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Σελίδα iii - Whether it be in the development of the Earth, in the development of Life upon its surface, in the development of Society, of Government, of Manufactures, of Commerce, of Language, Literature, Science, Art, this same evolution of the simple into the complex, through successive differentiations, holds throughout.
Σελίδα 71 - The specific gravity of any substance is the ratio of the weight of the substance to the weight of an equal volume of water.
Σελίδα 261 - J of the time to noon ? 172. What is the hour of day when f of the time past noon equals f of the time to midnight ? 173. If the time past noon increased by 40 min. equals | of the time from noon to midnight, what time is it ? 174. At what time between 5 and 6 o'clock are the hour and minute hands of a watch together ? At what time between 3 and 4 o'clock ? 175. A runs 12 rd. while B runs 11. In a race of 6 min., how much must B be given the start that they may reach the goal together ? 176. John...
Σελίδα 247 - If 2 men start from the same place, and travel in opposite directions ; one at the rate of 3| miles in an hour, and the other 4£...
Σελίδα 176 - The kingdom of science, then, cometh not by observation and experiment alone, but is completed by fixing the roots of observation and experiment in a region inaccessible to both, and in dealing with which we are forced to fall back upon the picturing power of the mind.
Σελίδα 257 - ... horses draw on the same road, a cubic foot of lead weighing 709.5 Ib. ? How many men whose average weight is 165 Ib. 12 oz. ? 19. A cubic foot of ice at the temperature of 32° weighs 57.5 Ib. How many tons can be stored in an ice-house that is 80 ft. long, 30 ft. 9 in. wide, and 20 ft. deep ? 20. How many paper boxes 3 in. long, 2 in. wide, and 2 in. deep, can be packed in a box 3 ft. long, 2 ft. wide, and iy 8 ft.

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