In 1663 Edward Somerset, the ingenious Marquis of Worcester, contrived the first steam engine.
In 1742, when Benjamin Franklin invented the "Franklin Stove," or as it is sometimes called, the "Pennsylvania Fireplace," he refused to accept a patent on it, saying, "we enjoy great advantages from the inventions of others, so we should be glad of an opportunity to serve others by an invention of ours." An unscrupulous London manufacturer made some light changes in Franklin's stove, we are sorry to state, got a patent on it, and made a fortune from its sale.
An invention of the greatest utility was that brought out in 1788 by William Symington, a young Englishman, for a method of converting the reciprocating motion of an engine into the rotary.
About 1790, Claude Chappe, a Frenchman, while at school at Angers, contrived an apparatus consisting of a post bearing a revolving beam and circulatory arms with which he conveyed signals to three of his brothers who were at another school about half-a-league distant, who read the signals with a telescope. In 1792 the French Legislature voted Chappe 6000 francs ($1200) to enable him to make experiments in Paris. This invention of Chappe was called the "Semaphore Telegraph." Of course, misty or foggy weather would preclude the use of this signalling device. During the war between England and France an amusing incident is related of the use of the "Semaphore Telegraph." The admiral at Plymouth started a "wigwag message" to Whitehall, but was able to forward only part of the message, a thick fog gathering over a portion of the line and interrupting the message. The first part of the message was "Wellington defeated," which caused great distress and anxiety in London. The remainder of the message, "the French at Salamanca," received next day, changed the metropolitan sorrow into gladness.
About the year 1790, Signor Galvani, a professor of anatomy at Bologna, discovered the principle of Galvanic electricity. This was brought about in a very peculiar way. Mrs. Galvani was ill, and her physician prescribed some frog broth. Accordingly, frogs were procured, skinned, washed and laid on a table in the professor's laboratory, which seemed to serve a double purpose of a room for scientific and culinary operations. One of the professor's assistants was engaged in experimenting with a large electric machine which stood upon the same table, and had occasion to draw sparks from the machine. The wife of Galvani, who was present, was surprised to observe that every time he did so the limbs of the frogs moved as if alive. She immediately communicated this strange incident to her husband, who repeated the experiments with, of course, the same result. From this experiment was later developed the so-called zinc and copper wet jars used in the art.