A WEEKLY JOURNAL OF PRACTICAL INFORMATION ART SCIENCE MECHANICS CHEMISTRY AND MANUFACTURES. Vol. XLNo. 3. [NEW SERIES. [POSTAGE PREPAID. The Adulteration of Soft Soap. AMERICAN INIIIISTRIEBNo. 2. BY HAMILTON IL WICKS. THE UTILIZATION OF GRAPHITE. TEE MANUFACTURE OF LEAD PENCILS. iitrt„„nar, scientific american, 1879-01-18

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