222 BULLETIN NO. 62. 



with reference to species and the distance apart of rows and 

 trees. The species number eighteen, and at the first setting- 

 there were 22,010 individuals. The stock first set was composed 

 mostly of hardwood trees a year old. Unfortunately the young- 

 trees came from the nurseries in poor condition, and about 

 thirty-five per cent of the whole number of plants died the first 

 year. The dead trees were replaced in the spring- of 1898, 

 with conifers, so that now the number of hardwood and conifers 

 is about equal. The trees at this time, the beginning- of their 

 third year, are thrifty and the whole experiment looks 

 promising 1 . 



SPECIES TESTED. 



No satisfactory arrangement of the species herein described 

 comes to mind, and the order in which the descriptions appear 

 is simply that of the note-book, in which the species are placed 

 with reference to their position in the experiment plat. The 

 nomenclature, both scientific and vernacular, is larg-ely that of 

 Sud worth's Check List of the Forest Trees of the United States. 

 The measurements given were made in June, 1899. The cir- 

 cumferences were taken, uniformly, at two feet and a half from 

 the ground. The heights are from the ground to the tips of the 

 trees. A description of the wood, including- its weig-ht per cubic 

 foot, is thoug-ht to be of value and is given where possible, the 

 data for which comes mostly from Sargent's Silva of North 

 America. 



THE POPLARS. 



Out of the great number of species of the poplar to be found 

 in this country, wild and cultivated, we have but nine on 

 the Station grounds. The nine, however, include most of the 

 kinds that are of much value for planting- in the sub-arid region. 



The poplars are not considered by tree-planters at large to 

 "be especially useful or beautiful trees, but in this part of the 

 west some of them, judiciously employed, are of very great value. 

 The several qualities that commend the poplars to the planters 

 of this region, are: that they are hardy, standing cold and heat 

 and drouth; that they thrive in most soils and situations; grow 

 very rapidly; and are easily propagated and endure transplant- 

 ation well. In no other trees are these qualities so well combined. 



