Accession No

0458

Brief Description

Gunter scale; English; second half 18th century

Origin

England

Maker

Class

mathematics

Earliest Date

1750

Latest Date

1800

Inscription Date

Material

wood (boxwood); metal (brass, steel)

Dimensions

length 611mm; breadth 47mm

Special Collection

Robert Whipple collection

Provenance

Gifted to Robert Stewart Whipple from T.H. Court on 05/3/1929.

Inscription

Description Notes

Boxwood Gunter scale with bevelled edge. Obverse scales:
1. Scale of inches divided [0] - 24 numbered by 1 subdivided to 0.1
2. Scales of inches and half inches with transversals for divisions to hundredths
3. Scale of ‘Lea’ divided [10] - [0] - 200 numbered by 10, 10 - 0 subdivided to 1
4. Scale of rumbs marked ‘Rum’ divided [0] - 8 numbered by 1 subdivided to 0.25
5. Scale of ‘M.L.’ divided [10] - [0]- 90 numbered by 10, [10] - 0 subdivided to 1
6. Scale of rumbs marked ‘rum’ divided [0] - 8 numbered by 1 subdivided to 0.25
7. Scale of chords marked ‘Cho’ divided [0] - 90 numbered by 10 subdivided to 1
8. Scale of ‘P’ divide [1] - [0] - 10, numbered by 1, 1- 0 subdivided to 0.2
9. Scale of ‘M.L’ divided [0] - 60 numbered by 10 subdivided to 1
10. Scale of sines, divided [0] - 90 numbered by 10 (to 60), 0 - 20 subdivided to 1, 20 - 60 subdivided to 2
11. Scale of secants marked ‘Sec’ divided [10] - 70 numbered by 10. 20 - 50 subdivided to 2, 50 - 70 subdivided to 1
12. Scale of chords marked ‘Cho’ divided [0] - 90 numbered by 10 subdivided to 1
13. Scale of tangents marked ‘Tan’ divided [0] - 80 numbered by 10 subdivided to 1
14. Scale of semi-tangents marked ‘S.T’ divided [0] - [1]60 numbered by 10 subdivided to 2

Reverse, log scales of:
1. Semi-rumbs marked ‘S.R’ divided 1 - 8 numbered by 1, 2- 7 subdivided to 0.25
2. ‘T.R.’ divided 1 - 4 and back to 7, numbered by 1 subdivided to 0.25
3. Numbers marked ‘Num’ divided 1 - 10[0] numbered 1, 2, 3 ...1[0], 12, 2[0], 3[0] ... 10[0]; 1 - 2 subdivided to 0.05, 2-10 subdivided to 0.1, 10-20 subdivided to 0.5, 20-100 subdivided to 1
4. sines marked ‘Sin’ divided 1 - 90 numbered 1, 2 ... 10, 20 ... 80; 1 - 4 subdivided to 5’, 4 - 10 subdivided to 10’, 10 - 20 subdivided to 30’, 20 - 50 subdivided to 1˚, 50 - 80 subdivided to 2˚
5. versed sines marked ‘V.S’ divided [0] - [1]65 numbered by 10; 10- 20 subdivided to 5, 20 - 90 subdivided to 2, 90 - 160 subdivided to 1˚, 60 - 65 subdivided to 30’
6. tangents, marked ‘tan’ divided 1 - 45 and back to 89 numbered 1, 2, 3... 10, 20, 30, 40, 45, 50, 60, 70, 80; 1 - 4 subdivided to 5’, 4 - 10 subdivided to 10’, 10 - 20 subdivided to 30’, 20 - 45 subdivided to 1˚
7. meridional parts marked ‘MER’ divided [0] - 85 numbered by 10; 0 - 70 subdivided to 1˚, 70 - 85 subdivided to 30’

Also scale of equal parts marked ‘E.P’ divided [10] - 0 - [1]80 numbered by 10

Condition fair (large crack towards one end); complete

References

Events