Update free-science-books.md

[MrsRo13ot]

What does this PR do?

Add Resource(s) Your Mind and How to Use It: A Manual of Practical Psychology by Atkinson

For resources

Description

Format : epub, HTML, Kindle (with or no image)

Why is this valuable (or not)

How do we know it's really free?

Book from Project Gutenberg

For book lists, is it a book?

Your Mind And How To Use It is a book, a manual of Psychology

Checklist:

• [x] Not a duplicate
• [x] Included author(s) if appropriate
• [x] Lists are in alphabetical order
• [ ] Needed indications added (PDF, access notes, under construction)

[eshellman]

add year for old books. Is this book useful at all? (for science, as opposed to history)