I 
Clarence A. Cheever MD (1858-1947) a successful Milton, Massachusetts 
physician and amateur botanist built up in his life time one of the most 
complete diatom collections in the Western Hemisphere. Dr. Cheever first 
developed his interest in diatoms as an undergraduate student of Dr. W.G. 
Farlow, at the Bussey Institute of Harvard University. Though he later 
chose to go on to medical shchool and became a practicing physician, Dr. 
Cheever never lost interest in botany. In fact for many years he was the 
editor of The New England Farmer. 
Interestingly enough the study of diatoms always remained a hobby to 
Dr. Cheever, despite the fact that he was continually adding to his 
collection and keeping abreast of the scientific literature on the subject. 
Although he had obviously become well qualified he never published a single 
work on the subject of diatoms. 
The bulk of Cheever's Diatom Herbarium consists of over 10,000 pre¬ 
pared slides, representing a world wide gathering of thousands of species 
and over two hundred freshwater and marine diatom genera. Acquired mainly 
through purchases, there are dozens of collectors and authors, both pro¬ 
minent and obscure, represented in Dr. Cheever's collection. Among these are 
F. Habirshaw, H. van Heurch, Wm. H. Pratt, H.H. Chase, D.B. Ward, H.L. 
Smith, Wm. A. Terry, J.D. Moller, P.F. Cleve, G.A. Fisher, C. Febiger, Wm. 
A. Poyser, Tempere DeBrebisson, T. Eulerstein, F.F. Forbes, P. Klavsen, 
C.L. Peticolas, C.H. Kain, 0. Kendall Jr., R.P. Durkee, E. Thum, G. W. 
Morehouse, J.P. Wintringham, T. Chalkley Palmer, J.R. Bartholomew, J.L. Cloud 
H. Reichett and W.C. Walker, M.A. Booth, H.S. Lauder, L. Leger, A. Newman, 
A.C. Wheeler, R.S. Warren, F.W. Lewis, C. Stodder, M.A. Grunow, E. Samuels, 
J.W. Bailey, J.D. King, N.A. Mason, L. Woolman, F.S. Morton, E. Weissflog, 
C. Bourgogne, W.H. Harvey, J. Pain. 
In addition to the slides the Herbarium also includes 500 vials each 
of W. A. Terry's and F. Habirshaw's cleaned and dried diatoms; a copy of 
Schmit's Atlas der Diatomacee through plate 336; an extensive card index 
to species, collection localities and diatom literature and several of Dr. 
Cheever's note books. 
The Cheever Diatom Herbarium was received in part as gifts in 1941 
and 1943 from Dr. Cheever himself. The remainder of the collection was 
later donated by his son Austin Cheever in 1953. 
The restoration organization and indexing of the Cheever Diatom 
slide Herbarium was begun in June 1974 and completed February 1975. The 
restoration and organization of the collection was carried out by Shirley 
Mah, Dan Plas, Ann Faulkner and Jerry Cacavio. The index was prepared by 
Ann Faulkner and Jerry Cacavio and typed by Alice Panossian. 
