782 WARREN UPHAM 



age Survey of Certain Lands in Minnesota." These lands, ceded 

 by the Chippewas, were surveyed in 1906-8, for the United States 

 Geological Survey, under direction of W. H. Herron, geographer. 

 On the large map of this report the contour of 1,200 ft. above the 

 sea incloses a tract of 1,167 square miles, its most southern point 

 being 4 miles north of the mouth of Red Lake, and its most nothern 

 point 2 miles south of Roosevelt, on the Canadian Northern Rail- 

 way, and about 9 miles south of Muskeg Bay, the most south- 

 western part of the Lake of the Woods. This large tract, nearly 

 flat or somewhat undulating, rising to a maximum elevation of 

 1,310 ft., would be an island if the conditions that produced Lake 

 Agassiz were now restored with the lake level at 1,200 ft. 



Beltrami Island, as thus outlined, however, differs much from 

 its mapping in the Lake Agassiz monograph; for on the west it 

 falls short, by 12 miles, from reaching to Thief Lake, which had 

 been included in the tentative original map of the island area. 

 But the beaches bordering the island have been only partially 

 mapped; and when this work shall be completed by leveling they 

 will show an ascent northward, or almost northeastward, like the 

 other mapped shores of the old glacial lake. Appealing to the 

 mapped gradients of the Herman shorelines from the south end of 

 Lake Agassiz north to Maple Lake and eastward past the south 

 side of Red Lake, Mr. Leverett well concludes that the highest 

 Herman beach, if it is represented on Beltrami Island, must sweep 

 with its northeastward ascent well-nigh above the entire island, 

 touching only its highest ground, in Tp. 159, Rs. 35 and 36. 



Even the second, third, and lower Herman beaches, mapped 

 in succession at slightly lower lines to an entire number of seven 

 on the west side of Lake Agassiz in southern Manitoba, may all 

 be referable, as Professor Todd suggested, to water planes above 

 the beaches at 1,215 and 1,196 ft. on the railway profile crossing 

 the northeast edge of Beltrami Island. My original supposition 

 that much of this island was above the highest level of Lake Agassiz 

 has been needfully corrected by Mr. Leverett in this report. 



Whether any of the Herman shores was marked on the island 

 must depend on the position of the ice border in northwestern 

 Minnesota when the glacial lake fell to its Norcross stage, which, 



