CONTENTS 



OF 



THE FIRST VOLUME. 



MECHANICS. 



Page 



Matter and its properties 1 



Motion 7 



Attraction » 12 



Centre of gravity 20 



Repulsion 22 



Mechanic powers 23 



The lever 24 



The wheel and axis 36 



The pulley 41 



The inclined plane 43 



The wedge • 44- 



The screw 45 



Compound machines 48 



Moving powers in machinery 52 



Friction 57 



Communication of motion in machines 59 



Regulation of motion by fly-wheels 62 



Of mills 6 7 



The pendulum 80 



Chronometers °3 



Wheel carriages *0* 



HYDROSTATICS 1°7 



Of specific gravities **7 



PNEUMATICS V2(S 



