Abstract
Summary
1. There is no appreciable difference between the particle diameters of the 2 Coxsackie viruses—Strain 1816 (Herpangina) and Strain 4520 (Pleurodynia). The diameter is approximately 37 μx for single particles and about 28 μx for particles measured in rows. 2. The sedimentation constants, estimated indirectly, are 167S for the 1816 strain and 175S for the 4520 strain. For the 1816 strain the visible boundary measurements give 153S in this series of experiments. 3. Attaclay is useful in the procedure for preparing partially purified virus from suspensions of infected mouse muscle. 4. The technic of pseudo-replication from agar blocks has led to electron micrographs showing the virus particles in orderly hexagonal arrays.
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