The stomach poisons are arranged about the upper left segment 

 of the circle, the fungicides about the upper right segment, and the 

 tracheal poisons (contact insecticides, gaseous, liquid, and solid) about 

 the lower segment. Lime-sulfur solution, sulfur, and the alkali sul- 

 fides have important uses both as an insecticide and as a fungicide, 

 consequently the segments upon which they are arranged are made to 

 overlap, to indicate their double utility, and to avoid duplication and 

 an unnecessary number of lines. The materials listed have been 

 strictly confined to the standard remedies in common use in orchard 

 spray practice. Colored connecting lines are made use of to indicate 

 the effect of mixing. The color scheme of railroad signals has been 

 adopted and is as follows: red, danger; green, proceed; yellow, pro- 

 ceed with caution. The meaning of the solid red and green lines 

 appears to need no further explanation. A yellow connecting line 

 is used to indicate that mixing is apt to produce chemical or physical 

 changes which destroy the original properties or value of one or both 

 of the ingredients, or that the mixture is recommended for use in cer- 

 tain sections, but not in others, or for certain specific purposes. The 

 broken lines indicate combinations which have not been experimented 

 with, or not sufficiently so to definitely establish their status. The 

 probabilities are, however, indicated by the color scheme as nearly as 

 can be judged. 



For the use of the chart in connection with materials, the names 

 of which are not listed thereon, the following list of equivalents has 

 been arranged : 



NAMES NOT LISTED 



Coal-tar "Dips" 



Dilead Arsenate 



Dry Lime-sulfur 



Iron Sulfide 



Lead Hydrogen Arsenate 



Liver of Sulfur 



Miscible Oils 



" Neutral" Lead Arsenate 



Nicotine Sulfate 



Potassium Polysulfide 



Sodium Polysulfide 



"Soluble" Oils 



1 ' Standard ' ' Lead Arsenate 



Sulfide of Potash 



Sulfide of Soda 



Sulfur Pastes, Commercial (as now 

 manufactured) 



Tobacco Extracts, Home-made 



Tobacco Juice or Tea 



"Tri-plumbic" Lead Arsenate 



Wettable Sulfurs, Commercial (as 

 now manufactured) 



Wettable Sulfurs, home-made (con- 

 taining glue, flour, or dextrin) 



CORRESPONDING COMPATIBILITY 

 Soap-oil Emulsions 

 Acid Lead Arsenate 

 Lime-sulfur Solution 

 Sulfur 



Acid Lead Arsenate 

 Alkali Sulfides 

 Soap-oil Emulsions 

 Basic Lead Arsenate 

 Cone. Tobacco Preps. 

 Alkali Sulfides 

 Alkali Sulfides 

 Soap-oil Emulsions 

 Acid Lead Arsenate 

 Alkali Sulfides 

 Alkali Sulfides 

 Sulfur 



Tobacco Infusions 

 Tobacco Infusions 

 Basic Lead Arsenate 

 Sulfur 



Sulfur 



