276 



Annals of Horticulture. 



described and figured in Bulletin i 



Fio. 71. 



, Cornell University 

 Experiment Station, 

 40, 41. They proceed 

 upon the principle of 

 compressing the end 

 of a rubber tube. 



Self-Acting Tobac- 

 co Sheets. — Figs. 70, 

 \7i, 72.) McDouwal's 

 tobacco sheet is cellu- 

 lose saturated light 

 tobacco, and which, 

 when burned, gives off 

 strong tobacco fumes, 

 with little heat and no 



noxious gases. Fig. 70 (p. 275) 

 shows the method of lighting and 

 using it in houses. Fig. 71 is a 

 movable screen or cover for trees 

 out of doors, and it is being put 

 in position in Fig. 73. When in 



Fig. 72. 



Fig. 73. 



position, a tobacco 

 sheet is burned 

 under it. — Garden- 

 ers' Chronicle, Nov. 

 8, 537' 



FUMIGATOR (Fig. 



73). A barrel is 

 filled with tobacco 

 stems, and steam 

 from a steam pipe, 

 A, is conducted into 

 it. By turning the 



