Subtle Grammatical Usage Notes

aka Common edits when writing scientific papers.

• Alternate / Alternative
  Alternate means "every other one" in a series. Alternative means "another option". (REL)
• By contrast / In contrast
  Use By contrast when the next word is a noun. Use In contrast when followed by a preposition such as "with" or "to". (REL)
• Where / Wherein
  Use wherein when you can replace with "in which" or "in what".