and Asia. It is not so large as the condor, seldom exceeding the size of an eagle. THE PARROT. Now I have to talk to you of much prettier birds, though, alas! to tell the truth, not half so useful as the disgusting vulture of whom we have been speaking. This picture represents a cockatoo, one of the parrot tribe, of which there are at least 250 species, including, besides this, the parrot, macaw, lory, parrakeet, etc., etc. Parrots are all, for the most part, tropical birds, and in their native climates the most numerous of the feathered tribes. There, amongst brilliant creepers and dazzling sunshine, the "parrots swing like blossoms on the trees." The foot of the parrot is formed for climbing, being, as Linnaeus would say, _scansorial_, that is, with two toes forwards and two backwards. The strong hooked beak is also used as a third foot in climbing, very much as the long tail of a monkey helps him in flinging himself from one branch to another. They fly often in large flocks, and are killed and eaten as food. Indeed they are so destructive to the farmer's crops, that he kills them in self-defence. Do you know the pretty little Australian singing parrot, about as large as a yellow hammer, green and gold coloured? Well, I was told by a gentleman that he once ate part of a pudding which contained at least thirty of these little creatures, for each of which here one would have to pay heavily enough, and be only too anxious to take every care of afterwards to preserve it alive. The cockatoo is also found in New Holland, and is chiefly remarkable for its beautiful sulphur coloured crest. The finest macaws come from South America; they are larger than parrots, and have magnificent plumage of blue, crimson, green and yellow. Seen in their native land in large flocks they are said to resemble a flying rainbow. Lories are so called from their frequently repeating the word lory. The grey African Parrot is the best speaker, for I need not tell you how closely almost all kinds of parrot can imitate the human voice. None imitate so closely as this, the plainest in its personal appearance. It seems to take pains to learn, but prefers being taught by children. Very many amusing stories are told of its docility and sagacity. A very clever man tells of one that was introduced to Prince Maurice in a room in Brazil, where he was in company with several Dutchmen. The bird immediately exclaimed in the Brazilian language, "What a company of white men is here." Being asked, "Who is that man?" (pointing to the Prince) it answered, "Some general or other." When asked, "Where do you come from?" it replied, "From Marignan." "To whom do you belong?" "To a Portuguese." The Prince then asked, "What do you do there?" it answered, "I look after the chickens." The Prince, laughing, exclaimed, "You look after the chickens!" "Yes," says Poll, "I can, I know very well how to do it," clucking at the same time like a hen calling her brood. We are told also of a parrot that learned to repeat the Apostles' Creed quite perfectly, and on that account was bought by a cardinal for 100 crowns. The bite of a parrot is very violent, so that unless assured they are good tempered you will do well not to approach a strange bird too closely. The cause of this power in the beak is that, in order to enable it to climb about more easily, the upper mandible, or bone, instead of forming a continuation as it were of the skull bone, as in other birds, is united by a membrane which enables it to raise or depress the beak at its pleasure. This gives much greater force to its power of grasping. Parrots do not build nests nor hatch young in this country, but they thrive abundantly, and, when well treated, show no symptoms of pining. There are some very pretty little birds of the parrot tribe called love-birds, from their affectionate nature. They are quite worthy of the name, as they show the utmost tenderness for each other, both in health and sickness. Next: The Lapwing Previous: The Kestrel
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