198 The American Geologist. ^p"^'^' ^^°'^- 
ed in December, 1902, is an "Official State Map and Prelimin- 
ary Geologic and Economic Map of North Dakota, issued by 
the Agricultural College Survey ... in co-operation with 
the U. S. Geological Survey ; approved by Frank White, Gov- 
ernor of North Dakota, and R. J. Turner, Commissioner of 
Agriculture and Labor." The scale of this map is seventeen 
miles to an inch. The western half of the state, and the Turtle 
mountains, are colored as Laramie clays and shales, with 
many outcrops and mines or openings of workable lignite. 
Thence eastward the remainder of the state, excepting the area 
of the glacial lake Agassiz, is colored as glacial drift overly- 
ing the Montana ^shales of Upper Cretaceous age. Upon these 
colors the courses of the marginal moraine belts are shown 
by another color printing. On the eastern border is the part 
of lake Agassiz west of the Red river, with its large Sheyenne, 
Elk Valley, and Pembina deltas. The extreme limit of the 
glacial drift, and the boundaries of the Dakota artesian basin, 
are designated approximately. 
October 22, 1901, professor Hall was married to Miss 
Jessie E. Taylor, of Fargo, and their life together was one of 
remarkable happiness and mutual helpfulness. They both 
were members of the First Methodist Episcopal church of 
Fargo, and of its choir. Professor Hall was also a member of 
the Masonic fraternity, the Knights Templar, and other social 
organizations. 
His last illness was diagnosed by physicians, half a year 
before he died, as probably to prove fatal within a year, or, 
at the longest, a few years. Yet he courageously continued 
his teaching and his plans for the state agricultural survey. 
One of his last pieces of work was to frame a legislative act 
giving to that survey, as aided by that of the United States, 
a distinct field not duplicating the work of the State Geolog- 
ical Survey, which is in progress under the auspices of the 
State University and School of Mines of North Dakota, at 
Grand Forks. His work of instruction in the college was 
continued until only three days before his death, which oc- 
curred at his home in Fargo the 22nd of January, 1903. For 
him is the divine promise, "Be thou faithful unto death, and I 
will give thee a crown of life." 
