X LIST OF ILLUSTRATIONS. 



22. Front of Marshall's House after the observatory had 

 been removed. The door to the left leads into the so-called 

 greenhouse of the botanist. From a photograph taken by 

 the author on May 22, 1896. 



23. Gotthilf Heinrich Ernst Muhlenberg, from a paint- 

 ing by I. Peale. Cut executed by Goodman & Piggott, and 

 printed in red under the supervision of Mr. Julius F. 

 Sachse. Plate the property of the Pennsylvania German 

 Society, in the Proceedings of which Society, for 1896, it 

 first appeared, illustrating an article by Professor Thomas 

 C. Porter, " The Pennsylvanian German in the Field of the 

 Natural Sciences." 



24. Lewis David de Schweinitz, from a photograph 

 furnished by E. A. Rau, of Bethlehem, Pa. The original 

 was copied from a miniature painting, and this photograph, 

 in turn, from an engraving of this miniature. 



25. William Darlington, M. D., from a miniature cut 

 furnished by Dr. William Sharpless, of West Chester, Pa. 



26. Thomas Nuttall, from a photograph copied from a 

 daguerreotype by E. A. Ran, of Bethlehem, Pa. 



27. John Evans, from a photograph by G. A. Lenzi, 

 Norristown, Pa. Loaned by his daughter, Mrs. A. E. 

 Paxson, of Norristown, Pa. 



28. Evans' House and Grounds, with flume of old 

 mill. The house was renovated and changed by the present 

 owner in 1896. From a photograph taken by the author, 

 Aprils, 1897. 



29. Woods and Ithan Creek, Evans' Garden, from a 

 photograph by the author, taken April 3, 1897. 



30. Mill Dam in Evans' Garden (photographed in 

 1897). 



