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US Patent: 363,998
Spirit-Level
Patentee: George Palmer Evelyn (exact or similar names) - Pall Mall, Middlesex England USPTO Classifications: 33/389 Tool Categories: layout tools : levels : inclinometers Assignees: None Manufacturer: Not known to have been produced Witnesses: Wm. Clark W. James Skerten Donn Twitchell C. Sedgewick	Patent Dates: Applied: Mar. 01, 1886 Granted: May 31, 1887 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This design uses a graduated tube to indicate the inclination of the level. It is designed primarily for artillery work.

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