Constructing school science lab equipment

Cell holder;
Bulb holder;
Simple switches;
Conductivity test[?];
OHP coil[?];
Friction blocks[?];
Hydraulics Demo;
Angular momentum Apparatus[?];
Demo periscope;
Graticule slides;
Bell jar model lungs;
Model of The Plough[?];
Apparatus for demonstrating osmosis;
Torque Demo[?];

wikipedia.org dumped 2003-03-17 with terodump