To Construct Paper Balloons

Take several sheets of silk paper; cut them in the shape of a spindle;

or, to speak more familiarly, like the coverings of the sections of an

orange; join these pieces together, into one spherical or globular

body, and border the aperture with a ribbon, leaving the ends, that

you may suspend them from the following lamp.

Construct a small basket of very fine wire, if the balloon is small,

and suspend it from the aperture, so that the smoke from the flame of

a few leaves of paper, wrapped together, and dipped in oil, may heat

the inside of it. Before you light this paper, suspend the balloon in

such a manner, that it may, in a great measure, be exhausted of air,

and as soon as it has been dilated, let it go, together with the wire

basket, which will serve as ballast.

To Change The Cards Which Several Persons Have Drawn From The Pack To Construct The Camera Obscura facebooktwittergoogle_plusredditpinterestlinkedinmail