The manual training school, comprising a full statement of its aims, methods, and results, with figured drawings of shop exercises in woods and metals . Fig. 50. €huck-cavity may be made to take the form of (6), showing aconvex outline; or concave outline as shown in (c), where itis a hemispherical cavity; or (c?), where it has just the form tosupport without injury the first piece (a). When the piece isaccurately carried by the chuck, the double cylindrical openingmay be cut out of the original piece, leaving but a skeleton ofmaterial in the finished piece. This exercise is very interesting,a
The manual training school, comprising a full statement of its aims, methods, and results, with figured drawings of shop exercises in woods and metals . Fig. 50. €huck-cavity may be made to take the form of (6), showing aconvex outline; or concave outline as shown in (c), where itis a hemispherical cavity; or (c?), where it has just the form tosupport without injury the first piece (a). When the piece isaccurately carried by the chuck, the double cylindrical openingmay be cut out of the original piece, leaving but a skeleton ofmaterial in the finished piece. This exercise is very interesting,and admits of great variation. 64 FIRST YEAR OF MANUAL TRAINING SCHOOL. [Chap, H,. Fig. 51. No. 15. [Fig. 51.) Ring with octagonal section. This figure, like the last one, shows a half-section of the ring. (a) shows that the ring, is partlyformed from the face of a blockscrewed to the face-plate by thecenter screw. Three of the facesof the ring are finished, and twomore, the inner and the outer, areaccurately turned. Perhaps theouter one should be defined by afaint line before it is removedfrom the screw, (ft) shows thata chuck has beenmade to receive it after it is turned roundsand that the original back of the block has been cut away, andthat the ring has been finished. No. 16. Napkin ring. This should be shown in half-section and in half-projection. It is treated like the ring 51; that is, it is held by the screw-center till the interiorand the greater part of the exterior is finished, and then it round, and the finished end is inserted in a chuck. Forthis exercise use close-grained hard wood, and polish, stain, orshellac the result. No. 17. (Fi
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmanualt, bookyear1906
