Smithsonian miscellaneous collections . : !.._ £- Gl/V r>4 /^ / o JtiiHiliiiliJiiffIt ^feti^ii [t^lji^-m-^ f S 5 I I~T93F^ 1935 I I936 fifiiEi^ UNITED STATES LAKE SURVEY MONTHLY MEAN WATER LEVELS OF THE GREAT LAKES From Official Records. 1910 to dale. Fig. 25.—Levels of Lake Ontario, 23-year cycles. Note general ?• ^e about the sixth year, also approximate repetition of features a, b, c, d. 62 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94 means computed from the original data for four lakes. It is unneces-sary to include Lake Michigan, for its level practically duplicates thatof Lake Huron.
Smithsonian miscellaneous collections . : !.._ £- Gl/V r>4 /^ / o JtiiHiliiiliJiiffIt ^feti^ii [t^lji^-m-^ f S 5 I I~T93F^ 1935 I I936 fifiiEi^ UNITED STATES LAKE SURVEY MONTHLY MEAN WATER LEVELS OF THE GREAT LAKES From Official Records. 1910 to dale. Fig. 25.—Levels of Lake Ontario, 23-year cycles. Note general ?• ^e about the sixth year, also approximate repetition of features a, b, c, d. 62 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94 means computed from the original data for four lakes. It is unneces-sary to include Lake Michigan, for its level practically duplicates thatof Lake Huron. Some features, as the low levels of the intervals from. Fig. 26A.—Levels of Great Lakes, 23-year cycles. about the fourth to the tenth year, are so conspicuous as to be shows distinctly in all of the Lakes, but least so in Lake may be remembered in this connection that much of the drainageinto Lake Superior comes from far to the north and west in Canada, NO. 10 SOLAR RADIATION AND WEATHER STUDIES—ABBOT 63 YEARS 3 5 7 9 11 13 15 17 19 21 23 1 3 5 7 9 II |3 15 17 19 21 23 l\ r - 1837-185 3 —, h -f i - A / 11 t V - ^ i /\ ^ ^ / 18 60^1882- 1/ \ 1 1 A1 11 i-ii- —J— 1 \ / \ ; V \ I \ /! lii/ 1 V / I f < 1 1 1 V \ \ / ; / ^/ 1- / 1 tf /I / n \i (1 1 ^T . / li 1 / \ - / \ [ 1 J 0 / ^ IB oAi!. M l V A 905I 1; \ ^i i \ ^?? I l /\ / 0 1 \ /^ ^ / o-l 1 / w 19 29 \ / / V \ 1906-^\ 1928 f1 \ / 11 ;i ^ 1 1 1 ; » J \( A 1 1« ; 1 \ i . \ ; I r ?^ V 1 1 V J \ «• \ \ ,* t /» / » ; -? v . 1 w ii 1 i \ 19: J3\ HURC )N *^ 1 Ef ^lE Fig. 26B.—Levels of Great Lakes, 23-year cycles. Note the markedsubsidence
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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
