PREFACE


J. J. Pinke-American Cyanamid Company
J. J. Petruska-Newport Industries Division
A. G. Symons-Layne-Central Company
C. G. Mauriello and Robert Schneider-Bureau of Sanitary Engineer-
 ing, Florida State Board of Health
Lehmon Spillers-Spillers Well and Pump Company
D. M. Harvey-Harvey Hardware and Mill Supply