Meccanica pratica per ragazzi

Le prime righe

p. 7 CHAPTER IToC ON TOOLS GENERALLY Judging from the favorable comments of educators, on the general arrangement of the subject matter in the work on "Carpentry for Boys," I am disposed to follow that plan in this book in so far as it pertains to tools. In this field, as in "Carpentry," I do not find any guide which is adapted to teach the boy the fundamentals of mechanics. Writers usually overlook the fact, that as the boy knows nothing whatever about the subject, he could not be expected to know anything about tools. To describe them gives a start in the education, but it is far short of what is necessary for one in his condition. If he is told that the chisel or bit for a lathe has a diamond point, or is round-nosed, and must be ground at a certain angle, he naturally wants to know, as all boys do, why it should be at that angle. So in the setting of the tools with relation to the work, the holding and manipulation of the file, of the drill for accurate boring, together with numerous little things, are all taken for granted, and the boy blunders along with the ultimate obp. 8ject in sight, without having the pathway cleared so he may readily reach the goal. Varied Requirements.—The machinist's trade is one which requires the most varied tools of all occupations, and they are by all odds the most expensive to be found in the entire list of vocations. Fig. 1. Bench Vise. Fig. 1. Bench Vise.ToList This arises from the fact that he must work with the most stubborn of all materials. He finds resistance at every step in bringing forth a product. List of Tools.—With a view of familiarizingp. 9 the boy with this great variety the following list is compiled, from which we shall select the ones essential in the initial equipment of a small shop. Vises.—One small, good vise