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HEATING EFFECT PLATINUM FOIL (0647)
To show that cathode rays produce heat when they fall on matter. Upon focusing the rays at a point, cathode rays generate intense heat shown by the red heating of platinum foil.
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ALPHA SCATTERING APPARATUS (0648)
A low cost apparatus for the demonstration of the Rutherford scattering by means of a gravitational analog of inverse square law repulsion. Comprises a wooden launching lamp about 300x50x 105mm (LxWxH) with a guiding groove running down its curved front face along its length and index marks at 40, 60, 80 and 100mm height above the base that provides 4 pre-determined launching heights. Also included is a spun aluminium hill about 280mm diameter and 60mm height along with a 19mm steel ball. The shape of aluminium hill has been carefully determined by varying its height above the base line by an amount arrived on the basis of the reciprocal of the radius.
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FORTIN'S BAROMETER (0649)
A glass tube of about Bmm bore is encased in an enameled and lacquered brass tube, mounted on a polished wooden board with provision for wall mounting. With chemically engraved, silvered scales, graduated in both mm and 1/10" accompanied with a Vernier having a least count of 0. 1 mm or 1/200 inch of mercury that moves with rack and pinion arrangement and is mounted between the two scales, complete arrangement enclosed in a glass cylinder. A white reflecting surface behind the scales facilitates its easier reading. A glass cylinder towards the lower end of the barometer has an ivory pointer with adjustment screw that provides fiducial setting point to which the level of the mercury in the cistern is adjusted before noting the reading. A ring support and three locking screws at base of instrument provide a mean of securing the barometer in vertical position. Fitted with a thermometer to read ambient temperature. Supplied without mercury. Includes instructions for filling the Barometer.
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CASE FOR FORTIN'S BAROMETER (0650)
A well finished, polished, hardwood case with transparent front and side panels. Back of the case has provision for securely hanging the Fortin's Barometer.
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BAROMETER TUBE Made of Borosilicate Glass (0651)
A straight tube of clear glass, about 90cm long and 3 to 4 mm bore, having one end open.
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BAROMETER TUBE Made of Neutral Glass (0651)
A straight tube of clear glass, about 90cm long and 3 to 4 mm bore, having one end open.
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BAROMETER TUBE Made of Borosilicate Glass (0652)
A tube 90cm long and with bulb on the shorter limb
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BAROMETER TUBE Made of Neutral Glass (0652)
A tube 90cm long and with bulb on the shorter limb
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BAROMETER FUNNEL (0653)
For filling mercury in barometer tubes.
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BAROMETER ANEROID (0654)
Barometer having sensitive and accurate movement with 100mm circular dial graduated 2B to 31 inch of mercury and 960 to 1060 x 1 hPa. The scale designed for maximum clarity and ease of reading. Protected by transparent cover in a plated bezel. Includes resettable index pointer and provision for wall mounting.
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BAROMETER, ANEROID, DEMONSTRATION TYPE (0655)
Instrument similar to BAROMETER ANEROID in construction, but completely enclosed in a transparent plastic case with movements clearly visible for the demonstration of its working. With resettable index pointer. Actual effect of increasing or decreasing pressure can be observed as air pressure is changed by squeezing and releasing the attached pressure air bulb.
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THERMOMETER, WALL, DUAL SCALE (0656)
A red spirit filled thermometer made of specially designed capillary facilitates the reading by magnifying the inside column against well contrasted engraving or printing of markings and figures in bold. Range: 20 to 50 x 1?C, -10 to 122 x 2?F. With provision for wall mounting. Available in different variants.
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THERMOMETER, WALL, BIG (0657)
Similar to THERMOMETER, WALL, DUAL SCALE, but in bigger size. Overall dimensions about 500 x 90mm (Height x Width)
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THERMOMETER, MAXIMUM AND MINIMUM, SIX'S, WITH SHADE (0658)
Spirit and mercury filled, dual scale thermometer, @ reading in both Celsius and Fahrenheit. Comprises U-shaped specially designed capillary for easy reading of mercury level or steel index pins in the column. Scale, graduated20 to 50 x 1?C and 0 to 120 x 2?F. Movement of mercury in the U-bend, as a result of expansion or contraction of spirit in both the limbs, forces the respective steel indices to move up along the column. Readings are taken at lower end of indices, whose position can be reset by magnet supplied. Complete weather-proof construction with shade at the top.
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THERMOMETER. MAXIMUM ANO MINIMUM, SIX'S WITHOUT SHADE (0659)
Similar to THERMOMETER, MAXIMUM AND MINIMUM, SIX'S, WITH SHADE in functioning, but mounted on plane baseboard without shade. Double scale, graduated -20 to 50 x 1?C and 0 to 120 x 2?F. spirit and mercury filled with steel index pins. Includes magnet for resetting and provision for wall mounting.
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