A rubber hose connected one end of the pipe to a cold-water source, and another 

 hose connected the other end of the pipe to a drain. The pipe had an obstruction near 

 the center and holes drilled through the pipe wall on either side of the obstruction. 

 Cold water would enter the chamber through one set of holes, circulate around the 

 5- inch tubes, and then would leave the chamber through the other set of holes in the 

 drain side of the pipe. The ends of the axle were mounted between two stationary end 

 plates (G) . The plates were pressed against the ends of the chamber by means of coil 

 springs on the pipe axle. Single holes in each of the stationary end plates were situated 

 so that one of the tubes in the revolving chamber could be aligned with these holes. A 

 short length of 5- inch copper tubing was used to connect the hole in one of the stationary 

 end plates with the 5- inch pipe fitting in the end of the press. 



As the adult-diet medium was forced from the press, one of the tubes was filled 

 in the cooling chamber. The chamber was then turned one-fifteenth of a revolution to 

 present a new tube for filling. By the time all 15 tubes were filled, the material in the 

 first tube had solidified and was forced out of the cylinder by another filling of hot 

 medium. By this method, about 75 feet of 5-inch diet cylinders per minute could be 

 formed. 



EGG- EXTRACTION APPARATUS 

 9/ 

 Gast^ developed a mechanical means of extracting boll weevil eggs from squares 



by using a Waring Blendor to grind up the squares. He then separated the eggs from 

 the plant material by passing the material in salt solutions through screens. Subse- 

 quent work showed that more eggs could be obtained from small bolls than from squares. 

 The blender method of grinding the small bolls was not satisfactory, since the grinding 

 process caused considerable damage to the eggs and greatly reduced subsequent egg 

 hatch . 



Razor blades were first used for chopping the bolls into small pieces. The eggs 

 could then be collected from the boll pieces without injury by washing the eggs from 

 the chopped pieces through a series of screens. Because a large number of bolls had 

 to be processed, the hand-chopping method required too much time. A machine for 

 slicing the bolls was needed. Available commercial food-slicing equipment was un- 

 satisfactory for this purpose, because the bolls could not be sliced thin enough. The 

 equipment also tended to crush the bolls, since the blades were not as sharp as razor 

 blades. 



VGast, R. T. Some shortcuts in laboratory rearing of the boll weevil. 

 Jour. Econ. Ent. 54: 395-396. 1961. 



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