Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

6

Ou

S/O

Brevets

S/O

Description générale

.1 &.1PT LID ARE CAST BRASS;.1 HAS GLASS VIEWING WINDOWS/.2 BRASS STAND & FITTINGS; METAL BOX;.3 BRASS & SYNTHETIC CONSTRUCTION; GLASS OPTICS;.4 TEST PENDULUM MADE FROM ALLOY OF 10% ALUMINUM & 90% COPPER; FITTED WITH AGATE KNIFE EDGE/.5 PROBABLY AS FOR.4; ALSO GLASS TUBE LEVEL IN BRASS CASING/.6 WOOD HANDLE & BRASS

Dimensions

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

Longueur

57,5 cm

Largeur

44,0 cm

Hauteur

55,3 cm

Épaisseur

S/O

Poids

S/O

Diamètre

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Volume

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Lexique

Groupe

Physique

Catégorie

Géophysique

Sous-catégorie

S/O

Fabricant

Ou

Saegmuller

Pays

United States of America

État/province

District of Columbia

Ville

Washington

Contexte

Pays

Canada

État/province

Inconnu

Période

THIS INSTRUMENT USED BETWEEN 1902-C.1948 (WITH930234)

Canada

BUILT SPECIFICALLY FOR USE OF DOMINION OBSERVATORY STAFF, PRINCIPALLY DR. OTTO KLOTZ, MR. F.A. MCDIARMID & MR. A.H. MILLER. IT WAS BUILT UNDER THE SUPERVISION OF THE U.S. COAST & GEODETIC SURVEY, AND IS MODELLED AFTER THE 1/2-SECOND PENDULUM APPARATUS USED IN WASHINGTON SINCE 1891. IT WAS USED IN CANADA C.1902-C.1948

Fonction

TO DETERMINE THE MEASUREMENT OF GRAVITY

Technique

DEV'D X.1889-1890 BY T.C. MENDENHALL & U.S. COAST & GEODETIC SURVEY, WASHINGTON DC. MENDENHALL PENDULUM APPARATUS IS A 1/2-SECOND PENDULUM APPARATUS, PROVIDING RELATIVE VALUES FOR GRAVITY. CONSIDERED PORTABLE, ACCURATE, MORE RAPID & CONVIENENT THAN OLDER PENDULUM PIER-TYPE METHODS, THE MENDENHALL & SIMILAR PENDULUM-TYPE INSTRUMENTS REPLACED AS STANDARD BY GRAVIMETERS IN 1940S.

Notes sur la région

Inconnu

Détails

Marques

.1 MFR'S PLATE SCREWED TO.1 READS: 'Geo. N. Saegmuller/ Washington, D.C.'. TUBE LEVEL MOUNTED ABOVE WINDOW & VACUUM PUMP VALVE IS GRADUATED BUT NOT LABELLED/.1PT CASE: 'PROPERTY OF/ DOMINION OBSERVATORY/ OTTAWA' STENCILLED IN GREEN ON 2 SIDES & LID OF CASE; '14' HANDPAINTED IN OFF-WHITE ON CRATE LID. 'Reading arc' HANDWRITTEN IN PENCIL IN ONE CORNER INSIDE CASE/.2 FLASH APPARATUS STAMPED ON ONE END PANEL: 'FAUTH & Co. WASHn D.C./ 2220'. CRUDE DIRECTIONAL ARROWS HANDPAINTED IN GOLDTONE PAINT ON EACH OF 3 LEGS OF BASE/.2PT CASE: '20' HANDPAINTED IN WHITE ON CASE TOP. MAILING LABEL ON CASE SIDE REPRODUCED IN SUPP.INFO.

Manque

2 AGATE KNIFE EDGE FITTINGS, SET IN SOLID METAL PLATES, ON WHICH PENDULUMS HANG IN .1; PORTABLE AIR PUMP FOR .1; 3 FOOT PLATES FOR .1; TELESCOPES FOR .1-.2; OIL LAMP FOR .2; THERMOMETER FOR .4; MISC. MINOR PTS. From CA of 12/06/2001 by David Daley: No - Complete

Fini

MOST PIECES PAINTED BLACK WITHBRIGHT LACQUERED FITTINGS. GLASS WINDOWS & LENS ON.3..4 DUMMY PENDULUM IS GOLD-PLATED; HOUSED WITHIN CLEAR PLEXIGLASS CASE. WOODEN CASE FOR.1 STAINED RED-BROWN ON EXTERIOR;.2-.3 CASE IS VARNISHED

Décoration

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