In teaching scientific writing, I used:
Revising Prose by Richard Lanham
Style: Lessons in Clarity and Grace by Joseph M. Williams.
Other useful books about writing:
A Dictionary of Modern English Usage by H. W. Fowler. 1926
The King's English by H. W. and F. G. Fowler. 1930
The Elements of Style by W. Strunk and E. B. White. 1935
A Dictionary of Modern American Usage by B. A. Garner.
Writing To Learn Biology by R. Moore.
Mightier Than The Sword by C. E. Good.
The New Oxford Guide to Writing by T. S. Kane.
The Random House Handbook by F. Crews.
The Allyn & Bacon Handbook by L. J. Rosen and L. Behrens.
The King's English by Kingsley Amis.
The Chicago Manual of Style.
Scientific Style and Format.