A matchless source of interest in this most effective and essential of all the sciences, is, that it seems capable of an infinite progress. The chemical philosopher cannot even conceive any limit to its variety, multitude, or utility of purpose. The more he discovers, the more he finds is still to be discovered. Every new property awakens him to the existence of some other property, more capacious and more profound. Every difficulty mastered, only leads him towards some deeper and more tempting problem. And, in addition to the ardour derived from this triumph of our intellectual ambition--as if all the incentives that can act upon man were expressly accumulated upon this pursuit--there is no science in which the actual triumphs are more directly connected with personal opulence. The invention of a new acid or alkali might create unbounded wealth. The discovery of a new principle of the most vulgar use--for tanning leather, for extracting oils, for strengthening soap, for purifying tallow, might place the discoverer in possession of wealth beyond the dreams of avarice. But a loftier ambition may still find its field in this science. A chemical discovery might change the face of the world. Gunpowder had already changed the whole form of European society. A chemical discovery might give us the power of managing at our will the storm and the lightning, of averting the pestilence, or of ensuring the fertility of the soil, and the regularity of the seasons. The Divine intention in placing us here, was evidently the perpetual exercise of the human understanding. For that purpose were given the wants, and the remedies of the wants, of man; for that purpose all sciences are perhaps inexhaustible; but of all, the most palpably inexhaustible, the most teeming with immediate results, and the most remedial as to human necessities, is Chemistry--fitted by its extent to supply the largest proportion of human objects, by its power to excite the most eager inquiry, and by its richness to reward the intelligent labour of man, to the last ages of the world. Antoine Laurent Lavoisier was born in Paris in 1743, the son of one of the "farmers-general." As the office was nearly hereditary, and was proverbially connected with great opulence, the son of the rich functionary was highly educated. But science soon attracted all his study, and, devoting himself especially to chemistry, he made himself conspicuous among the leading philosophers of his time.