![](https://coimages.sciencemuseumgroup.org.uk/74/294/medium_thumbnail_1990_0459__0002_.jpg)
Hall's nautical slide rule, with descriptive pamphlet, in cardboard case, the instrument is made in boxwood, with two slides, length 13 1/2" nearly, inscribed:- "J.H. Steward, Strand, London"
Hall's nautical slide rule, with descriptive pamphlet, in cardboard case, the instrument is made in boxwood, with two slides, length 13 1/2" nearly, inscribed:- "J.H. Steward, Strand, London"