165 Eleventh Annual Report. 



The yield upon the latter date was 10.4 tons per acre, giving 

 an approximate yield of sugar per acre of 2165 pounds. This 

 plat, and others sown later, suffered for want of water during the 

 latter part of their growth, owing to the drouth and consequent 

 shortage of iirigating water during the past season. 



EUCALYPTS. 



Experiments with and observations upon these trees have 

 been continued throughout the year. Their great value as a fuel 

 and timber tree , as well as their usefulness for shade and for wind- 

 breaks, makes the introduction of the species that will grow here 

 important. It is now thoroughly demonstrated that the Blue Gum 

 (E. globulus) will not endure the summers of the warmest parts 

 of Arizona; but it endured both the summer and winter climate 

 of Safford during the past year. 



Of those set during the spring of 1899 and reported on last 

 year, only the following endured both the heat of summer and the 

 frosts of the following winter: E. corynocalyx (sugar-gum), E. 

 cornuta, E. leucoxylon, E. melliodora, E. occidentalis, E. poly- 

 anthema, E. rostrata (red gum), E. rudis, E. siderophloia, and 

 E. stuartiana. 



For the purpose of testing the feasibility of late summer and 

 early fall planting, several species were set during last August and 

 September. All made a good start, and the following endured 

 the ensuing winter and are still in good condition: E. occident- 

 alis, E. robusta, E. sideroxylon, and E. tereticornis. 



The species that had failed to survive the previous summer 

 were reset last April. As a result of the two seasons experiments 

 with young seedlings, it is pretty well established that the follow- 

 ing will not endure the heat of our summers, or make such slow 

 growth that it is not advisable to set them: E. acmenoides, E. 

 amygdalina, F. calophylla, E. diversicolor, E. engenioides, E. fici- 

 folia, E. globulus, E. gomphocephala, E. gunnii, E. longifolia, 



