14 



BntomologtY, J. p. Campbell, Ph. D. (pp. 82-89, illiistrated). — 

 Accounts of the cotton caterpillar [Aletia argillacea), potato sphinx 

 {Phlegethontius celeus), aud twig girdler {Oncidercs cingnlatus), with 

 suggestions as to remedies. 



Southern drift and its agricultural relations, J. W. Spen- 

 cer, Ph. D. (pp. 90-94). — A description of the geological formations 

 known as " Southern drift," especially as they are found in Georgia. 

 It is expected that the agricultural relations of these formations will 

 be discussed in a future article. 



Illinois Station, Bulletin No. 8, Fel)ruary, 1890 (pp. 75). 



Field experiments with corn, 1889, T. F. IIunt, B. S. (pp. 214- 

 272). — The experiments here rei^orted in detail are a continuation of 

 those recorded in Bulletin No. 4 of this station, an abstract of which 

 may be found in the Experiment Station Record, Vol. I, No. 1, pp. 

 28-33. "These experiments were made on good prairie soil in eastern 

 Illinois, just north of the fortieth parallel of latitude. The year 1888 

 was an unusually favorable one for the corn crop; 1889 was much less 

 favorable, there being deficient rain-fall in April and May, excessive 

 rain in June, and an average temperature below normal during the 

 summer months." 



Experiment No. 1 — Corn, testing of varieties (pp. 214-246). — Over sixty 

 varieties, nearly all dent and including many of those used in 1887 and 

 1888, were tested in 1889 on eightj^-nine plats of 2 by 2 or 2 by 10 rods 

 each, 5 acres in all. The results, as in the similar exi^eriment previously 

 reported, are given in detail in tables, with classified descriptions, sum- 

 maries, general notes, and a meteorological record of the growing sea- 

 son of 1889, Previous experiments are also taken into account in com- 

 paring the different varieties. Attention is called to the desirability of 

 making the tests of varieties on duplicate plats. 



It was shown that there was a difference in 1888 of over 9 bushels per acre between 

 the two duplicate plats of Leaming on tract a aud of 2^ bushels on tract h. The 

 difference between two plats of Burr's White on tract a was nearly 6 bushels, and 

 on tract c nearly 7 bushels per acre. In 1889 Learning and Burr's White were again 

 selected for a duplicate test. As in 1888, the plats of each tract were more than usually 

 uniform to all appearance, and care was taken to have the conditions as nearly iilike 

 as possible. With Leamiug the differences ran on tract o from less than 1 bushel 

 to 12 bushels; on tract h from about 2 to over 5 bushels. With Burr's White on 

 tract a the difference was 12 bushels, but on tract h 27 bnshels. This last is un- 

 usual, aud was due to the number rather than the size of the ears produced. Differ- 

 ences of 5 to 10 bushels per acre may arise from uncontrollable variations in condi- 

 tions, while greater variations may occur from such sources. lu the averages of the 

 two varieties there was a diii'erence of about 18^ bushels in favor of tract h ; in 1888 

 tliere was a difference of C^ bushels in favor of the same tract. 



For 18S8 the varieties were divided into larhj maturing, which ripened that season 

 in one hundred .and twenty -five or less days from date of jjlautiug; nudium matiirin<i, 

 which ripened in from one hundred and twenty-five to one hundred and thirty-five 

 days; late maturing, which ripened in from one hundred aud thirty-live to one hun- 



