9 PARA RUBBER. 



This apparatus is made with a concave surface on one side 

 to enable it to fit the bark of the tree. It is fixed by means of 

 pins immediately above the top of an incision in such a manner 

 that a weak solution of ammonia or formalin placed therein drips 



FlG. 14. Oblong and Round Coagulating Pans, Collecting^up, and 

 Pail with Strainer. 



from an outlet at its base down the newly pared incision. The 

 rapidity of the flow .of the solution is regulated by means of a 

 screw arrangement connected with this outlet. The object of 

 the added chemical is to prevent the coagulation of the latex in 



