Barograph

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Ingenium, 1987.0510.001
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OBJECT TYPE
MERCURY TUBE/PHOTOGRAPHIC/KEW
DATE
1867–1885
ARTIFACT NUMBER
1987.0510.001
MANUFACTURER
Unknown
MODEL
KEW
LOCATION
England

More Information


General Information

Serial #
N/A
Part Number
1
Total Parts
7
AKA
N/A
Patents
N/A
General Description
SLATE BASE/ METAL PARTS (BRASS WITH SOME GOLD?)/ GLASS LENSES & BAROMETER TUBE/ CERAMIC DIAL

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length
190.0 cm
Width
35.9 cm
Height
162.0 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Meteorology
Category
Atmospheric pressure measurement
Sub-Category
N/A

Manufacturer

AKA
Unknown
Country
England
State/Province
Unknown
City
Unknown

Context

Country
Canada
State/Province
Ontario
Period
C. 1887 UP TO 1940
Canada
INSTRUMENT USED TO RECORD ATMOSPHERIC PRESSURE AT CANADA'S FIRST METEOROLOGICAL OBSERVATORY, PROVIDING A CONTINUOUS PHOTOGRAPHIC RECORD OF PRESSURE CHANGES FOR RESEARCH PURPOSES RATHER THAN WEATHER PREDICTION.
Function
INSTRUMENT WHICH MEASURED ATMOSPHERIC PRESSURE BY MEANS OF A MERCURY BAROMETER & RECORDED THE RESULTS ON PHOTOGRAPHIC PAPER.
Technical
LATER (C. 1867) FORM OF KEW TYPE PHOTOGRAPHIC BAROGRAPH,ORIGINALLY DEVELOPED IN 1840'S AFTER INVENTION OF PHOTOGRAPHY. IT CONSISTS OF MERCURY TUBE MOUNTED VERTICALLY ON TABLE, & SEVERAL LENSES TO MAGNIFY & FOCUS LIGHT OF FLAME WHICH ILLUMINATES TUBE & CREATES IMAGE ON LIGHT SENSITIVE PAPER ON CLOCK CONTROLLED DRUM. THIS BAROGRAPH WAS BUILT BETWEEN 1867 AND 1873. THE ROYAL SOCIETY IN LONDON PROPOSED THE BUILDING OF THREE TYPES OF RECORDING INSTRUMENT, INCLUDING THE PHOTOGRAPHIC BAROGRAPH AND THERMOGRAPH (1987.0509), FOR BRITISH OBSERVATORIES IN 1867 AND BY LATER THAT YEAR EXAMPLES OF THESE INSTRUMENTS WERE OPERATING AT KEW AND OTHER OBSERVATORIES (REFS. 1-2). IN 1873, THE CANADIAN BAROGRAPH AND THERMOGRAPH WERE AT THE KEW OBSERVATORY IN LONDON FOR VERIFICATION (REF. 3).
Area Notes
Unknown

Details

Markings
Incised lettering on drum reading 'BAROGRAPH'/ incised lettering on lens reading 'BAROGRAPH/ H. ANDERSON & SONS/ LONDON'/ clock mechanism incised 'R. MUNRO'
Missing
From CA of 10/26/1993 by Tony Missio: Undetermined
Finish
BLACK BASE/ LACQUERED? & BLACK PAINTED BRASS & METAL PARTS/ COLOURLESS TRANSPARENT & TRANSLUCENT GLASS/ WHITE CERAMIC/ BROWN STAINED & VARNISHED WOOD
Decoration
BLACK LINE DESIGN ON CALIBRATED DIAL

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Unknown Manufacturer, Barograph, between 1867–1885, Artifact no. 1987.0510, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1987.0510.001/

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