14 ([return])
[ See Newton's laws in the Glossary at the end of the book.]
15 ([return])
[ See “Aerofoil” in the Glossary.]
16 ([return])
[ “In effect” because, although there may be actually the greatest proportion of keel-surface In front of the vertical axis, such surface may be much nearer to the axis than is the keel-surface towards the tail. The latter may then be actually less than the surface in front, but, being farther from the axis, it has a greater leverage, and consequently is greater in effect than the surface in front.]