Note 1 — HOME STUDIES IN CHEMISTRY AND PHYSICS.
Reading edition
“De Saussure,” sō-sür, Horace Benedict. (1740-1799.) A Swiss naturalist who traveled extensively and made valuable contributions to science. Much of his time and attention were given to mountain researches. He constructed the best hygroscope, the instrument which indicates a change in the degree of moisture in the atmosphere. The cyanometer, an instrument for measuring the degrees of blueness in the sky, was also invented by him.