and other En, avings. 600 pages, q realized large sums from their patents. foiling the work more securely than any other Chuck or for fifteen years (government fee $60). The five and octavo. ice, $2. More than FIFTY THOUSAND inventors have availed ten year patents may be extended to the term of… … THE SCIENTIFIC AMERICAN wi¥ be sent one year The Jaws are of Cast Steel, the Screws are of Log the beginning. If the parties consulted are honorable The population of Great Britain is 81,000,000; of France, Moor Iron, Case Hardened, and the Nuts of Malleable and one copy of SCIENCE RECORD FOR 1878,…
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