Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

2

Ou

S/O

Brevets

S/O

Description générale

Wood base/ brass index arm and parts/ ivory scales, labels, etc./ glass mirrors, lenses/mahogany wood case.

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

33,0 cm

Largeur

30,0 cm

Hauteur

10,0 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Exploration et levé

Catégorie

Mesure-angle

Sous-catégorie

S/O

Fabricant

Ou

SPENCER

Pays

England

État/province

Inconnu

Ville

London

Contexte

Pays

Inconnu

État/province

Inconnu

Période

Inconnu

Canada

Donated by Mrs. J. MacDonald of Cantley, Quebec. She says that it was used on the ship "Hope", which was an American ship that was involved in the Maritime Fur Trade along the northwest coast of North America and was also involved in the discovery of the Pacific Ocean. According to Mrs. MacDonald, this octant was used during the time of Captain J. E. Hill.

Fonction

An optical instrument used in navigation to determine longitude and latitude at sea by measuring the angle of the sun, moon or stars. This instrument was called an octant (also known as quadrant) because it was divided into an eighth of a circle.

Technique

Manufactured by Spencer, Browning & Co. Octants had more accurate construction than the previously used backstaffs. Scale reads from -10 degrees to 110 degrees and there is a smaller scale that goes from 0 to 20 units. Octants made it possible to view and measure the angle between two different objects.

Notes sur la région

Inconnu

Détails

Marques

Black incised lettering on ivory strip reading: 'SPENCER. BROWNING & CO. LONDON.'/ same strip also incised: 'H. DUREN NEW-YORK'/ incised black lettering possibly reading: 'SBR' ON SCALE/ black numbers & markings on scales/paper labels on case lid interior reading in part: 'S. THAXTER & SON/ IMPORTERSOF AND DEALERS IN/ NAUTICAL & SURVEYING/ INSTRUMENTS, NAUTICAL BOOKS ETC./ 125 STATE ST./ CORNERS OF BROAD ST./ BOSTON' & 'FROM/ H. DUREN/ DEALER IN CHRONO- METERS/ NO. 20 BURLING SLIP,/ BETWEEN FRONT AND WATER STREETS/ NEW YORK...' ETC.

Manque

none

Fini

Ebony wood/ brass coloured metal/ ivory/ mirrored, Clear,and green & dark tinted glass/ varnished wood case.

Décoration

S/O