Object Details
- author
- G. Felsenthal & Sons
- Description
- This white plastic chart was designed for the U.S. Army Signal Corps. It is a nomogram for finding the range correction in yards of a weapon, by lining up the meteorological correction as a percentage of the range and the range.
- On the left is a scale marked “Range Correction in Yds.” On the right is a scale marked “Percentage Meteorological Correction” and on the diagonal between the two is a scale marked “Range in Yds.” According to a label received with the object and stored in the accession file, the object was made in 1945.
- The meteorological correction is found from the temperature and wind speed using a related chart called a “sound velocity corrector” (for an example, see 1977.1141.42) .
- A mark on the object reads: Range Correction Chart PT-63/TSS-1.
- For an explanation of the mathematical theory of this kind of nomogram, see Lipka. For a similar device used for another purpose, see 1985.0636.01.
- References:
- Joseph Lipka, Graphical and Mechanical Computation. Part I. Alignment Charts, New York: John Wiley & Sons, 1921, pp. 65–
- 67.
- Accession file.
- Location
- Currently not on view
- Credit Line
- Gift of Ben Wharton Rau and Margery Felsenthal Rau
- 1945
- ID Number
- 1977.1141.43
- catalog number
- 336427
- accession number
- 1977.1141
- Object Name
- chart
- Physical Description
- plastic (overall material)
- Measurements
- overall: .1 cm x 26.6 cm x 20.3 cm; 1/32 in x 10 15/32 in x 8 in
- place made
- United States: Illinois, Chicago
- See more items in
- Medicine and Science: Mathematics
- Mathematical Charts and Tables
- Military
- Science & Mathematics
- National Museum of American History
- Subject
- Mathematics
- Record ID
- nmah_1213752
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746aa-a467-704b-e053-15f76fa0b4fa
