General Information

Serial #

D 25938

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

CAST IRON BASE/ METAL FRAMED CASING COVER WITH 5 GLASS SIDES/ METAL PARTS, INCLUDING BRASS/ PAPER CHART.

Dimensions

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

Length

32.3 cm

Width

18.9 cm

Height

24.5 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

Short Mason

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Unknown

Period

Unknown

Canada

Unknown

Function

AN INSTRUMENT THAT MEASURES AND RECORDS ATMOSPHERIC PRESSURE THROUGH ITS EFFECT ON AN ANEROID, A METAL CHAMBER PARTIALLY EXHAUSTED OF AIR. THE MICROBAROGRAPH IS A MORE SENSITIVE TYPE OF BAROGRAPH, DESIGNED TO RECORD SMALL FLUCTUATIONS IN AIR PRESSURE.

Technical

THE MICROBAROGRAPH HAS A HIGHER BANK OF ANEROID CHAMBERS THAN THE BAROGRAPH TO AMPLIFY THE MOVEMENT OF THE PEN & A MORE SENSITIVE PEN MECHANISM, IN ORDER TO INCREASE THEINSTRUMENT'S SENSITIVITY. THIS INSTRUMENT HAS A TIME MARKER IN THE CASING TOP, WHICH WHEN DEPRESSED CAUSES THE PEN TO MAKE A VERTICAL LINE ON THE CHART.

Area Notes

Unknown

Details

Markings

While lettering on base plate reading 'MICRO-BAROGRAPH/BY/SHORT & MASON/LONDON/MADE IN GREAT BRITAIN/NO. D 25938'/brass part incised 'CHART NO 130'.

Missing

INK BOTTLE From CA of 12/01/1993 by Tony Missio: No - Complete

Finish

BLACK WRINKLE FINISHED CASING, BASE PLATE, MECHANISM MOUNT/PLATED, BRUSHED METAL, AND BRASS COLOURED PARTS.

Decoration

BEVELLED EDGES ON GLASS.