SPANISH = ITALIAN Language-Phone Method Send for testimonials and booklet. IF;ructive Scientific Papers ON TIMELY TOPICS Price 10 Cents each by mail THE SHRINKAGE AND WARPING CONSTRUCTION OF AN INDICAT ING OR RECORDING TIN PLATE DIRECT-VISION SPECTROSCOPES. DYNAMO AND MOTORCOMBINED. Price 10 Cents each by mail MUNN a COMPANY, scientific american, 1908-02-15
SPANISH = ITALIAN Language-Phone Method Send for testimonials and booklet. IF;ructive Scientific Papers ON TIMELY TOPICS Price 10 Cents each by mail THE SHRINKAGE AND WARPING CONSTRUCTION OF AN INDICAT ING OR RECORDING TIN PLATE DIRECT-VISION SPECTROSCOPES. DYNAMO AND MOTORCOMBINED. Price 10 Cents each by mail MUNN a COMPANY, scientific american, 1908-02-15
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