Note on the size of the Shope rabbit papilloma virus

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Abstract
Since writing our recent review (Markham, Smith & Lea, 1942) on the sizes of viruses and the methods employed in their estimation, another virus has been added to the list of those concerning which we have concordant information by so many different methods that conclusions as to the size and shape and degree of hydration can be drawn with some confidence. This is the Shope rabbit papilloma virus, electron micrographs of which have been published by Sharp, Taylor, Beard & Beard (1942), and for which data on diffusion, sedimentation, density and viscosity have been published by Neurath, Cooper, Sharp, Taylor, Beard & Beard (1941). These data may be worked up by the formulae given in our review, and this note will serve to illustrate the convenience of our formulae for such purposes.