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Specific Gravity Bottle (P-1875)
Made from Borosilicate glass with flat bottom and capillary stopper, unadjusted (a) Capacity 25 ml
(b) Capacity 50 ml
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Pascal’s Vases Apparatus (P-1890)
To show that pressure of liquids depends upon their height of the columns and not on the capacities of the vessels. With four vessels of different shapes. A pillar with rod is mounted vertically on a wooden base. The four vessels of different shapes with screw fittings supplied, can be attached on a support (one at a time) which is open from the bottom. Below this a lever is provided, on one end of which weights can be added and on the other end a disc, on which the liquid in the vessels exerts the pressure. A pointer indicates the level of liquid.
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Spouting Jar (P-1900)
Sheet Metal cylinder 400 x 60 mm (h x d) having three orifices fitted with rubber corks and small glass tubes of narrow bore of the same size but at different heights, down one side. A wide base ensure stability.
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Communicating Vessel (P-1910)
This is an alternative version of P-1905. The apparatus comprises of four different shapes limbs projecting vertically from a common horizontal tube made of glass mounted on wooden/plastic round stand.
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Communicating Vessel (P-1911)
Apparatus as per illustrations made of glass with four different shape & size limbs mounted on wooden stand.
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Lift Pump Mounted (P-1920)
A working model of a clear glass to show and explain the principle involved. It has a cylinder of 25 mm dia and overall lengths of 350 mm. Cylinder is provided with non-return float valves and outlet is by means of a side tube. Glass part unmounted.
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Force Pump Mounted (P-1930)
A working model to demonstrate the principles involved in the action of a force-pump. Cylinder is 25 x 350 mm dia x overall height. It is provided with a non-return float valve at its lower end. Lower part of the cylinder has an outlet side tube communicating with the lower end of another cylinder also equipped with non-return valve. Outlet tube from the secondary cylinder is drawn out into a jet to demonstrate ability of force pump to eject water at high pressure. Unmounted.
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Hydraulic Press (Bramah Press) Mounted (P-1945)
The apparatus comprises a pumping cylinder dia 25mm x 350mm overall height, provided with a piston and a non return valve at its lower end. A side tube joined at lower end of cylinder is also provided with a non return valve as shown in the picture.
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Fluid Pressure Apparatus (P-1955)
To demonstrate the transmissibility of fluid pressure. The apparatus comprises two metal cylinders 15 mm and 30 mm dia respectively fitted with piston and connected by a tube. The pistons are provided with rods terminating in plate forms for loading with masses required. The complete apparatus is fitted on a wooden base.
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Pressure Syringe Glass (P-1960)
To show that pressure of a liquid is transmitted equally in all directions A glass cylinder approximately 200 x 25 mm provided with plunger terminating in a spherical bulb 50 mm diameter, the spherical bulb having a series of a small holes along its circumference.
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Cartesian Diver (P-1970)
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Hares Apparatus (P-1980)
This apparatus is used to compare the densities of liquids. It comprises of three limbed glass tube side limbs 45 cms long and rubber tubing on the centre limb closed by mohr clip. Mounted on wooden stand with a 45 cm long scale on both limbs with zero at bottom. The densities of liquid are compared by measuring heights of the two columns of the liquid by applying suction to centre limb.
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Spare Glass Tube for above (P-1980/1)
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Hydrometer Glass (P-1990)
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Nicholson Hydrometers (P-2008)
For liquid and solid density experiments, comprises hollow metal floatation body, upper loading pan, and weighted lower cone, all black painted. Approx length 25cm
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Battery Hydrometer (P-2010)
To measure the charge of lead-acid storage batteries by measuring specific gravity of the electrolyte. Hydrometer float calibrated for specific gravity. 1.100-1.350 range with coloured zones. The float is contained in a glass tube fitted with a rubber nozzle and a flexible rubber bulb.
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Bernoulli Tube (P-2020)
To demonstrate that when a liquid flows through a tube having a constriction, the speed of flow is increased and pressure decreased in the constricted section. A horizontal tube 500 mm long 12mm O.D. is constricted near its centre and short side tubes are provided in each section for attaching glass manometer tubes 270 x 8 mm bore. If a constant head device is used to send a flow of water through the horizontal tube the variation of pressure in various sections may be determined.
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Boyle’s Law Apparatus (P-2030)
Two glass tubes 220mm long x 8mm bore one closed at the top and other open. Lower ends of two glass tubes are joined by 1 meter of pressure tubing. Both tubes mounted on sliding brackets lockable in any position on metal support rods. Polished wooden stand with graduated scale 0-100 cms, with mms in centre and figured every cm on either side. Supplied without mercury.
