figure 9. — Movable platform used in exterior application. Note: Platform should 

 be equipped with a substantial handrail on the side away from building. 



APPLICATION 



The use of plastic compounds for sealing tobacco warehouses is obviously in the 

 earliest stage of its development. In this section the discussion or instruction is 

 based on the experience obtained by the Department in the limited work com- 

 pleted in this field up to this time. It is anticipated that with wider application 

 of plastic a much higher degree of efficiency will be developed. 



Economies in Application 



In view of the cost of the material it is important to stress economical applica- 

 tion in the use of plastic. As later indicated, material costs under this method 



16 



