Scientific American. FEBRUARY 5, 1881.] 93 … arnishing, etc., etc. 12mo, : . . $1 ‘‘BLAKE’S CHALLENGE” ROCK BREAKER. Rose.—The Slide Val ve Practically Explained. Em- JAS. BEGGS & CO., Selling Agts. , 8 Dey Street, bracing simple and complete Practical Demonstrations C@- SEND FOR PRICED CATALOGUE. of the operation of each element ina Slide…
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