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48 pages, Library Binding
First published August 25, 2015
Slipped into the cameraGiven all that, it's a wonderful book for those children who are fascinated by gizmos and gadgets. It does also perform that necessary task of exposing children to some important names and inventions. The two weak inventions, windshield wipers and three-way traffic signals, are presumably there only to satisfy the diversity demand.
was a copper plate
bathed in iodine crystals.
(It's power was great!)
The plate copied an image
that no-one could see
until mercury fumes
made it clear as could be.