Search: letter in document-type 
Herschel, John in correspondent 
Hume, Joseph Burnley in correspondent 
Sorted by:

Showing 12 of 2 items

From:
Joseph Burnley Hume
To:
Sir John Herschel
Date:
[25 April 1853]
Source of text:
TxU:H/M-0284; Reel 1087
Summary:

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.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Joseph Burnley Hume
Date:
[1853-6]
Source of text:
TxU:H/L-0200; Reel 1054
Summary:

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.

Contributor:
John Herschel Project