Across
- 1. a document which gives the rights of an invention to an inventor.
- 4. became weak
- 6. The newspapers proclaimed his work as "a scientific ________."
- 7. a friend or associate
- 8. letter, especially long and official
- 10. Einstein's second wife
Down
- 2. doing something for personal enjoyment rather than as a profession.
- 3. starting to fall
- 5. Einstein called his desk drawer at work the ______ of theoretical physics.
- 9. unable to breathe