Dates: b. 1863; 1890's 1900's; d. 1950
Locations: Chief Chemist, Massachusetts State Board of Health, and Dir. Lawrence Experiment Station (1890's 1910's?)
SAB Involvement: Charter SAB member;
At the 1899 meeting of the SAB, Clark and Gage presented a paper on the "Significance of the Appearance of Bact. coli communisin Filtered Waters," and Clark alone presented "Recent Work on Sewage Purification Involving Bacteria."