Describes new machinery at U.S. mint in Philadelphia. Refers JH to G. F. Dunning (visiting England) and Franklin Peale (chief coiner) for more information. U.S. mint uses humid assay of silver. Facts about gold assays.
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The Sir John Herschel Collection
The preparation of the print Calendar of the Correspondence of Sir John Herschel (Michael J. Crowe ed., David R. Dyck and James J. Kevin assoc. eds, Cambridge, England: Cambridge Univ. Press, 1998, viii + 828 pp) which was funded by the National Science Foundation, took ten years. It was accomplished by a team of seventeen professors, visiting scholars, graduate students, advanced undergraduates, and staff working at the University of Notre Dame.
The first online version of Calendar was created in 2009 by Dr Marvin Bolt and Steven Lucy, working at the Webster Institute of the Adler Planetarium, and it is that data that has now been reformatted for incorporation into Ɛpsilon.
Further information about Herschel, his correspondence, and the editorial method is available online here: http://historydb.adlerplanetarium.org/herschel/?p=intro
No texts of Herschel’s letters are currently available through Ɛpsilon.
Describes new machinery at U.S. mint in Philadelphia. Refers JH to G. F. Dunning (visiting England) and Franklin Peale (chief coiner) for more information. U.S. mint uses humid assay of silver. Facts about gold assays.
Differing opinions among manufacturers of minting machinery. Compares fly-press at Royal Mint with equipment at Philadelphia. Over nine million coins struck in past six months, with £630,000 per week at maximum capacity, three times more than under old Mint system. Problems with introducing new machinery while production pressure continues. Five new coin weighing machines are 'greatest improvement' at Mint.