Showing posts with label public domain. Show all posts
Showing posts with label public domain. Show all posts
Elasticity of the air
Text extracted from "The magician's own book, or The whole art of conjuring" (1862) by George Arnold
This can be shown by a beautiful philosophical toy which may easily be constructed. Procure a glass jar, such as is here represented. Then mould three or four little figures in wax, and make them hollow within, and having each a minute opening at the heel, by which water may pass in and out. Place them in the jar, as seen in the figure, and adjust them by the quantity of water admitted to them, so that in specific gravity they differ a little from each other. The mouth of the jar should now be covered
with a piece of skin or India-rubber, and then, if the hand be pressed upon the top or mouth of the jar, the figures will be seen
to rise or descend as the pressure is gentle or heavy, rising and falling, or standing still, according to the pressure made.
A is for atom
A is for atom is a promotional animation written by True Boardman and directed by Carl Urbino with music by Eugene Poddany. It was commisioned by General Electric to John Sutherland and distributed by the Sutherland Production in 1953.
You can download the original video, that it is in public domain, from archive.org.
via boingboing
You can download the original video, that it is in public domain, from archive.org.
via boingboing
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