248 FLORIDA GEOLOGICAL SURVEY-I5TH ANNUAL REPORT

attractive product and is used in lieu of hard limestone, sandstone, or crystalline rocks that would have to be imported.
 Many gypsum products, principally hollow blocks, have also been widely used for inside walls, fireproofing, and similar work, where the strength of the material is not of prime importance and where there is no exposure to atmospheric conditions.
 All of the above-mentioned forms of building material have been used in lieu of clay products.

 ATTITUDE OF SOME CONTRACTORS AND BUILDERS TOWARD FLORIDA PRODUCTS
 In the past, the average common and face brick supplied to Florida markets by Georgia and Alabama producers have been of superior quality to those produced by some local manufacturers. This condition, augmented by the propaganda advanced by local dealers emphasizing the higher quality of Georgia brick, in order to justify higher prices for them, has resulted in a prejudice against local products. Many architects, contractors and builders have been influenced by this sentiment and have insisted upon Georgia or Alabama products. Many of the, local brickmakers are responsible for this attitude toward local brick in that they have taken little care or pride in the manufacture of their ware and have been content to supply a product of decided inferior quality. Some producers have made and more are making common brick that can compete favorably with any of the outside products.
 In this connection it is interesting to note that in a series of tests made on several Florida, Georgia and Alabama products being considered for use in the recent extension of the Capitol at Tallahassee, the Florida products were found to be superior, and were used. Local brick have also been accepted by the federal architect for use in the Post Office building at Apalachicola.

 ADAPTABILITY OF FLORIDA PRODUCTS
 As has been pointed out, no Florida clays known at present, are suitable for the commercial production of paving brick, sewer-pipe, and the very highest qualities of face brick. All other structural materials made from clays can be produced in the State. Many of the clays now being used for mediocre products can, with the exercise of a little care in