323 



Injurious insects, their identiJiGation and extermination (pp. 112-128, 

 illustrated). — A reprint of au article in Bulletin No. 4, pp. o-i9, of the 

 station (See Experiment Station Record, Vol. I, p. 22). 



Ansicers to inquiries (pp. 128-133). — i^otes on 9 species of Insects 

 regardin<^ which inquiries were received at the station in 1889. 



Experiments n-ith insecticides (pp. 133-136). — This contains notes on an 

 experiment in the use of London purple for the codling moth, reprinted 

 from Bulletin No. 8, pp. 15, 10, of the station (See Experiment Station 

 Eecord, Vol. If, p. 49), and on the successful use of hot water and pj-re- 

 thrum powder as insecticides for the cabbage- worm {Pieris rapw). 



Stock feeding, A. T. Neale, Ph. D. (pp. 137-1G3).— A reprint of an 

 article in Bulletin No. 7, pp. 3-24, of the station (See Experiment Sta- 

 tion Record, Vol; I, p. 196), with the addition of a detailed explanation 

 by G. A. Harter, M. A., of the method of the least squares, as applied 

 in determining the cost of the several nutritive constituents of feed- 

 ing stuffs. 



Creameries, G. L. Penny, M. A. (pp. 104-171).— This includes brief 

 notes on investigations by the station regarding ''(1) losses of butter 

 in the separator process ; (2) variations in the creamery value of milk 

 from different herds, and variations in the same herd at different seasons 

 of theyear; (3) buying milk on test — thecomparison of popular methods 

 of testing milk with the standard processes of the laboratory." At the 

 creamery at which the study was made 903 pounds of milk received on 

 a certain day contained 3S.2 pounds of butter fat, from which 35.91 

 pounds of butter were made. " Of the 2.29 pounds lost, 1.19 pounds 

 were in the separated milk and 0.27 pound was in tlie buttermilk. The 

 remaining 0.85 pound was the loss from various accidental sources, 

 errors in weighing, analysis, etc." In other words, per cent of the 

 fat of the milk was lost in the butter making, of which 3.17 per cent 

 must be charged to the separator, 0.7 per cent to the churn, and 2.13 

 per cent to incidental waste. The results of analyses of the milk of 

 different herds of cows made at four different dates are summarized as 

 follows : 



In the case of twenty-four herds studied it was found that the differ- 

 ence in the amount of butter fat in the best and poorest milk from any 

 one herd on different dates was 20 per cent. " Of the remaining ten 



