228 



EXPERIMENT STATION RECOKD. 



absorption through the roots. The organization acquired l)y a plant in darkness 

 feebly affects its development in the light. The internodes of plants brought into 

 the light ai-e usually short and large and the leaves larger than normal, especially if 

 in a dry atmosphere. This seems to be due to the activity of transpiration at the 

 time and the leaves drawing the water from the internodes. 



The influence of temperature on the absorption of mineral elements by- 

 etiolated plants, G. Andre {ContpL Rend. Acad. Sei. Park, 134- {1903), No. 11, pp. 

 668-671). — In a previous publication (E. S. R., 12, p. 613) the author has shown 

 marked differences which exist between etiolated plants of maize and lupine which 

 are kept in darkness. In the present paper the experiments are continued with 

 maize and beans, in which the effect of temperatures of 15 and 30° C. on the absorp- 

 tion of mineral elements by etiolated i)lants is shown. Lime, which is most abun- 

 dant in plants etiolated at 15°, is absorbed less abundantly by those which have been 

 kept at 30° C. Potassimn is taken up in the same manner. Phosphoric acid does 

 not show apprecialjle variation from the above, while sulphur in the form of sul- 

 phates, which is present in considerable abundance in beans, is found to lie 2J times 

 as abundant in the etiolated plants as in the seed. In the case of maize the sulphates 

 are 7 times as abundant. Comparing plants etiolated at 15 and 30° C. shows a 

 remarkalile increase in the silicates present at the higher temperature, which is cor- 

 related with an increase of cellulose. 



METEOROLOGY— CLIMATOLOGY. 



Report of the meteorologist, W. H. Bishoi' {Delaware Sta. Rpt. 1901, j)p. 200- 

 206). — Monthly summaries of observations at 3 places in Delaware on temperature, 

 pressure, precipitation, relative humidity, and prevailing winds during the year ended 

 June 30, 1901, are given, with a summary of observations on temperature and jire- 

 cipitation during the calendar year 1900. 



The summary for 1900 is as follows: 



Annual .^lunuiarif of nnieorological observations in Delavarr, 1000. 



Meteorological tables, T. S. Oi'tram {3[inne.wia Sta. Rpt. 1901, pp. 341-340).— 

 Tables prepared by tlie director of the Minneapolis office of the Weather Bureau are 

 given, showing tlie monthly and yearly averages and departures from normal of 

 temi)erature and precipitation, based on observations at some 64: ])laces in Minnesota 

 during the year ended June 30, 1901 . 



Rainfall variations {Science, n.ser., 16 {1902), No. 393, p. 7-5).— This is a brief 

 note on a discussion by Hann« of variations in rainfall during long periods, based on 

 data for monthly and yearly rainfall at Padua, 1725-1900; Klagenfurt, 1813-1900, 



«Sitzungsber. Wien. Akad., Ill (1902), Ila. 



