Saw of the Saw-fly, with Rasps shown in the Cross-lines.
Portion of the Saw-fly's comb-toothed Rasp, and Saw.
CONVERSATION II.
Uncle Philip tells the Children about Grasshoppers and Bees, that bore Holes with a Gimlet.
"Well, Uncle Philip, here we are again, to hear more about the tools that animals work with; we have seen in the bark of trees, and old wooden posts, little holes as round as a gimlet could make, and we have been thinking whether any of these little creatures have augers and gimlets, as well as saws. Do you know of any of them that can bore holes?"
"Oh yes, boys; I know of more than one that can bore as smooth and round a hole as any carpenter you ever saw. There are some of the grasshoppers that have an excellent gimlet. The contrivance has five pieces in it; two of the pieces make a case to keep the augers in, two more are the augers or borers, and the other is a piece between the two borers on which they slide; this piece has a ridge on each side of it, and the augers have a groove which exactly fits the ridge. Besides this, each auger ends in a knob, and that knob has teeth all around it. Here is a picture of it."