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"This will be understood, when we consider that the reaction of b is just equal to the action of a, and that each of the other balls, in lke manner, ac, and react, o n the other, until the motion of a arrives at f, which, having no impediment, or nothing to act upon, is itself ut in motion." -Comstock 1850

Action and Reaction

"This will be understood, when we consider that the reaction of b is just equal to the action of a,…

The purification or concentration of a substance, the obtaining of the essence or volatile properties contained in it, or the separation of one substance from another, by such a process.

Tool for Distillation

The purification or concentration of a substance, the obtaining of the essence or volatile properties…

"Martini breech action (closed)." — Encyclopedia Britannica, 1893

Martini Breech

"Martini breech action (closed)." — Encyclopedia Britannica, 1893

"Martini breech action (open)." — Encyclopedia Britannica, 1893

Martini Breech

"Martini breech action (open)." — Encyclopedia Britannica, 1893

"Illustrating the path of a simple nervous reflex action." — Blaisedell, 1904

Reflex Action

"Illustrating the path of a simple nervous reflex action." — Blaisedell, 1904