Catalogue No: | C1410 |
---|---|
Category: | General Purpose |
Object Type: | Indicator/Instrument |
Object Name: | Pole Finding Paper |
Part No: | Not Known |
Serial No: | Not Known |
Manufacturer: | GEC |
Division: | |
Platform(s): | |
Year of Manufacture: | circa 1902 |
Dimensions: |
Width (mm): 95 Height (mm): 70 Depth (mm): 3 Weight (g): 9 |
Location: | Cupboard CJ (Display 5) [Main Store] |
G.E.C.
POLE FINDING PAPER
For Electrical Works, Wireless Works, Garages, etc.
(Guaranteed All-British Manufacture).
Treble Impregnated & Highly Sensitive. Suitable for all Climates.
Instructions.- Tear off a section of the paper and moisten it with water (or apply moisture from the tongue). The two wires from Dynamo, Mains or Battery should then be pressed upon it for a few seconds, keeping the wires at the same time about ⅛-in apart (for high voltages a ¼ to ½-in apart). The wire that leaves a Red Mark on the paper is the Negative Pole. The wires should be bright and clean when making the test’.
This is essentially blotting paper dipped in a solution of sodium sulphate to which a few drops of phenolphthalein has been added.
A search of the Internet reveals such paper described in a book of 1902 but the actual date of this book is unknown.