The Boy's Playbook of Science
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- Pages
- 433
About this book
The Boy's Playbook of Science, by John Henry Pepper, describes arrangements of chemical and philosophical apparatus for experiments illustrating elementary chemistry and natural philosophy. The explanation of eclipses uses a lantern and globes, describing how passing the small globe between the lantern and the large globe casts a shadow on the large globe. The account explains a solar eclipse as the opaque moon passing between sun and earth, and a lunar eclipse as the earth moving directly between sun and moon.
The telegraph discussion describes replacing most of a return wire with copper plates connected to damp earth, stating that the current increases in intensity and moves the instrument's needle more energetically. The explanation says a station may receive a message without a battery, but every station must have its own battery to return an answer.
About the author
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Book facts
- Author
- John Henry Pepper
- Pages
- 433
- Language
- English
- Genre
- Popular Science
- Formats
- PDF, EPUB, Read online