Starlac Industries

Mahesh Nagar, Ambala, Haryana

This is to demonstrate brownian motion. A short cylindrical glass cell closed by cover glass is held vertically in a plastic box with sliding lid. Illumination done by integral line filament lamp and cylindrical glass lens. Overall height 25 mm. approx. Fitted with 4mm socket terminals for connection to 12 V, 3W supply.

Cast Iron or Brass fitted with stopcock and handles. Two metal hemispheres having removable handle and stopcock to a vacuum pump. This demonstrates atmospheric pressure. Made of Iron (dia) (a) 62mm (b) 75mmMade of Brass (dia) (c) 62mm (d) 75mm

A circular white metal screen, 75 mm diameter, with a 10 mm central aperture covered with 1.5 mm mesh wire gauze.

Same as above, disc dia 150mm economy model.

Plate made of Aluminium, with tube for connection to the pump and a stopcock on the central pillar. Mounted on tripod heavy base.

It is a class room demonstration kit for qualitative investigation of nature of mass and making students understand distinction between mass and weight. Kit comprises two metal trays 130 x 50 mm held 200 mm apart approximately on spring steel strips attached to the sides. Or tray has holes to take three equal mass cylinders approximate) (L x D) 100 x 25 mm each. The other tray acts as anchor and ma be clamped to the bench either horizontally or vertically. Three support pins are supplied to fit radial holes in cylinders. Supplied complete with G clamp for mounting.

Sheet metal cube 125 mm side. The four faces of box are dull black, bright black, white and bright with opening at top.

Metallic, consists of three wheels of dia 30, 60 and 120. Having one axle in the middle. The complete set mounted on a rod fitted to a tripod base. Supplied with slotted weight sets and a thread roll.

To measure light intensity by comparison. It comprises a waxed paper screen with a wax free central spot 16mm diameter.

To measure wave length of light by observing fringes produced by interference of two light beams from a common source, passing through two slits. Comprises a photographically reproduced double slit 10 mm x 1 mm. Separation, protected by glass plates in 50 x 50 mm mount. Mounted in a frame with a hinged joint and < micrometer screw to give fine adjustment.

Consists of a full length metal upright 245cm long graduated in cms, to be mounted vertically near a wall by means of two brackets. A light weight accurate frictionless wheel of 10cm dia is mounted on it's top. Three adjustable clamps move along the rod. Upper carrying a ring and lower carrying a platform and the third is equipped with electric release system. The unit is all metallic and complete with two sets of falling weights and rider weight.

It is to demonstrate the transmission of pressure by a liquid. Approx 35 mm long (hollow figure made of glass with one fine opening, to float upright in water filled glass cylinder). When the diver is placed in a glass jar full of water it floats. When a stopper or membrane is fitted on top of cylinder, changing the pressure within the Jar, the diver will sink or rise depending on the pressure applied. Supplied without cylinder.