NEW MEXICO. 21 



be strained through a fine wire seive or a piece of muslin, when it can 

 be diluted with an equal quantity of cold water as needed for spray- 

 ing. It is recommended in California for Lecaniums, as well as 

 San Jose scale, for winter use on deciduous trees. 



In the application of this wash a very fine spray is not essen- 

 tial, as the object to be attained, that of thoroughly coating the 

 tree with the compound, can be best accomplished by the use 

 of a rather coarse spray, to be thrown on the tree with consid- 

 erable force. 



The California State Board of Horticulture recommend the 

 following as a winter wash against the San Jose and congeneric 

 scales. It is claimed, and I believe with reason, that the addition 

 of potash to the wash is necessary to prevent the dry atmosphere 

 from exhausting the caustic properties of the soda. This is espec- 

 ially important to us in New Mexico, as our atmosphere is much 

 dryer than that of of California. If soda lye alone is sprayed on 

 trees in sunny weather, it will often be found within an hour to have 

 crystallized into solid carbonate of soda, and its action, so far as in- 

 sects are concered, is at an end. If sprayed in moist weather, its 

 action is prolonged. The addition of the potash, however, main- 

 tains the corrosive action of the soda in the dryest atmosphere, by 

 preventing the rapid evaporation and solidification which would 

 otherwise put an end to it. Besides the potash ultimately reaches 

 the soil, and acts as a fertilizer when needed. The above statements 

 are on the authority of Professor Hilgard. 



No. 7. Solid concentrated American lye (80 per cent.). . 1 lb., or 



Powdered caustic soda (98 per cent.) 0.8 lb., or 



Powdered caustic soda (76 per cent.) 1 lb., or 



Powdered caustic soda (63 per cent.) 1 Ibs., to 



Commercial potash (52 per cent.) 1 lb., and 



Water 2| gals. 



Simply dissolve the soda and potash in the water. First re- 

 commended by Mr. M. Cooke. 



The following formula, recommended by Professor Hilgard, is 



