What is a spy-glass?
It is a glass mostly used to view distant objects on the earth.
Is the spy-glass like the telescope?
The spy-glass is much like the telescope, only it is smaller.
When looking through a spy-glass, how do objects appear?
They seem to be brought nearer to us, and they appear larger.
By whom are spy-glasses much used?
Spy-glasses are much used by persons on board of vessels, while at sea.
What instruments have we for magnifying small objects?
We have magnifying glasses and microscopes.