Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
3 lbs. 84- Figure 43.—The screw a modification of the in-clined plane.—The screw is an inclined plane wound spirally around Fig. 42. … a spindle, and holds the same relation to the ordinary inclined planethat a spiral staircase does to a straight one. In the figure a part ofthe inclined plane L, forming the screw, is extended off to the left atthe top of the spindle, instead of off to the right at the bottom, Avhichinverts it. The…
Physics · Astronomy
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