Dewey & books
Melvil Dewey, born in 1851, is the man who made it easy to find the book you want at your local library. Dewey studied at Amherst College and was librarian there until 1876. He then became a co-founder of the American Library Association, started the Library Journal and formulated the decimal book classification system for which he is famous.
The Dewey Decimal System assigns an identifying number to any book and lets lihbrarians group books on any subject, and on related subjects, near each other on the shelves.
The system divides all book into 10 main classes and these are subdivided into groups, divisions, sub-groups and so on.
Professor Dewey was chief librarian at Columbia University from 1883 to 1889. He died in 1931.
Snapshots of the sun
Pioneer British astronomer Warren De La Rue (1815-1889) constructed a 13-inch reflecting telescope in 1850.
In 1858, he invented a photoheliograph for making daily photos of the sun. He published a book titled "On Celestial Photography In England" in 1859.
From 1864 to 1866, De La Rue was president of the Royal Astronomical Society.