33. The most advantageous load for a porter who carries wood up stairs on his shoulders, has been investigated by M. coulomb; but he found from experiment that a man walking up stairs without any load, and raising his burden by means of his own weight in descending, could do as much work in one day, as four men employed in the ordinary way with the most favourable load.
"On the Economy of Machinery and Manufactures"
Charles Babbage
The coulomb is the quantity of electricity transferred by a current of 1 ampere in 1 second.
"The Radio Amateur's Hand Book"
A. Frederick Collins
The farad is the capacitance of a condenser in which a potential difference of 1 volt causes it to have a charge of 1 coulomb of electricity.
"The Radio Amateur's Hand Book"
A. Frederick Collins