♦ 



MATERIAL FOR A MONOGRAPH ON THE TANNOIDS, WITH 



SPECIAL REFERENCE TO VEGETABLE PHYSIOLOGY. 



BY J. CHRISTIAN BAY. 



In the Transactions of the Academy of Science of St. 

 Louis, Volume vi, No. 6, was published my material for a 

 monograph on inuline. This paper, the second of a series 

 of similar bibliographical contributions that I contemplate 

 bringing together, deals with the tannoids, long known as a 

 very important constituent of the cells of many plants. 

 As this bibliography is particularly written from the stand- 

 point of vegetable physiology, much of the purely chemical 

 and technical literature has not been taken into account, 

 though the list is intended to be complete, with this ex- 

 ception, up to the end of 1890. Most of the references in 

 these papers were collected in 1891, but for certain reasons 

 I have been unable to print any of the papers until the 

 present time. Meanwhile, several important papers have 

 been published by Bramer, Nickel, and Reinitzer, directing 

 the investigation of the tannoids into a new course, and 

 showing the imperfections of many of the so-called bio- 

 logical investigations. 



No excuse is needed for the publication of bibliographies 

 of this character, other than is afforded by the papers 

 referred to. In vegetable physiology, as in all other 

 branches of the exact sciences, every experiment must be 

 taken into account, although conclusions and theories 

 undergo constant changes; and the reference to such ex- 

 periments is very difficult without collected bibliographies 

 dealing with each subject. 



Although the present list of papers 



is thought to be 



nearly complete, small omissions have probably crept in, 

 and those who know from experience how difficult it is to 

 brin<r together references to the literature of any special 



Reprints issued May 18, 1803. 



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