Felsenthal Graphical Firing Table
date: label: date made
content: ca 1960
name: label: maker
content: Felsenthal Instrument Co.
notes: label: Description
content: This two-sided wooden instrument has a white coating and a plastic indicator with wooden edges held together by six brass rivets. The rule was designed by Felsenthal Instrument Company of Chicago. According to the accession file, this rule was made around 1960 at the Fort Sill Bookstore in Oklahoma. It is used to position a 155 mm howitzer armed with high-explosive M107 shells. One side is used for charges of 4, and the other side is used for charges of 5.
label: Description
content: Both sides have scales for deflection correction or drift, the number of mils needed to move the explosion 100 meters, range, elevation, fuze setting, change in angle elevation needed to produce a change in range, and correction to fuze setting.
label: Description
content: One side is marked: HOW 155mm (/) 155AH2H3M107 (/) CHARGE 4 (/) FSN 1220-937-8282. The other side is marked: HOW 155mm (/) 155AH2H3M107 (/) CHARGE 5 (/) FSN 1220-937-8282. Compare to 2005.2071.02 and to the graphical site tables, 1977.1141.26, and 1977.1141.27. Unlike this object, all three instruments have scales on slides.
label: Description
content: References: U.S. Marine Corps, "Chapter 7: Firing Tables, Section II: Graphical Firing Tables," <i>Tactics, Techniques, and Procedures for Field Artillery Manual Cannon Gunnery</i>, Field Manual No. 6–40/MCWP 3–16.4 (Washington, D.C., 23 April 1996); Elizabeth R. Dickinson, "The Production of Firing Tables for Cannon Artillery," U.S. Army Ballistic Research Laboratory, Report No. 1371 (Aberdeen (Md.) Proving Ground, November 1967), 59–65, 75–80; accession file.
label: Location
content: Currently not on view
place: label: place made
content: United States: Oklahoma, Fort Sill
topic: label: Subject
content: Mathematics
label: Subject
content: Rule, Measuring
label: Subject
content: Artillery
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Science & Mathematics
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content: Scale Rules
creditLine: label: Credit Line
content: Gift of Ben Wharton Rau and Margery Felsenthal Rau
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1977.1141.25
label: catalog number
content: 336409
label: accession number
content: 1977.1141
objectType: label: Object Name
content: scale rule
label: Object Name
content: rule
physicalDescription: label: Physical Description
content: wood (overall material)
label: Physical Description
content: metal (overall material)
label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: .9 cm x 45.6 cm x 11.1 cm; 11/32 in x 17 15/16 in x 4 3/8 in