Social England : a record of the progress of the people in religion, laws, learning, arts, industry, commerce, science, literature and manners, from the earliest times to the present day . rgy, and thata given amount of energy can be converted into a definitequantity of licat. Joules earlier papers show that the idea of a mechanicalequivalent of heat had for sometime occupied his mind, yet, in1843, his announcement was fiirIrom being well received. Theleading physicists at hrst regardedit as the product of a countryyouths imagination. The Hrst toappreciate Joules work was SirWilliam Thumson, w
Social England : a record of the progress of the people in religion, laws, learning, arts, industry, commerce, science, literature and manners, from the earliest times to the present day . rgy, and thata given amount of energy can be converted into a definitequantity of licat. Joules earlier papers show that the idea of a mechanicalequivalent of heat had for sometime occupied his mind, yet, in1843, his announcement was fiirIrom being well received. Theleading physicists at hrst regardedit as the product of a countryyouths imagination. The Hrst toappreciate Joules work was SirWilliam Thumson, who was sixyears his junior. Others followedsuit, and came to see that thecountiy youth had unfolded tothem one of Natures grandestlaws. To Joule, in England, andVon Hehnholtz, in Germany, weowe the discovery of the lawof Conservation of Energy, alaw which states that energy isin the same degree indestructible and nncreatable as matter. In the light of our present knowledge, JoTiles work as awhole, the original of his ideas, the importance and generality ofhis discoveries, and their effect on the scientific world, place himside by side with Newton in the history of physical SU! H ,BY (NntlniKil Inytrait GnJIrrif.) The progress of chemistry is the best proof that science has Robertno countiy. The history of English chemistry cannot be under- chemi^trystood without continually referring to the discoveries of otherlands. At the time of which we write the atomic, theory ofDalton had already been confirmed by Gay-Lussacs discoveryand by Avogadros explanation of it, b}- the researches of 260 THE KE]V SIIIilT AXD THE NEW PATHS. (1832 Dulong and Petit on heat, and by those of Mitscherlich oncrvstaUine form. For the next few jears the chief advancein theoretical chemistry lay in the direction of determining thetrue formula. lor chemical substances, and of making these
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