The whole art of making experiments in chemistry is founded on the principle: we must always suppose an exact equality or equation between the principles of the body examined and those of the products of its analysis. — Antoine Lavoisier Copy Share Image
We may lay it down as an incontestible axiom, that, in all the operations of art and nature, nothing is created; an equal quantity of matter exists both before and after the experiment; the quality and quantity of the elements… — Antoine Lavoisier Copy Share Image
The impossibility of separating the nomenclature of a science from the science itself, is owing to this, that every branch of physical science must consist of three things; the series of facts which are the objects of the science, the ideas which represent these facts, and the words by which these ideas are expressed. Like three impressions of the same… — Antoine Lavoisier Copy Share
I consider nature a vast chemical laboratory in which all kinds of composition and decompositions are formed. — Antoine Lavoisier Copy Share Image
Perhaps... some day the precision of the data will be brought so far that the mathematician will be able to calculate at his desk… — Antoine Lavoisier Copy Share Image
Experiments upon vegetation give reason to believe that light combines with certain parts of vegetables, and that the green of their leaves, and the… — Antoine Lavoisier Copy Share Image
“About eight days ago I discovered that sulfur in burning, far from losing weight, on the contrary, gains it; it is the same with phosphorus; this increase of weight arises from a prodigious quantity of air that is fixed during combustion and combines with the vapors. This discovery, which I have established by experiments, that I regard as decisive, has… — Antoine Lavoisier Copy Share
It required 85 parts by weight of oxygen and 15 parts of hydrogen to compose 100 parts of water. — Antoine Lavoisier Copy Share Image
It is impossible to disassociate language from science...To call forth a concept, a word is needed. — Antoine Lavoisier Copy Share Image
Sulfur, when burning, absorbs oxygen gas; the resulting acid is considerably heavier than the sulfur burned; its weight is equal to the sum of… — Antoine Lavoisier Copy Share Image
Since it is the very substance of the animal, it is the blood which transports the fuel.If the animal did not habitually replace, through… — Antoine Lavoisier Copy Share Image
If everything in chemistry is explained in a satisfactory manner without the help of phlogiston, it is by that reason alone infinitely probable that… — Antoine Lavoisier Copy Share Image
In performing experiments, it is necessary... that they be simplified as much as possible, and that every circumstance that could complicate the results should… — Antoine Lavoisier Copy Share Image
