to deaden the smell of the seeds, and so prevent their de- 

 tection. To test this point the following sxper.i.nniit *-iras 

 made: 

 Re&lilts of P & S No. 8: 



A nursery "bed similar to that of P & S 7 was made 

 mouse proof and sown to 46 seed spots, each with 3 seeds 

 covered 1/2". Ten spots were left unmulched, and various sorts 

 and amounts ot mulch were used on the other spots. The nun* 

 ber of seeds which germinated per spot indicated the effi- 

 ciency of the mulch in protecting during the period the 

 spots were exposed to the attack of a mouse turned into the 

 bed. 



The mulch did not prove effective protection, "but 

 it apparently had a slightly "beneficial effect , at least 

 when its depth was over 3/4". The following is a comparison 

 of mulched spots with layers of mulch 3 A" to 1-1/2" deep, ant,'. 

 unmulched spots. There were ten of each. 

 Class Seedlings per spot Spots with seedlings 



I'ulched VAn. 0, Kax, 5, Av. 1.4 $0$ 



Unmulched Mi.n. 0. I Sax, 1, Av .4 40^ 



All of tilt; umiuiched epcts and 6p^ of the above 

 mulched s^cts load been dug into by the mouse* No evidence 

 of digging was found in four of the well-mulched spots, 

 biro is ib not certain that they were unmolested. The spot 



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