1921] HARRINGTON—GERMINATION 345 
were not determined as to species. In 1914 three lots of seeds 
of Papaver somniferum, three lots of the horticultural variety 
“Shirley” of Papaver rhoeas, and two lots of an undetermined 
species were used. ‘Table III gives the percentages of germination 
of the eight lots which were tested in 1914. In general, the seeds 
of Papaver somniferum were much less sensitive to temperature 
conditions than were the seeds of the other species. Fig. 3, con- 
structed from the averages in table III, illustrates the relation of 
temperature to completeness of germination of the three species 
of Papaver included in the tests of 1914. Fig. 4 shows the differ- 
TABLE III 
GERMINATION OF DIFFERENT SPECIES OF POPPY AT DIFFERENT TEMPERATURES 
GERMINATION 
TEMPERATURE Papaver somniferum |Papaver rhoeas var. “‘Shirley”| . Papaver sp. 
No. | No. | No. | Aver-| No. | No. | No. | Aver-} No. | No. | Aver- 
5440 |250482/250768| ages |250224/250693/250752| ages |250196/250197| ages 
Icebox eee ae SS.l 98) Bek ya ti eet 96 61 9o1 861 88) 9a 
BS Met en even wa 7019904: 041 -O8 ESO) SB) St) 96:1) Oe): 90] 96 
ih er O51 96) G8}. 99) seb 98]. Srl 72) ot | oot 9 
20°... git tesese OO b° 78: FB TT BE Se) 80-1 40 69 
iat a a 52476] Gg). <Gh). 36) 40 at]; 27 1 Say Se 
vig Meee ee S81 98) 64) -67 |: eB Tt 391 36) 287 og] 841. 54 
eae es 10°]. 26 6 14 I ° 2 I ° I I 
ences in germination of three lots of seed of Papaver somniferum with 
different temperatures. The temperature alternation 20°-30° C. 
Tepresents a mean temperature in the blotters of practically 
22.5°C. The equivalent value of these two temperature conditions 
for the germination of larkspur and poppy seeds is evident from 
the results. 
GERMINATION OF POPPY SEED BETWEEN BLOTTERS AND ON TOP 
OF BLOTTERS.—As previously stated, poppy seeds were tested in 
1914 both on top of and between double thicknesses of moist blotting 
paper. In the icebox the average percentage of germination on top 
of blotters was sixty-seven, between blotters seventy-three. At 
15°C. the average percentages were respectively eighty and 
Seventy-five. In the tests with each of the other temperature 
