92 



In threa instances : Secale cereale L. (18), Carex spec. (8), Saponaria 

 oflSoinalis L. (2), Thlaspi arvense L. (5), Capsella bursa pastoris (L.) Monch 

 (10), Trifolium procumbens L. (3), Anthemis arvensis L. (83). 



Twice : Aira praecox L, (7), Urtica urens L. (3), Cerastium arvense L. 

 (10), Ranunculus repens L. (28), Papaver somniferum L. (116), Galeopsis 

 tetrahit L. (1), Staohys arvensis L, (135), Veronica arvensis L. (6), Veronica 

 hederaefolia L. (3), Rhinanthus major. Ehrh., Sherardia arvensis L. (3), 

 Achillea millefolium L. (3), Cirsium lanceolatum (L.) Scop. (11), Centaurea 

 Cyanus L. (15), Lampsana communis L. (5), Thrincia hirta Roth (2), 

 Leoatodon autumnaUs L. (2). 



Once ; Phalaris canariensis L. (4), Panicum sanguinale L. (2), Alopeciurus 

 pratensis L. (4), Deschampsia caespitosa (L.) P.B. (4), Avena elatior L. 

 (4), Dactylis glomerata L. (4), Bromus hordeaceus L. (7), Triticum aestivum 

 L. (8), Luzula campestris (L.) D.C. (6), Arenaria serpyllifolia L. (3), Ranun- 

 culus acer L. (4), R. spec, (1), Glauciiim spec. (4), Raphanus sativus L. 

 radicula Pers, (1), Sisymbrium officinale (L.) Scop, (7), Camelina sativa 

 (L.) Crtz. (5), Lepidium sativum L. (1), Melilotus spec. (2), Lotus comicu- 

 latus L. (4), Geraniijm coltunbinvmi L, (76), Petroselinum sativum (L.) 

 Hoffin, (4), Chaerophyllum temulum L. (3), Anagallis arvensis L. (4), 

 Solanum Dulcamara L. (1), Teucriiun botrys L. (8), Lamium amplexicaule 

 L, (2), GaUiun MoUugo L. (10), Campanula spec, (7), Calendula officinalis 

 L, (93), 



(b) Other impurities. — ^The mineral impurities correspond Xvith the 

 nature of the soil, i.e., they are sandy for the Roosendaal clovers, and 

 consist of brotwi earth in the samples from Groningen and the districts of 

 the Meuse, 



(c) Colour. — The coloiu:-test, made with 1,000 grains of each sample, 

 gave the following average results : — 



(d) 1,000 grain-weights. — The samples gave the following weights ; 



From the above it would appear that the Roosendaal clover is the 

 heaviest in grain ; the collective average is 1 • 87 grammes. 



