250 VLORIDA GEOLOGICAL SURVEY-15TH ANNUAL REPORT

will be necessary to produce first-class materials from any of the local clays and this will, of course, add to the cost of manufacture. It is very probable, however, that the increased cost of transportation from producers outside of the State will exceed the cost of careful and painstaking manufacture of local products, thus giving the local manufacturer a margin in his favor. The absence of cold weather and the abundance of pine wood (at present) for 'Cheap fuel, are additional factors favoring local manufacture.
 Extensive draininge programs are now under way in some parts of the State, and many others are being planned. This will enable many of the now swampy areas to be drained, thus opening them up to agricultural and horticultural pursuits. Drain tile will be needed for much of this work, and this likewise can be prodii-cedilodally, affording an opportunity for an industry of considerable magnitude in this line.
 The stoneware, terra-cotta, and higher grades of clay products, can also be utilized as the demand increases.
 It is to be noted, however, that the establishment of some plants, particularly those for the production of special types of structural material, as roofing tile, etc., requires the investment of a large amount of capital. Capable manufacturers, therefore, will hesitate to risk their money in such enterprises until assured of a large and steady demand for such wares.
 RESBRV14S

 As may be seen from Chapter VIII, the clay resources and reserves of the Sfate are varied. Some sections, as for example the region in the latitude of the Everglades, and southward, have practically no clays. Other sections have clays, but none that are of practical value in the manufacture of clay products. Still others have clays that, with very careful treatment, may be used for products of fair grade. Then, some sections have an almost unlimited supply of excellent clay. For example, Escambia and northern Santa Rosa counties have vast clay reserves suitable for structural materials of excellent grade. The St. Johns River valley, from Jacksonville to Lake George, is underlain by extensive deposits of flood-plain clays, very desirable for common structural materials.