300 



GLEANINGS IN BEE CULTURE. 



April, 15. 



viilii. In some species spore-formation takes 

 place only when the pabulum is about to be 

 exhausted, and remains at rest until a new 

 nutritive medium is furnished, when they 

 vegetate and again become bacilli or germs. 



There are other species which form spores 

 when the conditions are most favorable for a 

 continued development. The spore-formation 

 of the germs under consideration belongs to 

 this latter class. 



Mm 



At,FAl^t-A RUol'S OVER TWKlvVK FEET IvU^G. 



This cut represents the face of an opening made to the depth of rather more than 13 feet in an alfalfa 

 field on the Experiment Station Farm, at Rocky Ford, Otero County, Colorado. The soil is a fine alluvium. 

 The roots penetrated to a depth of 12 feet C inches, and the simplicity of the root system is well shown, the roots 

 being shown in their natural position. The upper margin of the photograph represents the surface of the 

 ground, which lacks sufficient sharpness to show the crowns and stubble in the picture. 



This alfalfa was four years old, and cut from four to five tons of hay per year. The diameter of these 

 roots, just below the crown, averaged a little less than J^ inch. See Editorials. 



