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I shall never forget the circumstance of observing a pair of yellow-bellied woodpeckers,--the most rare and secluded, and, next to the red-headed, the most beautiful species found in our woods,--breeding in an old, truncated beech in the Beaverkill Mountains, an off-shoot of the Catskills. We had been travelling, three of us, all day in search of a trout lake, which lay far in among the mountains, had twice lost our course in the trackless forest, and, weary and hungry, had sat down to rest upon a decayed log. The chattering of the young, and the passing to and fro of the parent birds, soon arrested my attention. The entrance to the nest was on the east side of the tree, about twenty-five feet from the ground. At intervals of scarcely a minute, the old birds, one after another, would light upon the edge of the hole with a grub or worm in their beaks; then each in turn would make a bow or two, cast an eye quickly around, and by a single movement place itself in the neck of the passage. Here it would pause a moment, as if to determine in which expectant mouth to place the morsel, and then disappear within. In about half a minute, during which time the chattering of the young gradually subsided, the bird would again emerge, but this time bearing in its beak the ordure of one of the helpless family. Flying away very slowly with head lowered and extended, as if anxious to hold the offensive object as far from its plumage as possible, the bird dropped the unsavory morsel in the course of a few yards, and, alighting on a tree, wiped its bill on the bark and moss. This seemed to be the order all day,--carrying in and carrying out. I watched the birds for an hour, while my companions were taking their turn in exploring the lay of the land around us, and noted no variation in the programme. It would be curious to know if the young are fed and waited upon in regular order, and how, amid the darkness and the crowded state of the apartment, the matter is so neatly managed. But ornithologists are all silent upon the subject.

For example, the action of sulphuric acid upon soda results in nothing which makes the action conspicuous; if, however, litmus or phenolphthalein be added the change from blue to red in the first case, or from red to colourless in the second, renders the finishing-point evident. Some indicators cannot be added to the assay solution without spoiling the result; in which case portions of the assay solution must be withdrawn from time to time and tested. This withdrawal of portions of the assay solution, if rashly done, must result in loss; if, however, the solution is not concentrated, and if the portions are only withdrawn towards the end of the titration, the loss is very trifling, and will not show-up on the result. The usual plan adopted is to have a solution of the indicator placed in drops at fairly equal intervals distributed over a clean and dry white porcelain-plate: a drop or two of the solution to be tested is then brought in contact with one of these and the effect noted. Another plan is to have thin blotting-paper, moistened with a solution of the indicator and dried; a drop of the solution to be tested placed on this shows the characteristic change. When the assay solution contains a suspended solid which interferes with the test, a prepared paper covered with an ordinary filter-paper answers very well; a drop of the solution to be tested is placed on the filter-paper, and, sinking through, shows its effect on the paper below.

There is an old and strange Eastern allegory of a man wandering in the desert; he draws near to a grove of trees, when he suddenly becomes aware that there is a lion on his track, hurrying and bounding along on the scent of his steps. The man flees for safety into the grove; he sees there a roughly built water-tank of stone, excavated in the ground, and built up of masonry much fringed with plants. He climbs swiftly down to where he sees a ledge close on the water; as he does this, he sees that in the water lies a great lizard, with open jaws, watching him with wicked eyes. He stops short, and he can just support himself among the stones by holding on to the branches of a plant which grows from a ledge above him. While he thus holds on, with death behind him and before, he feels the branches quivering, and sees above, out of reach, two mice, one black and one white, which are nibbling at the stems he holds and will soon sever them. He waits despairingly, and while he does so, he sees that there are drops of honey on the leaves which he holds; he puts his lips to them, licks them off, and finds them very sweet.

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