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POWERS, SAMUEL A. Variola [Smallpox]. A series of 21 heliotype plates illustrating the progressive stages of the eruption. Tall 8vo, 1/2 morocco, backstrip split, front cover stained; hinges split. Boston: Samuel A. Powers, 1882
![POWERS, SAMUEL A. Variola [Smallpox].](/Content/images/image-placeholder.png)
![POWERS, SAMUEL A. Variola [Smallpox].](https://catalogue.swanngalleries.com/full//\default_catalogue.jpg)
