THE BOTANISTS OF PHILADELPHIA. 221 



Proceedings of the Academy of Natural Sciences. In 1888 he 

 was elected a member of the American Philosophical 

 Society. On March 30, 1893, Isaac Burk died of general 

 paralysis. He was warned, however, by premonitory 

 symptoms, for once while arranging the plants in the her- 

 barium at the University, while on the ladder, he toppled 

 over and fell ; so ardent was his desire to leave the botanical 

 collection at the University in good shape for future useful- 

 ness. He had ten children, of whom four survive: Rev. 

 Jesse Y. Burke, Rector of St. Peter's P. E. Church, Clarks- 

 boro, New Jersey, and Secretary of the Board of Trustees 

 of the University of Pennsylvania ; Addison B. Burk, 

 Assistant Managing Editor of the Public Ledger ; Charles 

 Burk, Foreman in Collins' Printing House, and the late Dr. 

 William H. Burk, for years Associate Editor of the Public 

 Ledger and Botanist of the Peary Expedition to the Arctic 

 regions in 1891. 



FRANCIS WOLLE. 



After a painful and protracted illness, Rev. Francis 

 Wolle* died at his home in Bethlehem, Pennsylvania, 

 February 10, 1895. 



He was born at Jacobsburg, Northampton County, 

 Pennsylvania, December 17, 1817. His ancestors, for two 

 generations, were conspicuously associated with the Moravian 

 Society, and during his long and useful life he was always 

 prominent in the Moravian Church and educational affairs. 

 Although a few of his earlier years were spent in business, 

 he soon turned his attention to teaching as his life-work, 

 and in 1858 he became Vice-Principal of the celebrated 



*1893. Bulletin Torrey Botanical Club, XX, p. 211. C. H. Kain. 



