SOME FLORIDA' LAKES AND LAKE BASINS. 
The flow in cubic feet per second into the well will be 
d 2 \J~ 
Q = 0.0055 d 2 V = — nearly 
In this formula Q represents the flow in cubic feet per second; 
d is the inside diameter of the pipe in inches, and h the height in 
inches to which the water rises in the long arm above the surface 
of the lake. V is the velocity of flow. 
A notably successful instance of drainage by wells where the 
interests of a municipality were involved occurred at Orlando, 
Florida, and was given in Bulletin No. i, as follows: 
“A very considerable land area south and east of Orlando, em¬ 
bracing possibly fourteen square miles, lies in an irregular basin 
with many lakes, marshes, and ponds. The overflow from this 
area originally drained to and disappeared through a natural sink 
about one mile east of the city. This sink became clogged in April. 
1904. Unsuccessful efforts were made to re-open this sink, first 
by removing hyacinths accumulated around the opening, and later 
by the use of dynamite. In the meantime, heavy and continued 
rains formed a lake around the sink, overflowing the surrounding 
lands. In August, 1904, efforts were made to dispose of the water 
through drainage wells. The first well put down was a two-inch 
test well. The well reached a porous stratum and was thought to- 
justify the expense of a larger and deeper well. Difficulty and de¬ 
lay were experienced in the drilling, but by August, 1905, two wells, 
one eight-inch and one twelve-inch, put down at the side and near 
the original sink, had been completed. Two other wells were 
started and abandoned owing to the difficulties in drilling. The 
two successful wells were running at full capacity. It was thought 
probable that the two wells already put down would prove suffi¬ 
cient. Heavy rains followed, and by January, 1906, a considerable 
area, including some cultivated ground, was flooded, practically 
all county roads leading into Orlando from the east were partly un¬ 
der water and impassable. The colored settlement known as Jones¬ 
town in the suburbs of Orlando was partly under water and unin¬ 
habitable; the water was approaching the city of Orlando itself and 
the situtation was becoming alarming. Levels taken by the county 
authorities indicated that drainage through surface canals was im¬ 
possible or impracticable. Two additional twelve-inch wells were 
bored in November and December of 1906. The effect of these 
was evident at once, the lake beginning to fall. By February a: 
third twelve-inch well had been completed, making in all one eight- 
