. Annual report for the year ended June 30 .... United States National Museum. INVESTIGATION AND RESEARCH 89 facturing techniques. His paper on the beginnings of cheap steel was pubUshed in Museum Bulletin 218. He is collaborating with Burton Faust, of the Patent Office, in connection with researches into the history of saltpetre mining and processing in the United States, and with Lawrence A. Johnson, of Syracuse, , who is exploring the history of the tools used in the preparation and cutting of the sugar loaf. Dr. Charles O. Houston, Jr., associate curator, has begun prepara- tion o
. Annual report for the year ended June 30 .... United States National Museum. INVESTIGATION AND RESEARCH 89 facturing techniques. His paper on the beginnings of cheap steel was pubUshed in Museum Bulletin 218. He is collaborating with Burton Faust, of the Patent Office, in connection with researches into the history of saltpetre mining and processing in the United States, and with Lawrence A. Johnson, of Syracuse, , who is exploring the history of the tools used in the preparation and cutting of the sugar loaf. Dr. Charles O. Houston, Jr., associate curator, has begun prepara- tion of a definitive chronologj" of innovation in the coal industry. Agriculture and forest products.—Acting curator E. C. Kendall presented a paper on 18th-century American plows and their European origins at a meeting of the Agricultural History' Society in Louisville, Hy. The study is based on the Museum's collection of. 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 United States National Museum. [Washington] : Smithsonian Institution
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