There is scarcely a branch of physical or chemical science to which Gay-Lussac did not contribute some important discovery.
Hydrocyanic acid was discovered by Scheele; but its nature and chemical properties were first investigated by Gay-Lussac.
Two young physicists, Biot and Gay-Lussac, were chosen to carry out the investigations.
In Europe, Gay-Lussac's hydrometer and tables are chiefly used for alcoholometric testing.
Thenard's memoir was followed by a communication of fundamental importance from Gay-Lussac .
Makers of chlorate of potash and cyanide of potassium are profiting largely by the discoveries of Scheele, Gay-Lussac, and others.
Gay-Lussac he placed "at the head of the living chemists of France."
Impure spirits of 40° Gay-Lussac, and not water, should be used as a menstruum for the salt of copper.
In the year 1805 he and Gay-Lussac were in Paris, engaged in their experiments on the compression of air.
Gay-Lussac and Humboldt, however, affirm, that it contains nearly the usual proportion of air.