A 19th century Victorian ' Captain Hill's Velocity Scale ' slide rule, likely for use with a cannon or similar heavy artillery of the period. Ivory faced mahogany construction, with brass sliding scale. Central pull-out rule, with another ivory plaque to rear for making notes in pencil. Measures approx; 48cm long.
A 19th century Victorian ' Captain Hill's Velocity Scale ' slide rule, likely for use with a cannon or similar heavy artillery of the period. Ivory faced mahogany construction, with brass sliding scale. Central pull-out rule, with another ivory plaque to rear for making notes in pencil. Measures approx; 48cm long.
.jpg?w=400?width=1600&quality=70 "Source: Christie's")
.jpg?w=400 "Source: Christie's")
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
