METEOROLOGY. 869 



1891,1 and forms a valuable contribution to the subject of ajiricultural 

 meteorology. A previous report summarized the results obtained in 

 1891 and 1802. Tlie present article adds data obtained in 189;;-'<)5, 

 and summarizes tlie results during the entire period. The more recent 

 work has been ])roa(ler and more exact than the earlier, including in 

 addition to observations on precipitation and temperature a record of 

 observations on sunshine and soil temperatures. The more recent 

 observations, however, have been confined to one locality, Schlanstedt 

 although a wide distribution of points of observation is advocated by 

 the author. Detailed data relating to the growth and yield and qual- 

 ity of crop on the one hand and to meteorological conditions on the 

 other are tabulated and fully discussed. 



Observations on the crop relate to the beginning and end of i>lant- 

 ing; the beginning and end of thinning; the beginning and end of 

 the beet-sugar making campaign, including the beginning and end 

 of the digging of the beets for storage; the length of the period of 

 growth; the yield and quality (percentage of sugar) of the beets; and 

 the total production of sugar. 



I'recipitation was measured with a gauge placed 1..") meters above 

 the soil. The temperature was recorded from daily readings of exj)osed 

 maximum and minimum thermometers placed 5 cm. above bare soil. 

 Soil temperatures were determined at a depth of half a meter. Sun- 

 shine was recorded with Campbell's sunshine autograph. The results 

 may be briefly summarized by years as follows : 



1S91. — The planting was delayed and therefore the period of vegeta- 

 tion was short. The development of the beets was very slow during 

 the wet and cold June, which delayed the work of thinning (ended 

 June 30). There was an insufficient amount of sunshine during the 

 whole period of growth. An average yield was obtained, but the beets 

 were of poor quality. 



1893. — Precipitation was normal and well distributed, and as sui)i)le 

 mented by the moisture already in the soil was sufticient. The ])laut- 

 ing was season.able, but the develoi>ment at first was rather slow, <lue 

 to insufticient heat during April and May. Afterward, during Jun«' 

 and July, the temperature was normal and the growth was more favor- 

 able. The remainder of the season was warm and the a mount and (lis 

 tribution of sunshine was favorable to vigorous growth, liot h the yield 

 and (juality of beets were excellent. 



:1S9:}. — Planting was doiu"! in good scnison and the initial growth of 

 the plants was rapid, but their later development was checked by 

 insufficient rainfall. Heavy rains in October caused a reduction of the 

 sugar content. The yield of beets, therefore, Avas small and the (piality 

 poor. 



180-i. — The results in this year are dillicult to explain. The period 

 of growth was very prolonged and the development of the beets was 



' L:in<l\\'. Jnhrl)., 22 (1893), p. 503. 



