Society, Politics & Law
Seismograph
...free to swing sideways A pen to attach to the rod A heavy weight to attach to the rod (eg a brick) Strong wire, rope or twine (that doesn’t stretch too much) Some way of moving paper at a steady speed (eg round bits of paper stuck to the hand of an old clock) Nails, hammer, drill, glue, clips. Small flat piece of metal to use as pivot point for rod. [How to set up your...