LIST OF ILLUSTRATIONS

[p. ix]

FIG. PAGE
1.Bench vise[8]
2.Pipe grip for vise[9]
3.Swivel vise[10]
4.Speed lathe[11]
5.Calipers[12]
6.Engine lathe[13]
7.Center gage[14]
8.Pocket screw and wire gage[15]
9.Handy bench vise[16]
10.Combination square[17]
11.Uses of the combination square[18]
12.A quick adjusting micrometer[19]
13.Universal bevel protractor[20]
14.Uses of universal bevel protractor[21]
15.Grindstone truing device[22]
16.Set of tools and case[23]
17.The work bench[24]
18.Hook tool[28]
19.Parting tool[28]
20.Knife tool[28]
21.Right-hand side tool[28]
22.Internal tool[28]
23.Left-hand side tool[28]
24.Tool for wrought iron[29]
25.Tool for cast iron[29]
26.End view of drill[31]
27.Side view of drill[31]
28.Hack-saw frame[35]
29.Hack-saw blade[35]
30.Plain hook tool[38]
31.Plain straight tool[38]
32.Proper angles for tools[39]
33.Angles for tools[39] [p. x]
34.Angles for tools[39]
35.Set of the bitt[40]
36.Correct angle[41]
37.Wrong angle[41]
38.Too low[42]
39.Improper set[42]
40.Internal set[43]
41.Set for brass[43]
42.Surface gage[44]
43.Uses of surface gage[46]
44.Rounded surface[49]
45.Winding surface[49]
46.Hexagon nut[51]
47.Laying off hexagon nut[51]
48.Cutting key-way[52]
49.Key-seat rule[54]
50.Filing metal round[54]
51.Filing metal round[54]
52.Making a round bearing[55]
53.Making a round bearing[55]
54.Cross section of file[56]
55.Files[58]
56.Correct file movement[59]
57.Incorrect file movement[60]
58.Belt lacing[69]
59.Belt lacing[69]
60.Belt lacing[69]
61.Belt lacing[69]
62.Bevel gears[71]
63.Miter gears[71]
64.Crown wheel[71]
65.Grooved friction gears[71]
66.Valve[71]
67.Cone pulleys[71]
68.Universal joint[71]
69.Trammel[73]
70.Escapement[73]
71.Device for holding wheel[73] [p. xi]
72.Rack and pinion[73]
73.Mutilated gears[73]
74.Shaft coupling[73]
75.Clutches[75]
76.Ball and socket joints[75]
77.Fastening ball[75]
78.Tripping devices[75]
79.Anchor bolt[75]
80.Lazy tongs[75]
81.Disc shears[75]
82.Wabble saw[76]
83.Continuous crank motion[76]
84.Continues feed[76]
85.Crank motion[76]
86.Ratchet head[76]
87.Bench clamp[76]
88.Helico-volute spring[77]
89.Double helico-volute[77]
90.Helical spring[77]
91.Single volute-helix[77]
92.Flat spiral or convolute[77]
93.Eccentric rod or strap[77]
94.Anti dead-centers for lathes[77]
95.Plain circle[95]
96.Ring[96]
97.Raised surface[96]
98.Sphere[96]
99.Depressed surface[96]
100.Concave[97]
101.Forms of cubical outlines[98]
102.Forms of cubical outlines[98]
103.Forms of cubical outlines[98]
104.Forms of cubical outlines[98]
105.Shading edges[99]
106.Shading edges[99]
107.Illustrating heavy lines[100]
108.Illustrating heavy lines[100]
109.Lines on plain surfaces[101] [p. xii]
110.Lines on plain surfaces[101]
111.Illustrating degrees[102]
112.Section lining[103]
113.Drawing an ellipse[104]
114.Perspective at angles[106]
115.Perspective of cube[107]
116.Perspective of cube[107]
117.Perspective of cube[107]
118.Protractor[108]
119.Using the protractor[109]
120.Section-lining metals[110]
121.Spur gears[122]
122.Miter gear pitch[123]
123.Bevel gears[124]
124.Laying of miter gears[125]
125.Sprocket wheel[128]
126.Simple lever[129]
127.Lever action[130]
128.The pulley[132]
129.Change of direction[133]
130.Change of direction[133]
131.Steam pressure[135]
132.Water pressure[135]
133.Prony brake[141]
134.Speed indicator[142]

[p. 1]

PRACTICAL MECHANICS FOR BOYS

INTRODUCTORY[ToC]

The American method of teaching the mechanical arts has some disadvantages, as compared with the apprentice system followed in England, and very largely on the continent.

It is too often the case that here a boy or a young man begins work in a machine shop, not for the avowed purpose of learning the trade, but simply as a helper, with no other object in view than to get his weekly wages.