OF FISH IN GENERAL. 



Dr. Franklin's opinion. 



By this last experiment is corroborated Dr. 

 Franklin's opinion, " That water will convey 

 sound farther and more readily than air, He 

 thinks he has heard a smart stroke of two stones 

 together under water, his ear being also under 

 water in the same river, near a mile: how much 

 farther it may be heard he knows not, but sup- 

 poses a great deal farther, because the sound did 

 not seem faint, as if at a distance, like distant 

 sounds through the air, but smart and strong, as 

 if present just at the ear." 



Dr. Munro, afterwards, by means of a string 

 tied to the handle of the largest bell, and to an 

 inflated bladder, suspended that bell in a very 

 deep pool, six feet under the surface of the wa- 

 ter, and took hold of a cord twelve yards long, 

 which he had previously tied to the handle. He 

 then plunged under the water and pulled the 

 cord, and found the sound was instantly con- 

 veyed to his ears. In the last place, this gentle- 

 man thought of trying an experiment, to deter- 

 mine, whether air or water conveyed sound 

 quickest; but there being no lake near Edin- 

 burgh about eight hundred feet broad, he found 

 it impossible, independently of the difficulty of 

 constructing a proper apparatus, to perform the 

 experiment in a satisfactory and decisive way. 

 He, however, made the following experiment. 

 He charged three English pint bottles each 

 with about ten ounces of gunpowder. He then 

 inserted a tin tube four feet in length into 



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