36 



CULTURE OF THE SUGAR BEET. 



and 1877, and the temperature and rainfall from September 15 to Octo- 

 ber 15 of the same years, found the following relations : 



We now come to the consideration of the meteorological conditions 

 actually existing in the beet-growing districts of Europe, from a com- 

 parison of which with those of a similar character in our own country, 

 we must determine those sections in which we may enter into the prose- 

 cution of the industry with the greatest probabilities of success. 



A very clear notion of the general conditions of temperature and rain- 

 fall prevailing in the beet-growing districts of Europe may be obtained 

 from the table of curves given in the lower right-hand corner of the 

 European map. 



The curve of rainfall for the north of France and Germany is copied 

 from a table of curves given by Marie Davy;* and the curves of tem- 

 perature and rainfall lor Cambrai, located in the midst of the beet-growing 

 district of France, and for Halle, situated in the .most important sugar- 

 producing section of Germany, are plotted from our own compilations. 



From these we see how closely the deductions made from a study of 

 the recorded conditions compare with those arrived at by Briem, Hana- 

 man, and Deherain, from their cultural experiments and observations. 



It was our intention when starting out with this work to confine the 

 meteorological researches to the conditions of France, but the paucity 

 and irregularity of the records of the climatic conditions of that coun- 

 try forced us to look to other countries for the data we required. In 

 this connection we find the records of Belgium, cared for by the illus- 

 trious Quetelet, more complete in all particulars than those of any other 

 country. From them, as given in his " Meteorologie de Belgique? we 

 have constructed the following tables that will exx>lain themselves: 



Average temperatures in Belgium for the different months. 



' M<$te"orologie et Physique Agricoles. 



