| W. O. A. | Wilbur Olin Atwater, Ph.D. (1844–1907).- Formerly Professor of Chemistry, Wesleyan University, U.S.A. Special Agent of United States Department of Agriculture in charge of Nutrition Investigations.
|  | Dietetics (in part). |
| W. R. E. H. | William Richard Eaton Hodgkinson, Ph.D., F.R.S.- Professor of Chemistry and Physics, Ordnance College, Woolwich. Formerly Professor of Chemistry and Physics, R.M.A., Woolwich. Part author of Valentin-Hodgkinson’s Practical Chemistry; &c.
|  | Dynamite. |
| W. R. L. | W. R. Lethaby, F.S.A.- Principal of the Central School of Arts and Crafts under the London County Council. Author of Architecture, Mysticism and Myth; &c.
| | Design. |
| W. S. J. | William Stanley Jevons, LL.D.- See the biographical article: Jevons, William Stanley.
|  | De Morgan. |
| W. W. | William Wallace.- See the biographical article: Wallace, William (1844–1897).
| | Descartes. |
| W. W. R.* | William Walker Rockwell, Lic.Theol.- Assistant Professor of Church History, Union Theological Seminary, New York.
| | Dort, Synod of. |