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Boyle’s Law Apparatus, Demonstration (P-2040)
This apparatus is designed to demonstrate to students that volume of air enclosed in the column is clearly visible to students. A wide bore glass tube is mounted vertically in front of a scale graduated 0-60 cm. Zero corresponds to the inside of the closed top end of the tube. Air is confined in the tube by a coloured oil contained in a metal container fitted with a Bourden type gauge. A tap is fitted to the side of the metal container, for the air inlet tube from the pump. As the pressure in the oil container is increased, oil is forced into the glass tube and volume of contained air and its actual total pressure are directly indicated. The tube is of extra strong glass having very large safety overload margin. As a further precaution, a safety plastic screen is secured over the front. Overall ht. 690 mm approx. Supplied complete with oil.
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Foot Pump (P-2045)
A standard car pattern with an integral pressure gauge from 0 to 4 kg/cm2 and rubber tube adopter. The pump has a cylinder and provided with integral pressure tube and standard type valve connector.
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Air Pump Vacuum (P-2050)
Fixed on polished wooden base, single barrel made of steel pipe with stopcock. Pump plate made of aluminium dia (a) 15 cm (b) 20 cm (c) 25 cm.
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Pump Plate On Stand (P-2055)
Plate made of Aluminium, with tube for connection to the pump and a stopcock on the central pillar. Mounted on tripod heavy base. (a) (b) (c) Plate dia 175mm 200mm 250mm
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Bell in Vacuum (P-2060)
Comprises an electric bell 3-6V, enclosed in a Glass Bell Jar 225mm high, 15cm dia, with ground flange, fitted with suitable cork and terminals on top.
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Magdeburg Spheres (P-2065)
Cast Iron or Brass fitted with stopcock and handles. Two metal hemispheres having removable handle and stopcock to a vacuum pump. This demonstratesatmospheric pressure. Made of Iron (dia) (a) 62mm (b) 75mm Made of Brass (dia) (c) 62mm (d) 75mm
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Capillary Apparatus (P-2085)
This apparatus is used to measure surface tension by Capillary rise in a small bore. It comprises six glass capillary tubes 125 mm long, ends ground flat, of different bores, supported by a metal frame in a shallow metal trough.
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Surface Tension Balance, Searle’s (P-2110)
It comprises a cast metal bridge mounted on a triangular shaped stand adjustable for height and having a leveling screw with knurled head fitted to one corner. The bridge carries a steel torsion wire stretched across it, one end of which adjustable for torsion wire, by screw. At the centre of the wire a small clamp is fitted which carry light weight metal pointer with an adjustable counter-poise. From the notch near the tip of pointer is suspended a small mass pan with a hook fitted to its underside, to hang either a wire frame or a metal clip carrying a glass microscope slide 75x25x1 mm. The tip of the pointer move over a vertical scale graduated 6 cm subdivided in mms. Supplied complete with wire frame, micro slides clip, six glass microscope slides and spare length of torsion wire.
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U-Tube Manometer (P-2130)
Made of 8mm dia glass U-tube mounted on a stand, Scale calibrated from 250-0-250 mm in 1mm div. A. U Tube without stop cock
B. U Tube with stop cock.
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Barometer, Fortin (P-2135)
A glass tube of 6mm bore is enclosed in an enamelled and lacquered brass case, mounted on a polished wooden board with plates for fixing on wall. Open plate reflectors, ring and screws for vertical adjustments. A dual scale graduated in 25 to 32 inches and 640 to 810mm is read by verniers moving by rack and pinion, reading to 0.002 inch and 0.1mm are enclosed in a glass cylinder. A glass cistern at the lower end of barometer is provided with an ivory point to adjust the level of mercury. A thermometer -10 to 50°C is provided on the wooden board. Supplied without mercury and glass case.
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Barometer Aneroid, Demonstration (P-2155)
Demonstration type, fully enclosed in a transparent synthetic case for demonstration. 100 mm coated dial reads from 28 to 32 inches and 950 to 1040 millibars, air tight sealed all around, pressure rubber bulb provided to force the movements, for educative demonstration.
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Hygrometer Wet and Dry Bulb (P-2160)
Comprising two -10 to - 50°C x 1°C thermometers fitted on scale. One thermometer bulb is covered with muslin which kept moistened being connected to a water reservoir. Mounted in a case with hinged cover. Supplied complete with relative humidity table.
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Hygrometer, Whirling (P-2165)
This is a ventilated type hygrometer. It is particularly useful for measuring local differences in humidity. It comprises two thermometers - 5 to 50°C. Mounted in a wooden body. One thermometer has a wick dipped into water reservoir. Supplied complete with humidity chart, and carrying case.
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Hygrometer Regnault, Single Type (P-2170)
To determine dew point temperature. It comprises of a glass tube 150x25 mm with chromium plated metal thimble cemented to the base. It is fitted with a rubber bung carrying two right angled glass tubes for air inlet and outlet and a thermometer.
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