[dymond] ELFAATOR SCREENINGS 77 



Composition of Elevator Screenings 



Following is the analysis of a sample taken from a carload of 

 screenings made up to represent the average run of screenings as cleaned 

 from grain at Fort William and Port Arthur and before any separation 

 or cleaning had been done. This is the same carlot as that referred 

 to on page 84. 



Wheat ■ 32 % 



Oats 2-6% 



Flax (including broken pieces) 6'1% 



Wild oats (Avena fatua L.) 2-8% 



Wild buckwheat (Polygonum Convolvulus L.) 11-7% 



Lamb's quarters (Chenopodium album L.) 20-2% 



Wild mustard (Brassica speciesf) ( 91)i ' 1-8% 



Other Cruciferae seeds* 2-5% 



Conringia orientalis (L.) Dumort (53 )^ 



Sisymbrium altissimum L (341) 



Erysimum cheiranthoides L (28 ) 



Neslia paniculata (L.) Desv (13 ) 



Thlaspi arvense L ( 14 ) 



Lepidium apetalum Willd (11 ) 



Camelina sativa (L.) Crantz (8 ) 



Camelina dentata Pers (1 ) 



Other sorts 2-2% 



Chaff 18-1% 



fThe identification of the seeds of the various species of Brassica is not possible 

 except by microscopic examination of sections of the seed coats. 



Besides Brassica arvensis (L.) Ktze., Brassica nigra (L.) Koch, and Brassica 

 campestris L. are reported by Clark and Fletcher to be common in the West. 

 *The following are also occasionally found in screenings: — 

 Capsella Bursa-pastoris (L.) Medic. 

 Sisymbrium incisum Engelm. and varieties. 

 Erysimum parviflorum Nutt. 



" asperum DC. 

 Arabis gladra (L.) Bernh. 

 ^The numbers in brackets indicate the relative prevalence by number of the 

 different sorts. The numbers employed are the actual numbers of the various kinds 

 of seeds found in the portion examined in making the analyses. 



The seeds which would be classed as "other sorts" in such an 

 analysis as is reported above include a wide variety of which the 

 following are more or less prevalent. 



Panicum capillare L. 

 Setaria viridis (L.) Beauv. 

 Phleum pratense L. 

 Lolium temulentum L. 

 Agropyron tenerum Vasey 



