96 ICE OF NOBTHEBN HEMISPHERE 



993. Damage from ice accumulation at Niagara Falls. 



1938. Engineering. 145;397-398. [Illustrated description of con- 



ditions in Jan. 1938.] 



994. *Dearborn, Henry and others. 



1865. Opening and closing of the Kennebec River, at Gardiner, 



Maine, from 1785 to 1865. Maine agric. rep. 10:181-182. 



995. Dyer, Jerome. 



1898. The routes and mineral resources of northwestern Canada. 



London. 268 p. fold. maps. ["Ice on rivers and lakes": 

 pp. 169-172.] 



996. Ewens, W. E. 



1938. Control of ice jams in large rivers; causes of heavy ice accumu- 



lations and methods of using thermit and calcium chloride 

 in reducing pressure. Some experiments with thermit con- 

 ducted. Canad. engr. 74(5) :1 1-13. [Photos of Niagara 

 River.] 



997. Frazier, A. H. 



1934. Effects of ice on the flow of the upper Mississippi River. Trans. 



Amer. geophys. un. 15:421-427. 



998. The Freezing of the Niagara Falls. 



1936. Scot, geogr. mag. 52:253-254. 



999. Gardiner, Frederic. 



1865. On the ice in Kennebec River. Amer. j. sci. 40:20-22. 



1000. *Gardiner, R. H. 



1858. Observations on the opening and closing of Kennebec River, 



Maine. Rep. Smith, inst. 1858 :434-436. [Data for 1785- 

 1857.] 



1001. Gibbs, G. S. 



1906. The "breaking up" of the Yukon, Nat. geogr. mag. 17: 



268-272. 



1002. Henry, A. J. 



1918. Ice in rivers 1917-18. Mon. weath. rev. 46:85-95. 



1003. Kindle, E. M. 



1920. Arrival and departure of winter conditions in the Mackenzie 



River basin. Geogr. rev. 10:388-399. 



1004. Koeppe, C. E. 



1931. The Canadian cUmate. Bloomington, 111. 3 p.L., 280 p. 



• maps, diagrs. 



1005. Lloyd, Trevor. 



1943. The Mackenzie waterway, a northern supply route. Geogr. 



rev. 33:415-434. 



1006. Miller, Eric. 



1935. Dates of opening and closing of Lake Mendota and Lake 



Monona, 1851-1935. 4 p. 



1007. *Opening and closing of the Hudson River near Albany, N.Y., 1817-36. Amer. 



1837-1838. almanac (Boston). 1837. Ann. phys. 43:192. 1838. 



