ce Box, that I will surely answer all their letters and
return them eggs, but they must not be surprised if it is not
immediately, for nearly all asked me for the same kind of eggs,
and I can only send them as fast as my agents, who are colored
children, find them and bring them to me.

ALICE I. PAINE,
Ingleside Farm, Cherokee County, Georgia.

* * * * *

I would like to exchange birds' eggs with some one in a distant
State or Territory.

GEORGE L. RUSBY,
Franklin, Essex County, New Jersey.

* * * * *

I am eleven years old. My papa is a doctor, and my mamma teaches a
Kindergarten school. I have a little sister we call Fredie. We
each have a kitten, and I have a canary.

I am making a collection of bugs, butterflies, shells, and
minerals, and I would like to exchange with "Wee Tot" Brainard,
or any other little girl. I have not a very large collection yet,
but I am adding to it fast.

JESSIE MAY ALLEN,
Charlotte, Michigan.

* * * * *

SALT LAKE STATION, UTAH.

My new telescope works a great deal better than my first one. We
had to exclude about half of the light by putting a piece of
pasteboard with a hole in it in front of the object-glass, which
has a diameter of two inches, and a focus of sixty inches. It
magnifies the moon about forty times, as near as we can judge. How
can I tell exactly how many times a glass magnifies?

How many of the other boys have tried to make a telescope
according to the directions given in YOUNG PEOPLE No. 1?

How can I make a cheap camera obscura?

Is it injurious to the eyes to look at the moon through the
telescope without smoked glasses?

OLAF T.

The oculist from whom you obtained your lenses will tell you their
magnifying power.--You do not need smoked glass when looking at the
moon.--A simple form of the camera obscura (dark chamber) is a box
furnished with a lens whose focal length is equal to the length and
height of the box. At the opposite end of the box from the lens a mirror
is placed at an angle of forty-five degrees, from which the image
received through the lens is reflected upon a piece of glass, the under
side of which should be ground, placed flat directly above the mirror.
The image will of course be inverted. It will be m