To determine the co-efficient of absolute expansion of mercury. Glass tubes with vertical limbs contained within glass jackets approx.460x 25 mm height x diameter, are closed by bungs and fitted with inlet and outlet tubes. Upper ends of these vertical limbs are angled on emergence from the jackets to produce two short, adjacent limbs placed against a silvered glass scale 0 to 12 cm x 1 mm. Mounted on stand 610 x 230 mm, height x width. Overall height 750 mm approx., supplied without mercury.

For use with above, 160 x l00 mm (diam x ht), with carrying handles.

Gravesande’s, ring mounted in rod with handle, ball with chain. Cold ball passes through the ring but does not pass when heated.

As above, but the ring & the ball with separate

As above, but mounted on tripod stand

To illustrate expansion of metal on heating and contraction on cooling, with steel bar of length 100 x 10 mm and plated brass gauge with a cutout to just accommodate the bar and two holes through which the bar passes when cold.

A heavy cast iron stand slotted to carry a stout iron bar, with ten cast iron breaking bars.

Metal, for experiments on specific heat of different metals, cylindrical metal blocks 1 kg ± 2%. Each block has a central hole for a special immersion heater and an offset hole for thermometer.

For use with above, pack of 10.

For above, spare, glass.

Copper, joint-less, rolled rim

Nickel plated copper calorimeter of 63 x 63 mm lagged and enclosed in an outer vessel of 80 x 90 mm size, with cover having terminals, a heating coil suitable for 3-6 V supply and holes for thermometer & stirrer. With stirrer but without thermometer.

Consisting of a jointless copper calorimetern 75x50 mm on rubber supports, spun outer copper vessel of 100x75 mm diam. copper lid for outer vessel with central tubule for thermometer and slit for copper stirrer, with a looped copper stirrer for the inner vessel.

Copper calorimeter 75 x 50 mm with felt insulation, outer vessel of 100 x 65 mm size with a plastic lid having holes for thermometer & stirrer. A thermometer holder is fixed to the outer vessel. Complete with stirrer.

Copper, with insulated handle.