Head boring, [i, 288].
with nut feed, [i, 291].
Heads, construction of, [i, 408].
double for planing machines, [i, 404].
Heads for match board grooves, [ii, 337], [338].
for tenoning machines, [ii, 345].
of the rapid machines, [i, 468].
planer, feed motions for, [i, 414].
safety devices for, [i, 413].
V-guideways for, [i, 414].
Headstock lathe, construction, [i, 153].
of engine lathes, [i, 134].
grinding lathes, [i, 200].
special lathe, [i, 144].
Heat, [ii, 410].
conversion of, into work, [ii, 411].
latent, [ii, 410].
radiation of, [ii, 412].
Heaters for fire engines, [ii, 432], [433].
Heating and knocking, [ii, 164].
feed-water, [ii, 370].
showing the causes of, [ii, 168].
Heavy oil for hot bearings, [ii, 386].
Heel tool, [i, 330].