II CONTENTS. 



Page. 



Two new speciesof plants from the Northwestern United States, Ij. F. Henderson. 24 

 Hesperogenia, a new genus of UmbelUferje from Mount Kainicr, J. M. Coulter 



and J. N. Rose 24 



Three new species of Tradeseantia in the United States, J. N. Rose 24 



Treleasea, a new genus of Conunelinacea?, J. N. Rose 24 



Lists of trees and shrnl)s on the grounds of Purdue University 24 



The origin and early development of the flowers of the cherry, plum, apple, 



and pear, E. S. Goff 22 



Comparative hardiness of flower buds in the cherry, E. S. Goff 2:5 



Yellow coloring matters accompanying chlorophyll and their spectroscopic 



relations, C. A. Schunck 23 



METEOROLOGY. 



Annual summary of meteorological observations in the United States, 1899 ... 25 



The climate of San Francisco, Cal., A. G. McAdie and G. H. Willson 27 



The meteorology of Ben Nevis in clear and in foggy weather, J. Y. Buchanan. 27 



Meteorological observations, J. E. Ostrander and A. C. Monahan 28 



Meteorological record 28 



SOILS. 



The soluble salts of cultivated soils, F. H. King and J. A. Jeffery 28 



The character and treatment of swamp or humus soil, F. H. King and J. A. 



Jeffery 32 



Percolation and evaporation from long columns of soil, F. H. King 34 



The utilization by plants of the potash dissolved in soil water, T. Schloesing. . 36 

 Catalogue of the tirst four thousand samples in the soil collection of the Divi- 

 sion of Soils, M. Whitney 36 



Treatment of swamp or humus soil, F. H. King and J. A. Jeffery 36 



Readings of soil thermometers 36 



FERTILIZERS. 



The utilization of stable waste, AV. H. Birchmore 37 



Investigations on the influence of nitric nitrogen and ammoniacal nitrogen on 



the growth of maize, P. Maze 37 



Analyses of commercial fertilizers, W. F. Hand et al 38 



Analyses of commercial fertilizers, H. J. Wheeler and B. L. Hartwell 39 



Rei)ort of fertilizer department, J. P. Smith 39 



Rejiort of chemist, M. B. Hardin 39 



Analyses of licensed commercial fertilizers, 1899, F. W. WoU and A. Vivian.. 39 



FIELD CROPS. 



The influence of the right amount and right distril)ution of water in crop pro- 

 duction, F. H. King 40 



Continued effects of fertilizing the soil, W. C. Latta 41 



Variety tests of grains, R. A. Moore 42 



Machine and hand-threshed cereals f(jr seed, H. C. Schellenlterg 42 



Russian cereals adapted for cultivation in the United States, M. A. Carlcton. . . -4.5 



The nitrogen fertilization of barley for brewing, T, Remy 42 



Report on culture ex])eriments with barley at the Berlin Experimental Insti- 

 tute for Brewers, von Eckenbrecher 43 



Forage crops, W. B. Anderson 4.5 



The influence of heredity upon vigor in the potato, E. S. Goff 43 



