With Mouse 11 two moth balls (napthalene) we;?e crusliej. and 

 put on the soil surface. The first night the mouse dug 

 into the box. "but only went to a depth of 1/2", ani there- 

 fore did not reach the seed, though it seems he must have 

 smelled them; With Mouse 12 a similar test was carried on, 

 but in this case one-fourth teaspoonf ul of iodoform was put 

 in the surface. In one night 4J;J of the seed in the box 

 were dug up. Again, with Fouse 13 a test similar to that 

 with House 11, except that the napthalene was placed in a 

 layer over the seed instead of on the ground sir face, was 

 carried on. Approximately 5^ of ^ e s 66 ^ were eaten in 

 one night. 



In the field seed spotting on Pilot Knob (P & S 2) 

 most of the spots were mulched and a few were left unmulched. 

 Signs of mouse damage were verjr evident in the unmulched 

 spots, and apparently almost absent in the mulched ones. Two 

 spots mjLLched in the mouse-proof nursery bed already mention- 

 ed apparently were not dug into. Ho seedlings came up in 

 these spots, however , and it therefore is not known whether 

 the mulching actually prevented the detection of the sown 

 seed by mice, or whether the debris accompanying the mulch 

 merely hid the evidence of damage. There appeared to be a 

 strong probability, however, that the smell of vegetation -- 

 in mulching might be strong enough and of the right nature 



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