46 EFFECTS OF WINDS AND OF 



lake which is near Cleveland. In this region the bottom of the lake is 

 nearly level over about nine-tenths of the width of the lake, the depth being 

 from 10 to 14 fathoms except near each shore. The shape of the cross- 

 section of the lake in this region is illustrated by figure 2, plate 4, which is 

 drawn to scale. Two of the strips are 50,000 feet wide. The other three 

 strips were made narrower simply for the purpose of making one strip 

 boundary run through the Cleveland gage, which is 758,000 feet west of the 

 Buffalo gage. 



The third group of strips shown in table No. 8 lies in the very shallow 

 portions of the lake near its western end. The meridian, which is 1,200,000 

 feet west of Buffalo gage, passes between the Toledo harbor light, near the 

 outer end of the dredged channel to Toledo, and Cedar Point on the south 

 shore of the lake. The extreme western end of the lake is 1,239,000 feet 

 west of Buffalo gage. Note that in this group of strips the depths vary 

 from 3 fathoms to less than one-half of a fathom (which is shown as zero in 

 the table). Note that L is small in this group, only 5,000 feet, and that 



nevertheless the values of - are relatively large, 14.6 for the last strip 



D 3 



shown. 



Sandusky Bay was covered by a computation, similar to that illustrated 

 by table No. 8, separately from the main computation which covered the 

 lake. This was the only case so treated for east or west winds across Lake 

 Erie. In general, it was found necessary to make such separate computa- 

 tions for bays or portions of bays which are not covered by continuous 

 strips across the lake transverse to the assumed wind, the bay being in each 

 such case cut off from the lake on each strip by an intervening point of land. 

 In some of the computations made for certain directions of wind, and es- 

 pecially in Lake Michigan-Huron, there were several such special auxiliary 

 computations for bays. 



When such a computation as that illustrated by table No. 8 had been 

 completed for a given assumed wind and lake, a computation such as that 

 illustrated in table No. 9 was made. 



The strip limits are given in the first column of table No. 9 in thousands 

 of feet measured westward from the Buffalo gage, just as they were given in 

 table No. 8. 



Each value of L corresponding to the width of a strip is given in thousands 

 of feet. 



The third column of table No. 9 gives the length of each strip measured at 

 right angles to the assumed wind in thousands of feet. The entry 110 in 

 the third column for the strip 50 to 100 in table No. 9 means that said 

 strip is 110,000 feet long from the Ontario (Canadian) shore to the Ohio 

 shore. 



The product of the width of any strip as shown in the second column by 

 the length of that strip as shown in the third column is its area as shown in 

 the fourth column, expressed in units of 1,000,000 square feet. 



