The metadata below describe the original scanning. Follow the "All Files: HTTP" link in the "View the book" box to the left to find XML files that contain more metadata about the original images and the derived formats (OCR results, PDF etc.). See also the
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"The substance of this book was given in a series of lectures to the staff of Barclay's bank and an abstract was published in their magazine from May to August [1919]"--p. 10