924 EXPERIMENT STATION RECORD. 



some other cause. Observiitions on the physical conditions of the 

 lands, as well as the amount and distribution of the alkali, are reported 

 and discussed. These indicate that while in many cases the injury to 

 the trees was probably due to the direct action of the alkali, in some 

 cases it was brought about by unfavorable physical conditions, due in 

 part to the action of the alkali and in part to other causes. The effect 

 of the ditierent alkali salts on citrus trees and means of reclaiming 

 injured orchards are explained. 



Analyses of a large number of samples of alkali soils from different 

 localities are reported. 



Preliminary account of the soil survey -work in North Carolina, 

 B. W. KiLGOHE {Bid. North Carolina Staie Bd. A(/r., 21 {1900), No. 

 11, pp. 3-5). — A brief account is given of the progress made by the 

 State Department of Agriculture, cooperating w ith the Division of 

 Soils of this Department, in examining and mapping the soils of a dis- 

 trict 105 miles long and 8 miles wide, reaching from Raleigh to New- 

 born. In this survey the surface and subsoils have been examined 

 with reference to their general character, the size and character of the 

 particles, and the amounts of fertilizing constituents present, and the 

 extent and exact location of each type of soil has been mapped. The 

 work has shown that "omitting the section iunnediately around Raleigh 

 and the more or less sw^ampy or pocosin soils farther east . . . there 

 are three large classes of soils in the east, each class having a number 

 of varieties." The main classes are deep sand}^ soil, sandy loam with 

 clay subsoil, and fine sandy loam with clay subsoil. It is proposed to 

 make this survey of the soils the basis for experiments to determine 

 the fertilizer requirements of the different soil types, and two test 

 farms have already been established for this purpose. The plan of 

 experiment followed and the results of the first year's operations are 

 noted elsewhere (p. 1)41). 



The Illinois glacial lobe, F. Leverett ( U. S. Geol. Survey Mono 

 graph, 38 {1899), ])p. XXI +8 17, pis. U, figs. 5).— This monograph 

 reviews earlier studies, describes the plan of investigation pursued by 

 the author, and reports in detail the results of his studies of the Illinois 

 glacial lobe, which "formed the southwestern part of the great ice 

 field that extended from the high lands east and south of Hudson Bay 

 southwestward over the basins of the Great Lakes and tlit^ north- 

 central States as far as the Mississippi Valle3\ It overlapped a pre- 

 viously glaciated region on the southwest, whose drift was derived 

 from ati ice field that moved southward from the central portion of 

 the Dominion of Canada as far as the vicinity of the Missouri River." 

 The phvsical features of the region are described and the time rela- 

 tions or glacial succession of the various drift sheets are discussed. 

 The evidence for separating the Illinoisan drift sheet from the outlying 



