194 FLORIDA GEOLOGICAL SURVEY-I3TH ANNUAL REPORT

right in the phosphate country, is not surprising, but the still higher figures for R, T, and U are not so easy to e.xplain. Very, likely in each of these cases, however, the phosphorus is mostly combined with iron, as ferric phosphate, which is almost insoluble.*
 There is nothing in the analyses of the two soils from Long Key (samples 0 and P) to indicate extreme sterility, and yet no attempt seems to be made to cultivate them, and the woody plants there are all evergreen.
 Sample Q, from A sandy hammock, is deficient in nearly everything, and its vegetation is nearly all evergreen. In everything except potash its analysis resembles that for C about as closely as two samples from different counties and regions collected by differ.ent people about 35 years apart could be expected to; and the difference in potash illustrates the difference between the.Hilgard and A. 0. A. C. methods in that respect.
 Sample R represents one of the richest upland soils in Florida. S is not very different from Q, but the differences are all in the direction that the vegetation indicates. T and U are rich calcareous
-soils, well supplied with potash and phosphorus also.
 The analyses make V a better soil than W in almost every respect, though the vegetation indicates decidedly otherwise; a paradox for which no adequate explanation tan be given at present.
 X is a rich soil, and Y and Z are poor.

 CLIMATE
 The climate of central Florida differs from that of northern Florida, and still more from other parts of the eastern United States, in being warmer in winter and wetter in summer, especially late summer. The following table of climatic data for a number of stations in the area is compiled mostly from Bulletin W (Sections 83 and 84) of the U. S. Weather Bureau, and the annual climatological summary of the Florida section of the same Bureau for 1913. The data given are the average temperature for January, July and the whole year, in degrees Fahrenheit, the average length of the growing season (period between killing frosts), in days, the. average annual rainfall, in inches, the percentage of the total rainfall that comes in the four warmest months (June to Septenber) and

 *See Hilgard, Soils, p. 356.