CHEMICAL SELECTION OP MOTHERS. 109 



with an installation for 5000 analyses per diem, to work 

 10,000, but with different chemists and general help. 



It is always desirable to have several rooms, and 

 these of a size to permit doubling, if necessary, the 

 work to be done during twelve hours. It is best to 

 have the polariscopic examination in a separate place 

 from where the filtering or sampling is done; not so 

 much on account of being obliged to use an artificial 

 light, as to be away from the noise, which always has 

 a distracting effect upon the observer, who, after an 

 interval of time, becomes more or less fatigued. An 

 ample supply of water in all cases is necessary in order 

 to keep the laboratory thoroughly clean. As stated in 

 previous pages, it is desirable to make the first selection 

 of beets upon the fields, depending entirely upon exte- 

 rior characteristics. It is, however, important to make 

 another selection as soon as the silo is opened, for cer- 

 tain roots always undergo alterations during their 

 keeping. Then, again, other roots are thrown out, 

 owing to their size, shape, etc. This final sorting 

 reduces by nearly one-half the beets which had been 

 selected for analysis after harvesting. The beets 

 remaining are carried by hand or cart, depending upon 

 the country, to the reception-room, which should be 

 very spacious, as frequently 1000 beets are spread out, 

 covering considerable area. It is important to have 

 the reception-room divided into several rooms, thus 

 keeping very superior beets entirely separate. 



It is not necessary to have on hand the whole num- 

 ber of beets for one day's analyses; if for a laboratory 

 suited for 4000 analyses per diem, about 800 beets only 

 need be waiting their turn. This requires eight series of 

 shelving and compartments of 100 roots. These may 

 be arranged in sub-divisions. A, B, C and D, each of 

 which is sub-divided in two series. 



T. „).!„„ A 1 1st series, 1, 2, 3, 4, 5, 6 lOO 



Division A {2d series, 1,2,3, 4, 5,6., 100 



T^■ I ■„„ n( 1st series, 1,2,3,4.5.6 in» 



Division B J 2d series, 1, 2, 3, 4, 5, 6 100 



