Miniature Double Sided Pocket Barometer Altimeter Thermometer Compass Compendium
FOR SALE IS A VERY SMALL ANTIQUE ANEROID DOUBLE SIDED POCKET BAROMETER COMPENDIUM. CONSISTS OF A BAROMETER & ALTIMETER WITH A THERMOMETER & COMPASS ON THE REVERSE SIDE.
IN FULL WORKING ORDER WITH A GILDED BRASS CASING & CONTAINED IN IT'S ORIGINAL LEATHER CASE. THE INSTRUMENT IS MUCH SMALLER THAN USUAL WITH A DIAMETER OF ONLY 4.6 cm (1 13/16") & A DEPTH OF 2.0 cm (3/4"). THE CASING IS GILDED BRASS IN GOOD CONDITION WITH SLIGHT WEAR.
THE BAROMETER IS IN FULL WORKING ORDER & READILY PASSES THE'PLASTIC BAG TEST'. THE DIAL IS SILVERED WITH FINE BLACK LETTERING WITH SLIGHT DISCOLOURATION IN THE CENTRE. IT IS ENGRAVED'Compensated' (for temperature).IT HAS A FINE BLUED STEEL POINTER. THERE ARE TWO SCALES ON THE DIAL. THE INNER RING READS FROM 21 TO 31 REGISTERING THE ATMOSPHERIC PRESSURE.
THE OUTER RING READS FROM 0 TO 10,000 FEET REGISTERING THE ALTITUDE ABOVE SEA LEVEL. THE FRONT BEZEL ROTATES TO ADJUST THE ALTITUDE SCALE. THE GLASS IS BEVELLED AND APPEARS TO BE ORIGINAL WITH NO DAMAGE. THE REVERSE HAS A DECORATIVE SILVERED METAL BASE-PLATE ENGRAVED -10 TO +140 DEGREES FAHRENHEIT TO WHICH IS ATTACHED A THERMOMETER WITH A CURVED CYLINDRICAL ELONGATED RESERVOIR. IN THE CENTRE IS A TINY CENTRAL MOTHER-OF-PEARL'Singers Patent' COMPASS WITH A WORKING TRANSIT LOCK-LEVER & BEVELLED GLASS COVER.
THERE IS A TINY HOLE TO ALLOW ACCESS TO THE BAROMETER CALIBRATION SCREW. THE BAROMETER IS IN FULL WORKING CONDITION AND READILY PASSES THE'PLASTIC BAG TEST'. THE THERMOMETER IS INTACT WITH NO AIR-GAPS IN THE SILVER FLUID. THE TRANSIT LOCK OPERATES CORRECTLY BUT THE COMPASS DOES NOT FIND NORTH ACCURATELY.
THE CASE IS IN GOOD CONDITION WITH SOME WEAR & AN OLD LEATHER RESTORATION OVER THE HINGE. THE CASE CLOSES FIRMLY AND THE BUTTON & CLASP ARE BOTH PRESENT.
INTERNALLY THE CASE IS COVERED IN MAROON VELVET AND SILK LININGS IN EXCELLENT CONDITION. The item "MINIATURE DOUBLE SIDED POCKET BAROMETER ALTIMETER THERMOMETER COMPASS COMPENDIUM" is in sale since Friday, April 19, 2019. This item is in the category "Antiques\Science/Medicine\Scientific Instruments".The seller is "weatherzone25" and is located in Middlesex. This item can be shipped to United States, European Union member countries, Canada, Australia.
- Period: 1800 to 1900