-40%
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER
NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER

NICE 18TH CENTURY NAVAL OFFICER'S FOLDING SECTOR RULER

$ 8.18

Availability: 96 in stock
  • Condition: In good condition for age with a great patina.
  • Type: Ornaments & Bowl Fillers
  • All returns accepted: Returns Accepted
  • Date of Creation: Pre-1800
  • Material: oxbone and brass
  • Return shipping will be paid by: Buyer
  • Item must be returned within: 14 Days
  • Restocking Fee: No
  • Original/Reproduction: Original
  • Region of Origin: Europe
  • Refund will be given as: Money Back

    Description

    Description
    Here is a n
    ice late 18th century, pre 1900 in date naval officer's folding sector ruler in good original condition. The oxbone surface has a nice patina from age with a brass hinge. A n
    umber of scales are inscribed upon the instrument which facilitate various mathematical calculations. It was used for solving problems
    in
    proportion
    ,
    multiplication
    and
    division
    ,
    geometry
    , and
    trigonometry
    , and for computing various mathematical functions, such as
    square roots
    and
    cube roots
    .
    Its several scales allowed easy and direct solutions of prob
    lems in
    gunnery
    ,
    surveying
    and
    navigation
    . Originally from Leith docks, Edinburgh Scotland from a maritime naval collection. Measuring 12 inches long when folded out straight
    .
    Please care to look at my other items currently on Ebay.
    I combine items for shipping.
    This item will be airmailed from Scotland
    .