"This apparatus consists of:
- The horizontal wire enamel-No. 22 wrapped around a wooden core; 2 sets (10, 20 turns) at the end, there is a connector
- 2 wires hung in a vertical line 2 cm in diameter, size of 8x10cm. and 4x10cm. At the end of the wire, there is a slot for hanging
- A wooden pole with a scale to measure the distance and a pole for hanging wires. The coils are adjustable horizontally"