468 



Repoet of the Hoeticultueist of the 



diagram. Plate I shows the interior of the lettuce-house as ar- 

 ranged for Crops II and III. 



North Bench. 



Plat 



Plat 20 19 18 17 16 15 



South Bench. 



14 



13 



12 



10 



11 



For Crop I each seed was weighed and only seeds of a uniform 

 weight, 1.5 milligrams, were planted. This plan was afterward 

 abandoned because it did not insure as uniform seedlings as were 

 desired for the test. 2 For Crop II the seeds were sown iu each 

 plat in furrows exactly one-half inch deep, no attempt being made 

 to select seeds of uniform weight. They were then covered with 



2 The time required with Crop I for the germination of the seeds is shown 

 for each plat in the following table, together with the measurements of the 

 plants fifty-four days after seed-planting and the percentage of seeds which 

 germinated. It should be compared with Table B, page 470. 



Table A. Germination and Growth of Lettuce Seeds, 

 (crop i.) 



Soil. 



Plat. 



Time required for 

 germination . 



Spivad of plants 



54 days after seed 



planting. 



Average. Variation. Average. Variation. 





« w u » 



<k o top 



Days. Days. 



1. Loam 3 parts 1 11.67 8 to 18 



Sand 1 part 7 8.05 7 to 13 



Manure 1 part 13 9.97 6 to 20 



2. Same weight of loam and 2 9.53 7 



manure as Soil 1 with 8 9.11 7 



twice as much sand 17 9.13 7 



3. Same weight of loam and 3 10.17 6 to 33 



manure as Soil 1 with 9 8 63 6 to 14 



three times as much sand. 15 7.67 6 to 11 



to 14 

 to 14 

 to 40 



Ins. 



5.15 

 7.74 

 7.45 



7.25 

 7.38 

 7.69 



7.53 

 7.37 

 7.65 



Ins. 



3 to 8 

 6 to 9.75 

 4.5 to 9 



5 to 9.50 

 2.75 to 9 

 2 to 9.50 



2 to 9.75 

 3.75 to 9.75 

 5 to 9 



90 



100 



97 



95 

 95 

 94 



95 



85 

 87 



A study of the later records of those plants which germinated most slowly 

 shows that, as a rule, they did not equal plants from earlier germinations 

 either in size or in earliness of reaching marketable maturity. 



