Vol. 42, Issue #3 has an article by Arnold A. Putnam on The Eads Steam-Powered Revolving Turret. If you're into Civil War monitors, this article discusses the mechanical differences between the Eads turret and the earlier Ericsson turret. For comparison, the British Coles turret is also mentioned to show evolution of turret rotation mechanisms. It's a must read! Single copies are $725 from Warship International, 5905 Reinwood Drive, Toledo, OH 43613.

BTW, I've no financial interest in it and won't enjoy any pecuniary gain if more issues are sold. I just thought I'd pass the word along on a terrific article.