1. Announcement

   • Thomas Lanigan

   Announcement Pages: 92 - 92

2. A cooperative transition theory applied to the kinetics of ionic exchanges in cells

   • William Negendank

   Original Articles Pages: 93 - 117

3. L-929 cells under hyperosmotic conditions

   • James S. Clegg

   Original Articles Pages: 119 - 132

4. Resolution as a function of accelerating voltage in electron microscopy of semithick biological specimens

   • Richard W. Cole
   • Donald F. Parsons

   Original Articles Pages: 133 - 140

5. Mechanisms of successive modes of erythrocyte stability and instability in the presence of various polymers

   • C. J. Van Oss
   • W. T. Coakley

   Original Articles Pages: 141 - 150

6. Spatially periodic discrete contact regions in polylysine-induced erythrocyte-yeast adhesion

   • L. A. Hewison
   • W. T. Coakley
   • H. W. Meyer

   Original Articles Pages: 151 - 157