314 



FARM BUILDINGS IN SOUTH AFRICA 



in question cuts the curve is distant 4' Of" (to scale) from the base line, hence 

 the graduation mark, 2000 gallons, should be scribed on the wall of the tank 



IOOO /soo 



fiOf/ zorsr/l L 



Fia. 218. 



SOOO 



SSOO 3000 3500 37GO£a??s: 



/" • SOO QSU.Otf-5. 



at a height of 4' Of", above the bottom of the tank, measured vertically. 

 Similarly the positions of the other graduation marks may be determined. 



