CONTENTS 
 Page 
A Laboratory Study of the Absorption of Light by Lake Waters (54 text figures)
HARRY R. JAMES and E. A. BIRGE          - 1 
Microstratification of Inland Lakes (10 text figures) LESTER V. WHIT 
 NEY 155 
Continuous Solar Radiation Measurements in Wisconsin Lakes (11 
 text figures) LESTER V. WHITNEY 175 
Transmission of Solar Energy and the Scattering Produced by Suspensoids in
Lake Waters (4 text figures) LESTER V. WHITNEY ... 201 
Mineral Content of the Lake Waters of Northeastern Wisconsin (7 
 text figures) C. JUDAY, E. A. BuiGE and V. W. MELOCHE 223 
The Estimation of Magnesium in Lake Water Residues V. W. MEL0CHE 
 and KATHERINE PINGREY 277 
Sodium and Potassium Content of Wisconsin Lake Waters and their Residues
(18 text figures) D. LOHUIS, V. W. MELOCHE and C. 
 JUDAY 285 
Geology and Ground Water of the Trout Lake Region, Vilas County, 
 Wisconsin (6 text figures) CARL Fams, Ja 305 
The Distribution of Heterotrophic Bacteria in the Bottom Deposits of Some
Lakes (6 Text figures) ARTHUR T. HENRIcI and EI~IzA 
 BETH McCoy 323 
The Silica and Diatom Content of Lake Mendota Water (8 text figures) 
 V. W. MEL0CHE, G. LEADEE, L. SAFRANSKI and C. JUDAY 363 
Photosynthesis of Aquatic Plants at Different Depths in Trout Lake, Wisconsin
(13 text figures) WINSTON M. MANNING, C. JUDAY and 
 MICHAEL WOLF 377 
Amount and Distribution of the Chlorophyll in Some Lakes of North 
 eastern Wisconsin (3 text figures) ZYGMUNT KOZMINSKI 411 
A Study of the Fish Parasite Relationships in the Trout Lake Region 
 of Wisconsin SAMUEL X. Caoss 439 
Age and Growth of the Sucker, Catostomus commcrsonnii (Lacépède),
in Muskellunge Lake, Vilas County, Wisconsin (Plate I and 5 
 text figures) WILLIAM A. SpooR 457 
A Second Report on the Growth of the Muskellunge, Esox masquinongy immaculatus
(Garrard) in Wisconsin Waters (1 text figure) 
 CLARENCE L. SCHLOEMER 507