ORIGIN OF REFLECTING LIGHTHOUSES.

In the last century, at a meeting of a society of mathematicians at

Liverpool, one of the members proposed to lay a wager, that he would

read a paragraph of a newspaper, at ten yards' distance, with the light

of a farthing candle. The wager was laid, and the proposer, having

covered the inside of a wooden dish with pieces of looking-glass,

fastened in with glaziers' putty, placed his reflector behind the

candle, and won his wager. One of the company marked this experiment

with a philosophic eye. This was Captain Hutchinson, the dockmaster,

with whom originated the reflecting lighthouses, erected at Liverpool in

1763.

------------------

Invention and Discovery: Curious Facts and Characteristic Sketches · 第 121 / 188 题