CONTENTS

15. Instrument for the construction of similar plane
figures Geometric shapes existing in two dimensions. . . . . . . . . . . . . . . . . . . . 31
16. Transferring a similar plane figure to
another location . . . . . . . . . . . . . . . . . . 35
17. Transferring similar solid figures Three-dimensional geometric bodies. . . . 37
18. Instrument for the construction of similar solid
figures . . . . . . . . . . . . . . . . . . . . . . 37
19. Continuation. Construction of solid similar
mirror images . . . . . . . . . . . . . . . . . . . 45
Construction of a wheel with a specific
number of slanted teeth that engage with a given
screw Likely referring to a worm gear mechanism. . . . . . . . . . . . . . . . . . . 49
20. Bodies on a movable plane can be
moved by the slightest force . . . . . . . . . . . 55
21. Difference between the movement of water
and of solid bodies. Aids for moving
the latter . . . . . . . . . . . . . . . . . . . . . 57
22. A load can be moved without a machine only by
a force equal to it . . . . . . . . . . . . . . . . 59
23. Upward movement of a cylinder on an inclined
plane . . . . . . . . . . . . . . . . . . . . . . . 61
24. Gravity (inclination) and center of gravity.
Point of suspension and equilibrium . . . . . . . . 63
25. Distribution of loads on supports: General principles . 71
26. Distribution of a load on 2–4 supports when the
ends of the load are supported . . . . . . . . . . 73
27. Distribution of the load when one of its ends is
supported . . . . . . . . . . . . . . . . . . . . . 75
28. Change in distribution depending on the position of the
support. Effect of the support as a lever fulcrum . 77
29. Distribution of the load among the moving forces.
Division and unification of forces . . . . . . . . 79
30. Distribution of a load on supports when the ends
are not supported . . . . . . . . . . . . . . . . . 81
31. Distribution of a load added to a given
load . . . . . . . . . . . . . . . . . . . . . . . . 85