Frederick Pursh : Flora Americae Septentrionalis ; or a Sys- 

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A. Richard : New Elements of Botany, containing the charac- 

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J. E. Smith : A Grammar of Botany, illustrative of artificial, as 

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A. P. De Candolle and K. Sprengel : Elements of the Phi- 

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John Lindley : An Introduction to the Natural System of Bot- 

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W. P. C. Barton : Compendium Florae Philadelphicas : contain- 

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Amos Eaton : Manual of Botany of North America, containing 

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" " Botanical Grammar and Dictionary, translated from 

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Almira H. Lincoln : Familiar Lectures on Botany. Hartford, 

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Conversations on Vegetable Physiology : comprehending the ele- 

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The same, adapted to the use of schools, by Rev. J. L. Blake. 

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J. A. De Luc : Recherches sur les Modifications de 1' Atmos- 

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Newtonus : Philosophias Naturalis Principia Mathematica ; per- 

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