11.(Pg. [56]) How may a pair of scales be false, and yet appear to be true?
12.(Pg. [56]) If the fulcrum be removed from the centre of gravity, how may the equilibrium be restored?
13.(Pg. [56]) How is this exemplified by [fig. 3. plate 4]?
14.(Pg. [56]) What proportion must the weights bear to the lengths of the arms?
15.(Pg. [57]) On what principle do we weigh with a pair of steelyards, and what will be the difference in the motion of the extremities of such a lever?
16.(Pg. [58]) How is this exemplified by [fig. 4. plate 4]?
17.(Pg. [58]) What line is described by the ends of a lever? [fig. 4. plate 4].
18.(Pg. [58]) How many kinds are there; and in the first how is the fulcrum situated?
19.(Pg. [58]) When may the fulcrum be so situated that this lever is not a mechanical power, and why?
20.(Pg. [59]) What is represented by [fig. 5. plate 4]?