Major Frederick Haivn. — Broadhead, 2(:)i^ 
state that althong'h T have sHghtly altered the form of the 
geological report I have endeavored to change nothing- in 
its sense." In his geologic work Maj. Hawn was assisted by 
his son, Laurens Hawn.'"' Hawn's report accompanied that 
of Ruf^ner's, and includes a geological reconnoisance along 
the route, as well as a report on the Ute country, list of mines, 
fossils, rocks and ores. 
Maj. Hawn's letters to the eastern papers during the in- 
fancy of Kansas assisted very much in drawing immigration 
to the territory. Following his advice prospecting for coal 
was done at Leavenworth, and a shaft sunk and coal obtained, 
and now, for a number of years, Leavenworth has been a 
distributing point for coal and the city has prospered. 
Maj. Hawn, through life, was more or less a student of 
science, his later life being chiefly devoted to meteorology, 
and independently of others he showed conclusively that hot 
air waves were not generated by surface heat in their path, 
but by the bearing down or descending air evolving heat 
by pressure. 
Maj. Hawn was a quiet, modest man, and the later years 
of his life were spent in retirement with his family, delighting 
in his fruits and flowers. The day before his death he com- 
pleted an article on meteorology for Colman's Rural World. 
Although he gradually became more feeble in body as he grew 
older, yet his mind was bright to the last. 
Geological Publications' of Frederick HAWN.f 
[Report on country between tlie Mississippi and Missouri rivers 
near the line of the Hannibal and St. Joseph railroad.] Geol. Survey of 
Mo.. 1st and 2nd Ann. Repts., pt. 2, pp. 121-136, 1855. 
The Trias of Kansas. St. Louis Acad. Sci., Trans., vol. i, no. 2, 
I)p.i7i-i72, 1858. 
The rocks of Kansas. By G. C. Swallow and F. Hawn. St. Louis 
Acad. Sci., Trans., vol. i, no. 2, pp. 173-197, 1858. 
[Report on Brown, Doniphon, Chase, Linn, Greenwood, Lyon. 
Butler, Osage and Morris counties, Kansas.] Geol. Survey of Kans., 
Swallow's Preliminary Report, pp. 97-122, 1866. 
[Report on the geology of the Utc country, etc., in southwest Col- 
orado J Report of reconnaissance in the Ute country, made by Lt. E. H. 
Rufifner in 1873; pp. 59-89, 1874. ist session of 42nd Congress. 
*Now probate judge, Leavenworth, Kansas. 
tPrepared by his son. Judge Laurens Hawn. 
