Boys' own book : a complete encyclopedia of athletic, scientific, outdoor, and indoor sports (1881)
Clarke, William, 1800-1838 · New York : J. Miller, Publisher · leaf 482
SPERING GALLERY IN THE DOME OF ST. PAUls. THE SPEAK-ING TRUMPET. THE INVISIBLE GIRL, AND THE AMUSEMENT SHR OCCASIONED.—CHARADES. OTHER ACOUSTIC AMUSEMENTS. MYS-TERIOUS SOUNDS. CREAKING SHOES. Ok their return to the Lodge, Mr. Seymour proceeded withthe explanation of the Whispering Gallery in St.… … He explained it as follows: M shows the situation of the mouth of the speaker, andE that of the ear of the hearer. Now, since sound radiatesin aU directions, a part of it will proceed directly from m toE, while other rays of it will proceed from m to -w, and fromM to s, &c.; but the ray that…
Amusements · Games · Sports
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