SOME FLORIDA LAKES AND LAKE BASINS.

The flow in cubic feet per second into the well will be
Q -0.0055 d2V 80 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 abnve 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, embracing 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 delay were experienced in the drilling, but by August, 19o5, 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 sufficient. Heavy rains followed, and by January, 19o6, a considerable area, including some cultivated ground, was flooded, practically all county roads leading into Orlando from the east were partly under water and impassable. The colored settlement known as Jonestown in the suburbs of Orlando was partly under water and uninhabitable; 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 impossible or impracticable. Two additional twelve-inch wells werebored in November and December of 1906. The effect of thesewas evident at once, the lake beginning to fall. "By February a third twelve-inch well had been completed, making int all. one; eight-.