56 Eighteenth Report State Entomologist of Minnesota — 1920 



/or the promotion of agriculture a)id agricultural industries. Kiev, 191 3- 

 i4 p. (Original article not seen. Abstract in Rev. appl. ent., Series A. 

 Agriculture, vol. i, p. 4go.) 



4. Woodhouse, E. J., and Dutt, H. L., 1913. Further work against surface 



caterpillars at Mokameh in 1912. Agr. jour. India, vol. 8, pt. 4, October, 

 19 1 3. PP- 372-389. 



5. Hartzell, F. Z., 1919. Comparison of methods of computing daily mean 



temperatures : effects of discrepancies upon investigations of climatologists 

 and biologists. A^. )'. State Agr. E.vp. .Station (Geucz'a) Technical bulletin 

 68, June, 1919. 35 p., illus. 



6. Yule, G. Udney, 1919. An introduction to the theory of statistics. Fifth 



Edition. London, Charles Griffin and Co., 1919. 



7. Blair, Thomas Arthur, 1918. Partial correlation applied to Dakota data 



on weather and wheat yield. Mo. ll'eatlier Reznezi', vol. 46, No. s, February, 

 19 18. pp. 71-73. 



8. 1919. A statistical study of weather factors aflfect- 

 ing the yield of winter wheat in Ohio. Mo. Weather Reviciv, vol. 47, 

 No. 13, December, 1919. pp. S4i-847. 



