Physics > Mechanics > Liquid Mechanics, Pressure & Humidity

Made from Borosilicate glass with flat bottom and capillary stopper, unadjusted

(a) Capacity 25 ml
(b) Capacity 50 ml

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.

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.

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.

Apparatus as per illustrations made of glass with four different shape & size limbs mounted on wooden stand.

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.

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.

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.

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.

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.