This is just the beginning! Our collection holds over 300 years of history, including rare newspapers, obituaries, marriage records, birth records, and so much more—most of which you won’t find anywhere else!
Mysterious powers and odd finds in early 20th century notes
A collage of scientific curiosities and practical hacks: amplified sound figures and a playful estimate of power, a Brazilian crystal find dated to 500 million years, barber clippers solved by tapping a rubber ball, rust removal with emery dust and oil, vacuum tube coatings with magnesium, and a novel mail box design with dual end access. Also notes on tank lid varnish for waterproofing.
MENTIONED IN THIS ARTICLE
C. C G. Farrington
Geology
Field Museum of Natural History
Brasil
Bate