SALT-WATER SYSTEM AT U.S. LABORATORY, BEAUFORT, N.C. 



123 



Figure 4. — Laboratory water tables with dual salt-water systems. 



flows of various heights. The drains from' 

 the outside tanks and laboratory tables are 

 of 8-inch terra-cotta pipe with cemented 

 joints. 



The water tables in the laboratory, with 

 inside dimensions of 4 feet by 8 feet by 10 

 inches deep, are constructed of 2- by 10- 

 inch cypress planks and are lined with 

 sheet lead (fig. 4). More recently, addi- 

 tional water tables were constructed of 

 %-inch plywood lined with fiberglass. 



Both types have proved satisfactory. All 

 salt-water pipes as well as other utility 

 lines in the laboratory are located in 

 trenches with sheet iron covers at floor 

 level so that they are readily accessible 

 in case repairs are needed and also to 

 allow flexibility in arrangement of equip- 

 ment. 



This salt-water system has now been in 

 almost continuous operation for more than 

 7 years and has given excellent service. 



712-029 0—64- 



