. The clays and clay industry of New Jersey. Clay; Clay industries. PLATE Fig. 1. Showing the progressive changes in burning a black clay low in iron oxide to a buff-colored Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ries, Heinrich, 1871-1951; Kümmel, Henry Barnard, 1867-; Knapp, George N. Trenton, N. J. , MacCrellish & Quigley, printers

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Keywords: ., bookcentury1900, bookdecade1900, bookpublishertrent, bookyear1904