29 



Plan of the Experiment Field of the Division of Pathology and Physi- 

 ology, drawn to scale. The trees have been drawn to scale to show the original 

 condition of the field as nearly as possible. The right hand half of the field 

 carried a heavier growth of trees than the other half, and moreover horses were 

 formerly in the habit of camping under the trees of this part of the original field, 

 as the trees there afforded better shade in the daytime. These facts rendered 



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this part of the field less suitable for experiments. Accordingly the first year's 

 planting has been confined to the other and less objectionable portion. This course 

 leaves the experiments as little as possible under the uneven influence of these 

 former factors, and gives the best conditions possible under the circumstances. 

 Laud newly cleared and newly cultivated nearly always presents these unevenesses, 

 and on that account, unless fallowed for a sufficient length of time, is more 

 unsuited for many classes of experiment work. 



The plan is lettered and fully explains itself. 



