240, _241_; focus of, 236; rectilinear, _245_; spherical aberration in, 243. Levers, signal, colours of, 230. Speed governors, 67, _68_, _69_; Hartwell, 70; marine, 71. Speed of motor cars, 110. Spot, blind, in eye, 251; yellow, in eye, 251. Spring balance for watches.

• The doctor further in.
• Is brewed in winter, when all the.
• Boats, then into canoes, and finally.
• Justly remarked, "a slander well hoed grows.