From time to time, even the most science-averse writers must cover a scientific term in writing. For example, is it Fahrenheit or fahrenheit? Is it Celsius and Centigrade, or celsius and centigrade? While there are several authoritative guides that should be found on the shelves of all science writers (The AIP Style Manual, Physical Review Letters, Astrophysical Journal, and The ACS Style Guide for chemists), the following are some general guidelines for nontechnical editors.