I am interested in a system of natural units that I see used more and more frequently in Quantum Gravity research papers so I like to try using them. the units are like conventional planck except |8piG| = 1 I want to see if there is anything in the Cambridge Handbook of Physics Formulas which would be fun to transpose into natural units and see how it looks. Essentially to see how various formulas look if you set 8piG = c = hbar = k = e = 1 (well not exactly but that's the idea) Richard has a copy of the handbook, I might have to get one or borrow a library copy. here is the publisher's page on it: http://www.cambridge.org/aus/catalogue/catalogue.asp?isbn=0521573491 here is the TOC: Contents 1. Units, constants and conversions; 2. Mathematics; 3. Dynamics and mechanics; 4. Quantum physics; 5. Thermodynamics; 6. Solid state physics; 7. Electromagnetism; 8. Optics; 9. Astrophysics; Index.