Only $ 740.00

b. August 10, 1806 and d. February 24, 1871

German mathematician and hydraulic engineer. His chief accomplishments were in hydraulics and mechanics. He introduced a new system of mine-surveying and advanced axonometry. By his introduction of the “coefficient of resistance” into mathematical calculations, and his discovery of the “incomplete contraction” of water according to the nature of the orifice whence it flows, he greatly simplified and advanced the science of hydraulics. The most important of his numerous works are “Lehrbuch der Ingenieurund Maschinenmechanik” (1845-’54) and “Der Ingenieur” (1848).

Laborious still, he taught the early mind,
And urg’d to manners meek and thoughts refin’d;
Truth he impress’d, and every virtue prais’d;
While infant eyes in wondering circles gazed;
The worth of time would day by day unfold,
And tell them every hour was made of gold.

—Timothy Dwight

He widened knowledge and escaped the praise;
He wisely taught, because more wise to learn;
He toiled for Science, not to draw men’s gaze,
But for her lore of self denial stern.
That such a man could spring from our decays
Fans the soul’s nobler faith until it burn.

—Jeffries Wyman

Only $ 740.00