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08655_Field_TCGG T420.txt
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1996-04-10
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account of this form of entertainment in his Mass
Communication (pp. 13­14):
In the days when Johann Gutenberg’s Bible, printed
from movable type, was stirring wonder in Germany,
another innovation was gaining a foothold in Italy. It was
a kind of game, having at first no apparent relationship
to the dissemination of information or ideas.
The device was described in Leonardo da Vinci’s
unpublished notes. If on a sunny day you sit in a darkened
room with only a pinhole open on one side, you see on an
opposite wall or other surface images of the outside
world—a tree, a man, a passing carriage.
The principle was described in detail in the book,
Natural Magic , by Giovanni Battista della Porta, published
in 1558. A few years later it became known that a lens, in