The fireside university of modern invention, discovery, industry and art for home circle study and entertainment . , tripled, etc. Note also that Nitrogen itself isjust fourteen times heavier than Hydrogen, the standard. Did the chemists next experiment with compounds of threeElements ? Yes. They found that when they took compounds of threeElements apart, there was always at least enough of each tomake its relative weight once in Hydrogen. If there were morethan enough, it was twice enough, thrice enough. For instance,Bromine, an Element, weighs parts of Hydrogen. MixBromine, Silver and
The fireside university of modern invention, discovery, industry and art for home circle study and entertainment . , tripled, etc. Note also that Nitrogen itself isjust fourteen times heavier than Hydrogen, the standard. Did the chemists next experiment with compounds of threeElements ? Yes. They found that when they took compounds of threeElements apart, there was always at least enough of each tomake its relative weight once in Hydrogen. If there were morethan enough, it was twice enough, thrice enough. For instance,Bromine, an Element, weighs parts of Hydrogen. MixBromine, Silver and Chlorine together into a new thing; takethem apart, and out of the mass there would come parts ofBromine, parts of Chlorine, and parts of Silver. Itwas found that any two of three such ingredients would them-selves combine in the exact way they had clung to or amalga-mated with the third. But they might, like Oxygen and Nitro-gen, have several ways of uniting, by the doubling, tripling, etc.,of one of the Elements. In this way you see, discovery of therelation of Elements rapidly Figs. 86 and 87. APPARATURES FOR DETERMINING MOLECULAR WEIGHT. CHEMISTRY. 233 What did Dalton and Avogadro do with these laws? They deduced the theory that the Elements are themselvescomposed of molecules or combinations of atoms. These atomshave shapes, weights, affinities of their own. They are all alikein their own molecule. But they readily leave their own mole-cule to attach themselves to a molecule of another kind ofatoms ; or a whole molecule may attach itself to another mole-cule ; or several molecules may fasten on a larger molecule,making a conglomerate mass ; or certain molecules may refuseto fasten to certain other molecules. But usually the moleculeof a compound like sugar is composed of atoms from *he mole-cules of the Elements, and these atoms have come together in anew molecule, which to all intents seems as important as theoriginal molecule, and crystalli
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