. Bulletin - United States National Museum. Science. Figure 46.âPagl from pattern book by James H. ChappcU dealing witli liis splierical s\sicin uJ lailuiing. Patent issued January 18, 1834 (restored patent 7962X). The historian engaged in restoration and preserva- tion is ill advised to bypass the Patent Office. Early industrial techniques such as charcoal burning (fig. 51) and bark grinding (fig. 52), vehicles of all types from fire engines (fig. 53) to gigs (fig. 54), agricul- tural implements by the score (fig. 55), and a variety of other tools are represented by watercolor drawings or spe
. Bulletin - United States National Museum. Science. Figure 46.âPagl from pattern book by James H. ChappcU dealing witli liis splierical s\sicin uJ lailuiing. Patent issued January 18, 1834 (restored patent 7962X). The historian engaged in restoration and preserva- tion is ill advised to bypass the Patent Office. Early industrial techniques such as charcoal burning (fig. 51) and bark grinding (fig. 52), vehicles of all types from fire engines (fig. 53) to gigs (fig. 54), agricul- tural implements by the score (fig. 55), and a variety of other tools are represented by watercolor drawings or specifications or both. Thomas W. Pryor's im- proved bark mill of 1805 is an excellent example of the patent record as an illustrative and descriptive document. The drawing (fig. 52) shows a typical, horse-powered, bark mill complete with the miller and his horse, while the specification outlines the process. Bark, after being prepared in the usual manner is thrown into a Horizontal Separating Machine, which is a CN'lindrical Revolutionary Wire finer or coarser as may be foimd most advantageous with Interstices to produce long or short filaments of Bark . . ; the separated Bark falls into a Chest below the Separating machine, throwing out at the end. The unsmashed lumps or pieces of Bark which may not be sufficiently ground . . are placed in a Common Bark mill and after being reground is thrown into the Separating machine and goes through the foregoing process. 144 BULLETIN 24 1 : CONTRIBUTIONS FROM THE MUSEUM OF HISTORY .â XND TECHNOLOGY. 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; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
