ELEVENTH ANNUAL REPORT. 25 
for the month, so that, instead of going out of the bay, it was 
driven toward the southeast. 
On August 22, three bottles were thrown off the Steamer 
Lakeside, along the route to Cleveland. The wind was northerly. 
All three were found on the beach within nine miles of the 
places where they were set adrift, two of them August 23 the 
other August 24. 
Quite a number of bottles were set adrift at the entrance to 
the bay when the current was coming in but a number of these 
and also of bottles thrown into the bay in other places were found 
on the shores of the lake. This is not due in any large measure 
to more water going out than coming in but to the fact that the 
lake is so large that the chance of their being brought to the 
mouth of the bay again if they once get into the lake is very small. 
Bottle No. 61 a, with a five foot wire, was put adrift at the San- 
dusky Bay Front Light, Inner Range, by the light-keeper, Frank 
Ritter, November 12 at 4 P. M., and its board watched as long 
as it could be seen, i. e. till it had drifted into the bay about a 
quarter of a mile. In the night it came back to him and he 
found it at daybreak close to the light station, the bottle resting 
on the bottom, its board still at the surface. 
Some of the bottles drifted from Sandusky Bay to Lakeside, 
to Kelley’s Island, to the vicinity of Huron and Ceylon, one in 
the course of 15 days to near the mouth of the Chagrin River, 
75 miles away, one in 35 days to Port Glasgow, Ontario, more 
than one hundred miles. 
CURRENTS AT DIFFERENT DEPTHS. 
On three occasions Mr. Ritter has set adrift at the entrance 
to the bay three bottles at a time, one with a five foot wire, one 
with three and one with one foot, watching them with glasses 
as long as visible. In the first case the deepest bottle went in 
the same direction as the other two — west — but only about 
half as fast, the one and three foot bottles keeping together. The 
wind that day was fresh from the northeast, having been the 
day before fresh from the southwest. In the second case all 
drifted in the same direction — west — but the one nearest to 
the surface lagged behind the other two which kept together. 
The wind at that time was very light from the southeast and the 
incoming current was due mainly to a difference of level, caused 
by winds from other directions for some time before. In the 
third case all drifted southwest, the one nearest the surface 
taking the lead, the deepest one in the rear. The wind had been 
from the southwest for several days but diminished in velocity 
about ten hours before the bottles were thrown in. 
