General Information

Serial #

N/A

Part Number

1

Total Parts

3

AKA

N/A

Patents

N/A

General Description

GLASS STALAGMOMETER TUBES/ WOOD CASE WITH SIMULATED LEATHER (PAPER) COVERING, WITH BRASS HARDWARE & PLUSH FABRIC LINING.

Dimensions

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

Length

31.4 cm

Width

12.0 cm

Height

4.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Hydrostatics & fluid mechanics

Sub-Category

N/A

Manufacturer

AKA

Unknown

Country

Germany

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Nova Scotia

Period

20TH CENTURY

Canada

INSTRUMENT WAS PROBABLY PERSONAL EQUIPMENT OF DR. E.G. YOUNG, FIRST DIRECTOR OF INSTITUTE FOR MARINE BIOSCIENCE OPERATED IN HALIFAX BY NATIONAL RESEARCH COUNCIL OF CANADA.

Function

STALAGMOMETER IS USED TO MEASURE SURFACE TENSION OF LIQUIDS USING "DROP WEIGHT" METHOD. SAMPLE OF LIQUID IS PLACED IN UPPER TUBE SO AS TO FILL TUBE TO PREDETERMINED LEVEL, & ALLOWED TO RUN DOWN LOWER TUBE UNTIL DROP FALLS OFF. GIVEN NUMBER OF DROPS IS WEIGHED TO INDICATE SURFACE TENSION.

Technical

EXAMPLE OF INSTRUMENT USED IN MEASURING SURFACE TENSION BYDROP METHOD PUBLISHED BY PROFESSOR F.(?) TRAUBE IN 1887. FIRST STALAGMOMETER APPEARS TO HAVE BEEN MADE IN 1863 BY WILHELMY BUT THEORY WAS NOT FULLY UNDERSTOOD. EQUATIONS TO GIVE SURFACE TENSION WERE FOUND EMPIRICALLY IN 1919 BY HARKINS & BROWN.

Area Notes

Unknown

Details

Markings

.1 INCISED SCRIPT READING "Professor F.(?) Traube's/ Stalagmometer/ Tropfz f. Wasser=77,50/ 20C." & "I"/ INCISED UNNUMBERED SCALE WITH MAJOR DIVISIONS DIVIDED INTO 5 SUBDIVISIONS/ GOLD STAMPED "Stalagmometer" ON CASE TOP EXTERIOR.

Missing

APPEARS COMPLETE EXCEPT FOR DISINTEGRATING CASE.

Finish

COLOURLESS & TRANSPARENT GLASS/ BLACK CASE WITH PURPLE LINING & BRASS COLOURED HARDWARE

Decoration

WHITE CORD EDGING INSIDE CASE BOTTOM/ INDENTED LINING IN BOX COVERING