Yes; loaded cars, and even heavy buildings, may be raised by means of a screw of this kind.
CHAPTER XI.
Electricity.
When a cat’s back is rubbed in the dark, what does it give off?
It gives off small sparks.
What are these small sparks called?
They are called electric sparks, or electricity.
If a horse be rubbed in the winter when it is dark, what will be given off from him?