134 



JCL Wig ill- 



Diflmptfll 1 



Water. 



Acid.. 





Space 

 Enclosed. 



Feet. 



Feet. 



Fluid ozs. 



Fluid ozs. 



Ozs. 







Cubic Feet 



4 



3 





X 





25 



6 



4 









65 



8 



5 



1 



% 





140 



8 



6 



\* 





H 



200 



10 



6 



2 



1 



l 



255 



10 



8 



3 



1# 



l# 



435 



12 



8 



sy 2 



I* 



l# 



535 



12 



10 





2^ 





815 



14 



8 



t* 



6>* 



2X 



2^ 



635 



14 



10 



3X 



3* 



970 



14 



12 



9 



4^ 





1355 



16 



10 





3^ 





1130 



16 



12 



I0y 2 



5X 





1585 



16 



14 



14 



7 



7 



2105 



18 



12 



12 



6 



6 



1810 



18 



14 



16 



8 



8 



2415 



18 



16 



. 20 



10 



10 



3085 



20 



14 



18 



9 



9 



2720 



9ft 

 ant 





23 



Hi/ 



J- J- 72 



1 1 1/ 



O'xoO 



20 



18 



29 



14# 



uy 2 



4325 



22 



18 



32 



16 



16 



4835 



22 



20 



39 



19# 



19# 



5865 



2\ 



20 



43 



21^ 



21^ 



6500 



The gas treatment has been largely used in combating scale insects 

 (particularly Aspidiotus aurantii) on orange trees. It will be found the 

 most effectual method for exterminating Orthezia insignis or any other 

 insect, upon individual trees. 



Soap and Soapy Emulsions. 



Soap by itself has considerable insecticidal properties. In fact, in 

 many popular mixtures, it is extremely probable that the soap is the 

 most efficacious ingredient. It acts by asphixiation, forming an imper- 

 vious film over the breathing pores of the insects. 



Whale-oil soaps are found to be the best for the purpose. In 

 Insect Life, Vol. VII., p. 369, the following conclusions are drawn from 

 numerous experiments upon trees infested with the San Jose scale 

 (Aspidiotus perniciosus) in America : — ' Soap washes, particularly of 

 Whale-oil soap, have yielded the most satisfactory results ; and at 

 the rate of two pounds to the gallon, under the conditions of thorough 

 drenching of the entire plant, with five or six days of subsequent fair 

 weather, will destroy all the scales, whether applied in fall or in spring. 

 The results with soap in less strength indicate that under the most 

 favourable conditions the same result may be reached with mixtures 

 containing only a pound and a half or more of soap. The action of the 

 soap at the rate ot one pound or more to the gallon, applied in the fall, 

 is generally to prevent blooming and fruiting the following spring, but 

 the vigour and healthfulness of the tree are greatly increased. Applied 

 in spring at the time of blooming, it does not injure the plant nor 



