70 THE SUGAR BEET. 



White Silesian Rose-top (fig. 4) (Bettrave race Fran- 

 caise collet rose). — This type has become very popular 

 of late. The skin is white under ground, and the neck, 

 exposed to the air, rose ; has no extra roots. The 

 leaves are abundant, and the yield is considerable, this 

 being to the hectare 70,000 kilog., yielding 10 to 12 

 per cent, of sugar. According to Vilniorin the greatest 

 yield in sugar extracted from the same was 8881 

 kilog. (19,538 lbs.) to the hectare (two and a half acres). 



The French were not contented with the varieties just 

 mentioned, but have several others, " varietes houteuse" 

 and " demi-bouteuse f^ easily extracted from the soil ; 

 grow partly out of the ground, but contain much less 

 sugar, and give a larger yield to the acre ; under these 

 conditions but few advantages are gained over the 

 ordinary mangel wurzel. 



White Sugar Grayish-top (fig. 5). — This variety is 

 but little used for beet sugar manufacture. It is very 

 large, and grows two-thirds out of the ground. The 

 neck is green and the skin gray ; yield j)er hectare 

 (two and a half acres) 110,000 kilog. (242,000 lbs.) as 

 a maximum ; contains about 6.50 per cent, of sugar. 

 It is considered that with proper selection of seeds 

 great improvements might be obtained. 



Improved Yilmorin^ (Bettrave blanche am^lioree 

 Yilmorin). — The first type was brought to notice in 



' Mr. Vilmorin has rendered in this case and in many others an immoiise 

 service to the beet sugar industry in France. 



