188 ARTHUR-BISBY— TRANSLATION OF SCHWEINITZ'S 



Schweinitz, which was doubtless written by Schweinitz. It refers 

 especially to the study of fungi, and as translated by Johnson 

 (Memoir, p. 25) reads: 



" A solid basis to this department of botanical science must be laid, not 

 on a sandy foundation, on the varying freaks and fancies of the mind, but 

 on a perpetual daily and nightly employment of microscopic observation, a 

 dihgent and oft-repeated examination of the whole history of the fungous 

 tribes, a careful perusal of authors, a comparison of their respective syno- 

 nyms, and above all, by the observation of living nature herself, as she 

 unfolds her rich abundance in the recesses of forests, lawns and marshes, an 

 observation which must be continued from day to day, and from year to 

 year." 



The following account includes a translation of that portion of 

 Schweinitz's two works pertaining to rusts, given in the order of 

 the later one, together with a record of material still remaining to 

 represent them, and with comments by the writers. It has been pre- 

 pared with a view of making this monumental work more available 

 to students, especially students of American mycology. 



Following the main body of the work all of the species of rusts 

 mentioned by Schweinitz are arranged in systematic order in ac- 

 cordance with present ideas of classification. The accepted names 

 used for the hosts are generally those of Britton & Brown's " Illus- 

 trated Flora," 2d edition, or of Small's " Flora of the Southeastern 

 United States," 2d edition. 



A serial list is then given of all the numbers in Schweinitz's 

 " North American Fungi " with which this account deals, with the 

 corresponding numbers from the North Carolina list in parentheses, 

 and in a parallel column the name or fact which the study of the 

 material has disclosed. An index of hosts and another of fungi are 

 appended for convenience of reference. 



The microscopic and bibliographical work carried on in connec- 

 tion with this study of the Schweinitz material pertaining to rusts 

 during the eighteen years since the work has been in progress has 

 been done in large part at Lafayette, Ind., in the laboratories of the 

 agricultural experiment station of Purdue University. More than 

 a dozen of those associated in the laboratory work during this long 

 period have taken part in the study, and to them, and to a number 

 of correspondents credit is accorded for material aid. To the 



