
Fred’s notebooks often contain fascinating lists of components and materials including this one for a battery from 1905.
It includes:
- India rubber
- Zinc discs
- Copper ore
- KHO (Potassium Hydroxide)
- Hg (Mercury)
- Tie wires
- Paraffin wax
He also notes that
Zinc gives a definite “amp hourage” approximate to 2,000,000 ft lbs = 1 HP hour = 730 watt hours @ 2.4 300 amp hours