no 



PARA RUBBER. 



of a revolving cylinder A (Fig. 19) with ribs u on its inside, and 

 curved blades C, which are fixtures as shown. The rubber latex is 

 poured into the cylinder A, which is then set in motion. The 

 revolving cylinder and its ribs B force the latex forward on to 

 the blades C, which carry it into the centre, creating a kind of 

 vortex or whirlpool in the space D, where the rubber forms into 

 a sponge-like ball. 



" The latex should be diluted with clean water in the propor- 

 tion of one part of latex to four parts of water approximately. 

 The mixing can be done either in the field by putting water into 

 the collecting cups, or in the curing-house. The latex when 





FIG. 18. "Michie-Golledge" Rubber Coagulating Machine. 



brought in should be well strained ; this can be done through 

 ordinary ' grey cloth ' or through very fine mesh brass weaving 

 (No. 40). The latex should then be poured into the machine. 

 If it is allowed to stand for a minute or so after straining, 

 any sand which the strainer has not removed will sink to the 

 bottom of the vessel, and may be retained there when the liquid 

 is poured off. Eight to ten gallons of the latex (liquid) may be 

 considered a charge. The machine should be set in motion 

 after the charge of latex has been poured into the pan, and acetic 

 acid in the proportion of one dram glacial acetic acid to one 

 gallon of latex should then be added. The glacial acetic acid is 

 more convenient in a diluted form of, say, one part of acid to two 



