Tt'E-BUKNE SEDIMENTS IX MIXAS HASIN, N. S. — BANCROFT. 161 



The results of the complete experiment here appears in 

 summar\^ form, togetlier with the conclusions derived from 

 them : — 



One square mile = 5280 x 5280 = 27,878,400 sq. ft. 

 Average thickness of 59 cakes of ice= H ft. 

 .-. Number of cubic feot of ice covering one square mile 

 = 27,878,400 xl^ =41,8] 7,()00 cubic ft. 



The weight of one cubic foot of ice of salt water on an 

 average = 551bs. 



Now in 34 lbs. of ice, tl\e weight of sediment found = 1.1 lb. 

 .-. In 55 ' ■ - •' " =55x 1.1 



34 

 = 1.779 lb. 



Hence the weight of sediment in ice covering an area of one 

 square mile = 41,817.7(50 x 1.78 = 74,435,328 lbs. 



Length of coastline, Minas Basin (approximately )= 120 miles. 

 Average width of tidal fiats =| of a mile. 



.-. Amount of surface (at the least) covered by ice 



= 120 xf = 90 sq. miles. 



.-. Weight of sediment borne by the ice covering this area 

 = 74,435,328x90 = 6,699,179,520 lbs = 3,349,590 tons. 



This result shows the transported material to be much more 

 than might have been expected by the casual observer. But, 

 after having performed the experiment, one has the feeling thai 

 the result obtained is far from being an exaggeration of what 

 actually takes place. Where the stretch laid bare at low water 

 is greater than at Wolfville, as in Cobequid Bay, the ice attains 

 a much greater thickness. As "might be expected, the amount 

 of sediment carried b}^ the ice varies with the severity of the 

 winter. During wdiat may be called a broken winter, several 

 sets of ice may be formed, — a prolonged thaw nearly clearing 

 the Basin of ice, only to be followed by a cold snap wdth a new 

 ice crust. 



