Object Details
- Joseph T. Ryerson & Son, Inc.
- Description
- Companies seeking to provide customers with advertisements they might consult repeatedly sometimes distributed convenient mathematical tables. This is an example of one of these. The small white plastic card has figures printed in black. The table gives approximate conversions between the figures obtained from several different methods of measuring the hardness of nickel alloy steels. The numbers are associated with the Brinnell, Vickers or Forth, Rockwell, and Shore scales, as well as the tensile strength.
- One edge of the table contains a scale 10 centimeters long, divided to millimeters. The other contains a scale 4 inches long, divided to 1/20th of an inch.
- The reverse of the table describes the advantages of Ryerson certified steels. It is marked in part: 75C 2-39. It is also marked: PRINTED (/) IN (/) U.S.A.
- Location
- Currently not on view
- Credit Line
- Gift of I. Bernard Cohen
- 1939
- ID Number
- 1988.3076.03
- catalog number
- 1988.3076.03
- nonaccession number
- 1988.3076
- Object Name
- mathematical table
- Physical Description
- plastic (overall material)
- Measurements
- overall: .2 cm x 6.8 cm x 12.3 cm; 3/32 in x 2 11/16 in x 4 27/32 in
- See more items in
- Medicine and Science: Mathematics
- Mathematical Charts and Tables
- Science & Mathematics
- National Museum of American History
- Subject
- Mathematics
- Manufacturing
- Record ID
- nmah_1213746
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746aa-a461-704b-e053-15f76fa0b4fa
