154 HARNESSING THE EARTHWORM 



answer to this question, and in the affirmative ; although the con- 

 tents of this book, with the instances and experiments cited, are 

 obviously not familiar to the writers of "The Chemical Compo- 

 sition of Earthworm Casts." The same comment applies to the 

 concluding statement in the "Summary" by Doctors Lunt and 

 Jacobson, which reads: "Conditions favorable to the worms, 

 however, are at the same time favorable to plant growth, and 

 quantitative measurements under field conditions of the part the 

 worms play in crop production have not as yet been obtained." 

 As a further comment on this last quotation, we may point out 

 that the field soil samples reported on in this bulletin were col- 

 lected from the farm of Mr. Christopher M. Gallup. We con- 

 sider that the experience of Mr. Gallup in increasing his pro- 

 duction of corn from 80 bushels per acre to an average of 196 

 bushels per acre as at least one startling example of what can 

 be accomplished through ''earthworm tillage." 



In the following pages we give the report of Doctors Lunt 

 and Jacobson in its entirety, with the valuable list of reference 

 books at the end of the report. 



