THE BOTANISTS OF PHlr.ADKLl'IIIA. 223 



Of great value. The ,.a,-.icular field of his im-estigations 

 had previously l.een but little worked, but his labo.-s have 

 stimulated research in these very attractive by-paths of 

 science. He will long be remembered bv those who were 

 his friends and correspondents for his kindliness of heart 

 as well as for his conscientious care in the department of 

 science, to ^^•Im•ll he devoted the energies of his later years. 



Bibliography. 



1. "Fresh-^yater Algv^.^'-Botanical Gazette, III-IV • 68 



2. -Mosses of Pennsylvania. "-T^om^^ Bulletin, VI • 36 



137, 181. ""^"^'""''^^ ^^^"'" ^- ^' ^' ^-Torre, BuUetin, VI: 121, 

 4. ;;ANostoc,theMatrixofScytonema.''-r..,^5,,,^^^^^^^^ ,., . ,^^ 



ls~s ' " T "^"f '" ^'^"' ^^°'^'^ ^' ^i^o..n.. and Researches in 

 lb iS.''~To,r€y BulJetin, VI : 281. 



6. ''Fresh-water Alg.^," No. ^.^Torrey Bulletin, VII • 43 

 - "^^ew American Desmids."-Jb,r.^ 5u//e/m, VII • 91 



XIII : 56." ''""""' ""'" °'"''^ °' "^ ^"""' States."-r„,.,.e, iJ„...-„, 



HALLIDAY JACKSON. 



Halliday Jackson,* son of Halliday and Jane (Hou<.h) 

 Jackson, was born near Darby, Delaware County, Perm- 

 sylvania, December 27, 1817. His lather was a prominent 

 -ember of the Society of Friends, and in earlv life ^ 

 tu-o yeai-s among the Seneca Indians, instructhig them in 

 vanous industrial pursuits, and in 1830 publishe,! a work 

 on the Civilization of the Indian Nations " 



; Hallida3- Jr., attended Friends' School at Darbv, and 

 ass,sted_on the farm. At the age of seventeen, aft'e; the 



* 1888. Halliday JACKsos-poems. 



