Scientific Arnerican APRIL 25, 1903. … isthe most simple, compact and power- best that are manufactured. Channels, apparatus for forming navigable, States Patent Office, Washington, D. ful ever constructed for practical pur- General office, BRAINTREE, MASS. er tetas PR AEE S sae Rie aes 725,203 poses. Needs less attention, is less lia-…
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