Lyman C.—Your land-turtle will eat pieces of pear or sweet apple, bread, cake, and many other things. It will also live many months without eating at all. You can keep it in a box, and it will be happier if you give it a little earth to dig in. If the earth is deep enough, it will make a burrow and sleep in it until next spring. We knew a little girl who received a present of two land-turtles, which she placed in the yard. In a few days she was unable to find them, and gave them up for lost. The next spring, six months afterward, she was digging in her flower beds, when, to her astonishment, she found her two lost pets, who opened their eyes on being disturbed, and crawled sluggishly out of their hole. They had been asleep all through the cold weather, for turtles are very long lived, and they can easily give a whole winter to a single nap. Rev. Mr. Wood, in a note to White's Natural History of Selborne, gives a very interesting account of a tame turtle which he allowed to crawl about his study. This turtle showed a great genius for climbing, and at one time actually succeeded in scrambling upon a footstool. He says: "Its food consisted of bread and milk, which it ate several times a day, drinking the milk by scooping up some of it in its lower jaw, and then by throwing its head back the milk ran down its throat."
Young Chemist.—Spread on your paper first a solution of iodide of potassium, then a solution of nitrate of silver. Iodide of silver forms, and saturates the paper. The excess of nitrate of silver and the heavy yellow powder which forms are now washed off, and the paper is ready for the camera. The picture may be developed by a solution of gallic acid mixed with a very small quantity of an aqueous solution of acetic acid and nitrate of silver. The picture is fixed by washing with hyposulphite of soda. If you wish to derive any pleasure from photography, you would better drop the old-fashioned paper process, and turn your attention to ferrotypes, or negatives on glass, as with them good results are more easily obtained than with paper.
We acknowledge very pretty and neatly written letters from St. Clair Nichol, Listowel, Ontario, and Charles L. Benjamin (nine years old), Washington, D. C., both containing correct information respecting Sir Rowland Hill.
Clarissa H. H.—Your answer to No. 4 of the mathematical puzzles is right. If you look carefully you will discover why the others are wrong.
G. A. Page sends correct answers to Nos. 1, 3, and 4 of the mathematical puzzles in our second number; also to numerical charade. Many thanks to "an instructor and lover of young people" for her kind note. We are sorry it is anonymous.