50 



its summer and winter appearance, discusses the production and 

 viability of the seed and natural propagation of the plant by- 

 means of shoots springing from the shallow-lying roots. In 

 briefly describing its anatomy and the occurrence of rubber and 

 resin, the guayule is contrasted with latex plants, and the effects 

 of irrigation upon the secretion of rubber are noted. 



Among the conclusions drawn by the author, the following 

 are the more important. If, despite the apparently small num- 

 bers produced, all the seeds which actually germinate in the field 

 should survive, there would frequently be many more guayule 

 plants than could find room to develop ; that it would be difficult 

 to completely eradicate guayule on account of the readiness with 

 which shoots are formed from the roots ; that under irrigation 

 the ratio of the rubber producing tissue to the non-producing 

 tissue is lowered by the relatively greater development of the 

 wood cylinder and the reduction in thickness of the medullary 

 rays ; that finally the wood becomes harder and the stems show 

 a strong tendency to run out into flowering shoots which die 

 back. These disadvantages are compensated for, however, by 

 the much more rapid rate of growth which, in irrigated plants, 

 averages five to eight times that of field plants, the maximum 

 rubber disposition in the former comparing favorably with that in 

 the latter. 



The paper is concluded with a description of the habitat of the 

 plant and a resume of the economic problems concerned with its 

 culture. Charles S. Ridgway 



NEWS ITEMS 



Dr. Raymond H. Pond has recently accepted a position at the 

 Agricultural Experiment Station at College Station, Texas. 



Professor E. Dwight Sanderson has resigned the directorship 

 of the Agricultural P^xperiment Station of the New Hampshire 

 College. 



Syracuse University will begin next fall courses in forestry and 

 agriculture, leading to the establishment of a college of agricul- 

 ture and forestry. 



