THREE:A principle in mechanics may be known, and even familiar to a learner, without being logically understood; it might even be said that both theory and practice may be learned without the power to connect and apply the two things. A person may, for example, understand the geometry of tooth gearing and how to lay out teeth of the proper form for various kinds of wheels, how to proportion and arrange the spokes, rims, hubs, and so on; he may also understand the practical application of wheels as a means of varying or transmitting motion, but between this knowledge and a complete wheel lies a long train of intricate processes, such as pattern-making, moulding, casting, boring, and fitting. Farther on comes other conditions connected with the operation of wheels, such as adaptation, wear, noise, accidental strains, with many other things equally as important, as epicycloidal curves or other geometrical problems relating to wheels.
FORE:Rapping plates, draw-irons, and other details of pattern-making are soon understood by observation. Perhaps the most useful suggestion which can be given in reference to draw-irons is to say they should be set on the under or bottom side of patterns, instead of on the top, where they are generally placed. A draw-plate set in this way, with a hole bored through the pattern so as to insert draw-irons from the top, cannot pull off, which it is apt to do if set on the top side. Every pattern no matter how small, should be ironed, unless it is some trifling piece, with dowel-pins, draw and rapping plates. If a system of draw-irons is not rigidly carried out, moulders will not trouble themselves to take care of patterns.
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TWO:The meal was finished presently. Hetty caught the scent of cigarette smoke. The Countess lounged back in her chair, smoking too. She seemed perfectly self-possessed. She looked so easy and comfortable that Maitrank was filled with admiration.
TWO:V."Of course he did. I shouldn't wonder if he knew where that woman is hiding. I am still of opinion that if you can find Balmayne you can find the chief culprit. If you come to me tomorrow evening I may manage to hammer out something, but my brain is addled for the present. I have a theory of my own, but it sounds a little too cold at present."
TWO:"You poor little soul?" Hetty murmured. "Ah, you poor little soul!"
