4 EHe econc ,th cc 



labor with 1/4 M is S A it. 



5. It appears, however, that shallow covering 

 is likewise more favorable 



6. li, ie impossible to obtain a uniform density 

 with tills specie iout uniformity in depth of cover, 



no rnntter how evenly the , stributed over the 



sowing aurii.ee. 



Ifhe sec :iafly food stored up for the 



use of its embryo, as soon as germination sets in. 

 food is iii! nufactured I it pierces 



the surface of the soil, uhen the light enables the plant 

 to carry on phot J f2JttHP^ ore * '^ ^ ae sand covering 



is of such depth th&-; I jryo lias used up this stored 



food, it ?/ill die of starvation, &s _ o. It might be 



ited out here, that when we speak of those above the 

 gsaun o present iiit ; &* we L rtially in 



error, for many may have die ion, hut before 



the the eurfe.ee. 



..leans and ceviees for securing a UL-LCT. 

 over the lots have "been worked on, but up to the present 

 time, with no satit^ ring result, . nee the surface of 

 an individual be curved or rolling, a frame for 



gauging the cover cannot be Bet econ<x ty to conform 



to these irregularities of t; , e 



-22- 



