Arizona Agricultural Experiment Station. 170 



the seed in the first vessel and keep it moving up and down in 

 order to mix the water thoroughly with the seed and raise the 

 mass to the temperature of the water. This will lower the tem- 

 perature of the water somewhat and the sack should now be trans- 

 ferred to the second vessel where it should be kept in motion for fif- 

 teen minutes, the temperature of 135 being constantly maintained. 

 The careful following out of these instructions will free the seed 

 from smut-spores and prevent the ruining of the crop from this 

 cause. 



Complaints have been received from time to time during the 

 •spring months concerning the poisoning of cattle by weeds which 

 they may have eaten- In no case have the materials sent as sup- 

 posedly poisonous represented plants which areknown to be so. In 

 no part of the country is the knowledge of this subject at all ex- 

 haustive and this is particularly true of so new a country as Ari- 

 zona where the plants are less thoroughly known than in a re- 

 gion less recently settled. It offers a wide and important 

 field for investigation which it is hoped may be taken up in the 

 early future. 



A. A, Tyler, 

 Associate Botanist, 



