CONSTRUCTION NOTES 



361 



vides flying finish for all standard distances, (c) General size. A pool of 

 this size, with the depths as indicated, solves the problem of conducting all 

 the common forms of organized aquatic activity without interfering with 

 the general use of the pool by those not enrolled in these organized groups. 

 3. Depths. Minimum depth of three and one-half feet at each end 

 gradually sloping to a depth of five feet at a distance of 75 feet from each 

 end. Area 40 x 50 feet at one side of the remaining 5O-foot section with 

 sharp slope from depth of five feet to maximum depth of 10 feet at sump 

 17^2 feet from edge. Gradual slope from four and one-half-foot depth at 

 opposite side of pool to five-foot depth at edge of this 40 x 5O-foot deep 

 area. Advantages: (a) Eighty-seven per cent of pool area is between three 

 and one-half and five feet in depth and thus available for non-swimmers, 

 beginners, and fair swimmers. (&) Area at one end, 50 x 75 feet, with depth 

 from three and one-half to four and one-half feet (considered ideal depth 

 for instruction and for beginners) will accommodate a class of maximum 

 size (100 or more). An area of equal size and depth is available at the 

 opposite end for free use. An area 50 x 75 feet, that is, one-half of the 

 remaining center section, which is 100 x 75 feet, is sufficient for water polo 

 or water basket ball (played across pool), while the other half of this section 

 is available for the free use of swimmers and divers. A class in life-saving 

 or the coaching of a swimming team could also be conducted and still pro- 

 vide ample opportunity for free use of this section of the pool, (c) Three 

 and one-half-foot depth at ends is accepted by the A. A. U., the N. C. A. 

 and the N. A. A. F. as sufficient for swimming starts and turns, (d) The 



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PLATE NO Q 



PLATE No. 158. CONSTRUCTION DETAILS 



