(Didactic Division)

Fluid Mechanics

Specific Gravity Bottle

Spherical pattern not adjusted, light blown neutral glass, with flat bottom and perforated stopper Available Capacities are 10ml, 25ml, 50ml


For specific gravity, shot loaded, sub-divided in 0.002mm. Overall length approx. 250mm. Range 0.80mm to 1.00mm adjusted for low surface tension, others adjusted for medium surface tension.

Bernoulli's Tube

To demonstrate the Bernoulli effect produced by water flow. Comprises a Bernoulli tube, with central constriction, a constant bore gradient tube, 6 length glass tubing, 2 swan-necked outlet tubes and 8 pre-cut lengths of rubber connecting tubing. The 2 flow tubes, each 500x13mm, length 25mmx150mm spacing, extended to form 500mm manometer with the lengths of glass tubing.

Boyle's Law Apparatus

Precise instrument for demonstrating the relationship between pressure and volume of a given amount of gas. Two glass tubes, one closed at one end, and the other with both ends open are connected by a long rubber tube. Wooden meter rule permits measurement.


For use at moderate pressures, fabricated from glass tubing 6mm bore, 8mm outside diameter. Glass manometer with built-in stopcock mounted on back plate. The apparatus is open at both ends and is supplied unfilled, 250mm long, 32mm wide (75mm wide including the side arm)

Boyle's Law Apparatus, Demonstration Type

Wide bore glass tube closed at top is mounted on a scale 0 to 600 mm. with zero corresponding to the inside of the top end. Air is trapped by coloured oil in a metal pressure chamber fitted with a Bourdon Gauge and a riffled inlet tube with stopcock. With a plastic safety screen over the tube.

Spouting Cylinder

For demonstrating the principle that the pressure increases with depth. Comprising of a 60 mm. metal pipe with 3 orifices of the same size at different heights down one side. The cylinder is 400 mm. high.

Liquid Level Apparatus

To show that the level of liquid in communicating vessels is constant irrespective of the size or shape of the vessels. The apparatus comprises four glass tubes of different shapes and cross sectional area projecting vertically from a common horizontal tube. The tubes are mounted on a polished wooden base.

Kinetic Theory Model

For simulated molecular activity in gases. To understand and study motion and behavior of molecules in gases. An electric motor, running at 4 to 12 V DC vibrates a small platform inside a transparent tube so that a set of many small stainless steel balls is vibrated violently inside the tube. An increase in the violence of vibration simulates an increase in gas temperature and an increase in the weight of the 'float' simulates an increase in gas pressure. Supplied with balls and 2 'floats'.

Pascal's Law Apparatus

To show that the pressure of liquids depend upon their height and the surface of bottom of the columns and not on the capacities of the vessels, with plastic/glass vessels of four different shapes mounted on leak proof metallic collars, all parts of brass and chrome plated.