Van Nostrand's Engineering Magazine, Volume 18D. Van Nostrand, 1878 |
Contents
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Common terms and phrases
action amount Aneroid angle applied axis body boiler bridge caisson carbon cast iron cent center of mass coal cofferdam compressed construction cost cylinder depth diagram diameter direction distance ductility earth electric energy engine equal experiments fact feet force foundations frame furnace girder given Gramme machine guncotton heat inches increase iron kinetic energy length light load machine magnet manganese masonry material means measure ment metal meters method miles momentum motion Nostrand's Magazine observations obtained ordinary oxide particle pass phosphorus piers pig iron piles pipe plates polygon position pounds pressure produced Prof quantity rails railway river sand sewers shaft ship side Siemens slag spring square square miles steam steel stone stress surface temperature thick tion tons traction engine tube unit velocity vertical VIS VIVA weight wheel wire wrought iron yards
Popular passages
Page 401 - The total energy of any material system is a quantity which can neither be increased nor diminished by any action between the parts of the system, though it may be transformed into any of the forms of which energy is susceptible.
Page 464 - Change of motion is proportional to the impressed force and takes place in the direction of the straight line in which the force acts.
Page 401 - In fact the doctrine of the Conservation of Energy is the one generalized statement which is found to be consistent with fact, not in one physical science only, but in all. When once apprehended it furnishes to the physical inquirer a principle on which he may hang every known law relating to physical actions, and by which he may be put in the way to discover the relations of such actions in new branches of science.
Page 331 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it is compelled by forces to change that state.
Page 22 - Now any system of forces in equilibrium may be represented in magnitude and direction by the sides of a closed polygon, a fact which follows at once from the doctrine of the parallelogram of forces.
Page 176 - Persians burn in the mountains,—it flames night and day, and is immortal, and not to be quenched! Upon something it must act and feed, — upon the pure spirit of knowledge, or upon the foul dregs of polluting passions.
Page 424 - ... bodies is proportional to the product of their masses divided by the square of the distance between them." "Is that all?" "That's enough! It took four hundred years to develop it.
Page 315 - The straight line or distance between the centres of the transverse lines in the two gold plugs in the bronze bar deposited in the Office of the Exchequer shall be the genuine standard of length at 62° F., and if lost it shall be replaced by means of its copies.
Page 572 - Hydrology of South Africa ; or, Details of the former hydrographic condition of the Cape of Good Hope, and of causes of its present aridity, with suggestions of appropriate remedies for this aridity.
Page 141 - The air itself is one vast library, on whose pages are for ever written all that man has ever said or even whispered. There, in their mutable but unerring characters, mixed with the earliest, as well as the latest sighs of mortality, stand for ever recorded, vows unredeemed, promises unfulfilled, perpetuating in the united movements of each particle, the testimony of man's changeful will.