The First Year of ScienceSanborn, 1914 - 484 σελίδες |
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Σελίδα xii
... Leaves . Modified Leaves . Stems.— Structure of Stems ; Wood.— Sap.— Buds.— Roots . Underground Storage of Food.- Flowers.- Formation of Seeds . Dispersal of Seeds.- Exercises.- Classes of Plants.- Algæ . Fungi.- Mosses.- Ferns . Seed ...
... Leaves . Modified Leaves . Stems.— Structure of Stems ; Wood.— Sap.— Buds.— Roots . Underground Storage of Food.- Flowers.- Formation of Seeds . Dispersal of Seeds.- Exercises.- Classes of Plants.- Algæ . Fungi.- Mosses.- Ferns . Seed ...
Σελίδα 5
... leaves a black mark when rubbed on paper . All these properties dis- tinguish graphite from wood . Sulphur , or " brimstone , " is another common substance . It is dis- tinguished from wood and from graphite by the following properties ...
... leaves a black mark when rubbed on paper . All these properties dis- tinguish graphite from wood . Sulphur , or " brimstone , " is another common substance . It is dis- tinguished from wood and from graphite by the following properties ...
Σελίδα 53
... leaves Nitrogen . A small heap of red phosphorus is placed in the middle of a thin slice cut from a cork about three fourths of an inch in diameter . A wire pushed into the cork supports it . To hold the wire upright , we stick it into ...
... leaves Nitrogen . A small heap of red phosphorus is placed in the middle of a thin slice cut from a cork about three fourths of an inch in diameter . A wire pushed into the cork supports it . To hold the wire upright , we stick it into ...
Σελίδα 75
... leaves the coil , how is the room heated ? 6. Why does sprinkling a lawn in hot weather cool the air ? 7. If some liquid air is poured into an open beaker , its temperature does not rise above - 182.5 ° C. , no matter how warm the room ...
... leaves the coil , how is the room heated ? 6. Why does sprinkling a lawn in hot weather cool the air ? 7. If some liquid air is poured into an open beaker , its temperature does not rise above - 182.5 ° C. , no matter how warm the room ...
Σελίδα 111
... leaves , boughs , trunks , and roots , that collected FIG . 90 . Parallel Seams of Coal Outcropping on a Hillside . Clay beds lie under the coal . Here the other rock is sandstone ; often it is limestone as well . After Hopkins . under ...
... leaves , boughs , trunks , and roots , that collected FIG . 90 . Parallel Seams of Coal Outcropping on a Hillside . Clay beds lie under the coal . Here the other rock is sandstone ; often it is limestone as well . After Hopkins . under ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
acid alcohol ammonia animals bacteria becomes blood body boiling bones bottle burning calcium called capillary carbon dioxide carpels carried cells center of mass cerebrum changed chloride chlorophyll clothing coal cold color compounds consists contains cooled copper cord corpuscles cotyledons cubic dermis digestion diphtheria disease disinfectants dissolved earth electric epidermis esophagus fibers flame force freezing gases germs give glands glass gram heat hence hydrochloric acid hydrogen inches intestine iron juice kerosene layer light lime limestone liquid lungs magnet material melted mercury mercury oxide metal milk molecules motion mouth muscles nerve nitrogen object organs oxide oxygen pharynx phosphorus plants potassium pressure produce proteids rays removed rock salt seed skin small intestine soap sodium soil solid soluble solution steam stem stomach stove substances sugar sulphur sulphur dioxide surface temperature tissue tube vapor vessel weather weight wind wire wood
Δημοφιλή αποσπάσματα
Σελίδα 459 - Measures of Length 10 millimeters (mm) =1 centimeter cm 10 centimeters =1 decimeter dm 10 decimeters =1 meter m 10 meters =1 dekameter Dm 10 dekameters =1 hektometer Hm 10 hektometers =1 kilometer Km...
Σελίδα 459 - Measures of Weight 10 milligrams (mg) =1 centigram eg 10 centigrams =1 decigram dg 10 decigrams =1 gram g 10 grams =1 dekagram Dg 10 dekagrams =1 hektogram Hg 10 hektograms =1 kilogram Kg...
Σελίδα 459 - ... decimeter =1 liter (1.) 10 liters =1 dekaliter (dl.). 10 dekaliters =1 hectoliter (hi.). 10 hectoliters =1 kiloliter (kl.). 4. Weight. The gram is the weight of 1 cc water at 4° C.
Σελίδα 40 - ... hung up at one end, which when long enough will at last break with its own weight. Torricelli, however, in 1643, made an experiment which gave the true explanation of the pump-maker's difficulty. Filling with mercury a glass tube three feet in length, and closed at one end but open at the other ; he closed the open end with his finger, and inverted the tube in a basin filled with mercury. The mercury then sank in the tube to a given level, whilst above this level there was an empty space, which...
Σελίδα 471 - The major planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.
Σελίδα 396 - The nervous system is divided into two major categories: the central nervous system, consisting of the brain and spinal cord, and the peripheral nervous system, which is composed of all nerves that extend outward from the brain or spinal cord (Fig.
Σελίδα 467 - The Handbook of Chemistry and Physics, published by the Chemical Rubber Company, Cleveland, Ohio, contains tables of various properties of the elements.
Σελίδα 9 - LINEAR MEASURE 10 millimeters (mm.) = 1 centimeter 10 centimeters (cm.) — 1 decimeter 10 decimeters...
Σελίδα 60 - Fig. 25. noticeably for an increase in temperature and the amount of its expansion can be very readily determined. The ordinary thermometer consists of a glass tube of uniform bore which has a bulb at one end. The bulb and part of the tube are filled with mercury. The remaining part of the tube is empty, so that the mercury can freely rise or fall. When the temperature rises, the mercury expands and rises, when the temperature falls, the mercury contracts and sinks.
Σελίδα 11 - Tho symbol (Ib.) for it is equally general, and is derived from the Latin word libra. The old English pound, which is said to have been the standard of weight from the time of William the conqueror till that of Henry VII., was derived from the weight of 7,680 grains of wheat, all taken from the middle of the ear, and well dried.