306 BOTANICAL GAZETTE. [ December, 
architecture. The structures are of a light-gray stone, often 
i one staircases and corridors, and are fire - proof 
throughout. 
A ground plan of two floors of the Botanical Institute, 
the ground floor and the story above the latter, called on the 
continent the ‘‘ first floor,”’ accompanies this sketch. These 
Directors 
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1 
Assistant; R 
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are from tracings of drawings kindly furnished me by Prof. 
Zacharias and Dr. Jost, of the Institute, and deserve a care- 
has plans of the basement and attic stories; and these show 
rooms for the porter and his family, and for that excellent 
