"The Inventions Ruler shows 200 years of human inventive genius from 1800 to 2000. The first battery, the first bicycle and the first tape recorder... All this is presented on the "event side" and "epoch side" of the ruler. Available in English, German and French."
"Shows 200 years of human inventive genius. Since the Industrial
Revolution the inventions presented by scientists and inventors
have multiplied, one after another, for the benefit of mankind. The
I provides an overview and organized form in
the history of innovations from 1800 to the year 2000. The dates
selected cover the essential branches of technology and extend
from the sewing-machine ia Blue Jeans to the zip fastener, from
the telegraph via the Morse Alphabet to the Atlantic Cable. The
development of modern times can be understood year by year in
words and illustrations. The context to the inventions is presented
on the back. The I is the ideal companion to
preserve the overview in the thunder-flashes of human ingenuity"
Dimensions: L 24cm x B 2cm x H 3cm