6i 



SOWN APR. II. 



48. Lathyrus sativus {Gesse). — Michigan Experiment Station. 



100 seeds in seed-pans, j^ inch deep in sand. 



No. I, heavy seeds, (7.1 grains). 



No. 2, light seeds (3.27 grains). 



SOWN APR. 8. 



Epitome. — Light .seeds in each case spronted more rapidly than 

 heavy ones, while in the beans they gave 16 per cent, higher total 

 sprouting. 



CONCLUSIONS From Many Tests upon the Influences of Weight of 



Seed upon its Sprouting. 



1. Variations in results of testing, both as regards rapiditj' of 

 sprouting and the total amount, may be expected between seeds 

 of different weights in the same sample. 



2. This variation is much greater in some species than in others. 

 In our tests, the variation was particularly marked in cabbage, 

 radish, sweet pea, bean, gesse {Lathyrus sativus), burnet {Poter- 

 iuni Sanguisorba), martynia, orach, 



3. As a rule, the heaviest seeds in any sample give earliest and 

 highest results. 



4. In some cases, the lightest seeds in the sample give earliest 

 and highest results, apparently because the heaviest seeds, with 

 which they are compared, are over-ripe ; or, in some instances, un- 

 der-maturity may result in earlier germinations, and such .seeds 

 are sometimes light in weight. 



