First Course in General ScienceH. Holt Company, 1916 - 607 σελίδες |
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acetylene alcohol ammonia amount animal atmosphere average bacteria barometer body boiler boiling point bottle bulb burner burning burning point calcium carbide candle carbon dioxide cause cent chemical chemical elements chimney clouds coal cold contains cool cubic cylinder disease distillate electric energy engine Exercise Fahrenheit fire flame flashing point flask foot-candles freezing fresh air fuel furnace gas mantle gasoline glass heat hydrogen illuminating kerosene lamp light limewater liquid machine means melting mercury milk mixture moisture mold oxygen passes perature petroleum pipes plant portion pressure produce protein pump radiator rain refrigerator relative humidity removed saturated side smoke soil steam storm stove substances sugar supply surface tank temperature thermometer Tropic of Cancer tube United usually vacuum valve ventilation volatile matter water vapor weather weight wind wire wood yeast
Δημοφιλή αποσπάσματα
Σελίδα 543 - Powers, are certain simple instruments, commonly employed for raising greater weights, or overcoming greater resistances, than could be effected by the natural strength without them. These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Σελίδα 391 - England, it was not until the latter half of the nineteenth century that the double standard was abolished.
Σελίδα 583 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq.
Σελίδα 584 - TIME 60 seconds (sec.) = 1 minute (min.) 60 minutes = 1 hour (hr.) 24 hours = 1 day (da.) 7 days = 1 week (wk.) 365 days = 1 common year...
Σελίδα 416 - The dominating theory of disease was the humoral, which has never since ceased to influence medical thought and practice. According to this celebrated theory the body contains four humors — blood, phlegm, yellow bile, and black bile — a right proportion and mixture of which constitute health; improper proportion and irregular distribution, disease.
Σελίδα 191 - To explain the construction of the common barometer, and to shew that the mercury is sustained in it by the pressure of the air on the surface of the mercury in the basin.
Σελίδα 583 - CUBIC MEASURE 1728 cubic inches (cu. in.) = 1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...
Σελίδα 583 - Weight. 16 drams (dr.) = 1 ounce (oz.). 16 ounces — 1 pound (Ib.). 100 pounds — 1 hundredweight (cwt.). .2000 pounds - 1 ton (t.).
Σελίδα 122 - But we are probably not far from the truth if we say that...
Σελίδα 391 - I saw with wonder that my material contained many tiny animals which moved about in a most amusing fashion; the largest of these (A, Fig. 1) showed the liveliest and most active motion, moving through the water or saliva as a fish of prey darts through the sea; they were found everywhere, although not in large numbers.