“when come the calm, mild days.” _put on their storm-doors_: In modern bee-hives there is a movable board in front upon which the bees alight when entering the hive; this can be so turned as to make a large doorway for the summer, and a small entrance for the cold winter. _whole drove of forty-six woodchucks_: The author at one time had forty-six inhabited woodchuck holes on his farm. PAGE 72 _as Bobolink among the reeds of the distant Orinoco_: The bobolink winters even farther south--beyond the banks of the Amazon. _to sleep until dawn of spring_: What is the name for this strange sleeping? What other American animals do it? Name three. PAGE 73 _frogs frozen into the middle of solid lumps of ice_: Of course, this was never done intentionally: each time the frogs were forgotten and left in the laboratory, where they froze. PAGE 74 _they seem to have given up the struggle at once ..._: This may not be the explanation. One of the author’s friends suggests that it may have been caused by exposure, due to their having been frightened in the night from their usual bed and thus forced to roost where they could until morning. PAGE 75 _timothy_: “Herd’s-grass” or “English hay”--as it is sometimes called in New England. _plenty for the birds_: What are the “weeds” made for? You growl when you are set to pulling them in the garden. What are they made for? Can you answer? CHAPTER X TO THE TEACHER Perhaps you are in a crowded school-room in the heart of a great city. What can you do for your pupils there? But what _can’t_ you do? You have a bit of sky, a window surely, an old tin can for earth, a sprig of something to plant--and surely you have English sparrows behind the rain pipe or shutter! You may have the harbor too, and water-front with its gulls and fish, and the fish stores with their windows full of the sea. You have the gardens and parks, burial-grounds and housetops, bird stores, museums--why, bless you, you have the hand-organ man and his monkey; you have--but I have mentioned enough. It is a hungry little flock that you have to feed, too, and no teacher can ask more. FOR THE PUPIL PAGE 76 _An English sparrow_: Make a long and careful study of the sparrows that nest about you. If you live in the country try to drive them away from the bluebird house and the martin-boxes. The author does not advise boys and girls to do any killing, but carefully pulling down a sparrow’s nest with eggs in it--if you are _sure_ it is a sparrow’s nest--is kindness, he believes, to the other, more useful birds. Yet only yesterday, August 17th, he saw a male sparrow bring moth after moth to its young in a hole in one of the timbers of a bridge from which the author was fishing. It is not easy to say just what our duty is in this matter. PAGE 77