1922] DENNY—FRUITS 57 
4. Analyses of fruits taken from different orange, lemon, and 
grapefruit trees are given, showing the variability of the fruits of 
different trees with respect to brix of juice, percentage of sugar, 
acidity, etc., and the values of the probable errors that such 
variability produced. 
The writer wishes to express appreciation to Mr. E. M. CHACE 
and Mr. C. G. Cuurcu for cooperation in obtaining the analytical 
data and for criticism of the manuscript. 
UNITED STATES DEPARTMENT OF AGRICULTURE 
LABORATORY OF FRUIT AND VEGETABLE CHEMISTRY ° 
Los ANGELES, CAL. 
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composition of expressed apple juice, and a naam of the sampling 
error of such juice. Biochem. Jour. 13: 272-277. 
- MELtor, J. W., Higher mathematics for students at ee and physics. 
New ed. London: IQIQ. 
- Merriman, M., A text-book on the method of least squares. New York. 
1913. 
6. Peart, R., and Miner, J. R., A table for estimating the probable signifi- 
cance of statistical constants. Maine Agric. Exp. Sta. Bull. 226. 1914. 
7- Roprnson, G. W., and Lioyp, W. E., On the probable error of sampling 
in soil surveys. Jour. Agric. Sci. 7: 114-153. 1915-16. 
8. SHaMEL, A. D., Scort, L. B., Pomeroy, C. S., and Dyer, C. L., Citrus-fruit 
improvement: A study of bud variation in the Eureka lemon. U. S. 
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9. Tortey, H. R., The theory of correlation as applied to farm-survey data 
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11. Woop, T. B., The pe es - -experinuentel results. Jour. Bd. 
Agric. (London) Sup. 7: 15-37. 1911. 
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