largest questions of physical tion involves, indeed it cont it determines all climatic con tion by means of irrigation is hydrographic area. Incidentally, the questions and of arboriculture, on the been brought out to some ex facts upon these subjects, so vation, experience, experime been measurably successful. and observations that shed n ing a broader idea of the imp value to a very large area of capabilities but small accoun developed by the facts herei able arid lands within the b speaking, quite moderate in area, embracing at least onewater supply, whether subte precipitation, is both inadequ The eastern boundary of t to be the one hundredth m .boundary may be in part pla |