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KaG1p's Cork .Matress-We have NJ certificate ot three gentlemen, Sh0VE messed the experiment made with KnaRnI Cork Mattress. The certificate states s the experiment was entirely satisfactog- The mattress weighed 26lbs. and slstan' a man from Fort Independence to Las Wharf Though the sea was considenl| agitated, the mattress sailed faster thanu boat which accompanied him, and Nlig. wetting his head.

 An experiment was made with the s1 at the swimming school on ChHs river a day or two since, and was equallgFS y isfaetory. Our informant states, thatthl persons lay upon it, and as many oAa as could conveniently surround 1t endeala ed to press 1t into the water, without sl ceeding.

 If these things are 50, {and we haze {. ! reason 10 doubt the accuracy of our ln lna nation, the value of the grated cork ma ress will be inestimable. Bostos eouf'