1010] MKTEOROLOCJY. 511 



suitable containers until the reaction is complete, and then washing the result- 

 ing carbon free from acid. The best results have been obtained by osing it as 

 a filtering layer instead of mixing the liquor to be decolorized with the carbon 

 and then removing the carbon by filtration. It Is said thai along with the par- 

 tial removal of color there is an almost complete re val of the flavors peculiar 



to raw cane juice, and of most of the scale-forming material, The Altered 

 juice is said to evaporate very rapidly. 



The preparation and restoration of carbon filters for the purification of 

 sugar, Daude (Ztsehr. Ver. Dent. Zuckerfa&ua., \<i. 150, II (1918), pp. 151 ..'?•<, 

 figs. 12). — This Is a revriew of German patent literature on carbon filters for 

 sugar purification. 



The utilization of seeds of pears and apples for the extraction of oil, 

 A. Tuikiik (Tie Agr. et Rurale, 9 (1919), No. 6, pp. 101-105, figs. 2).— The 

 author reviews the literature on the subject, and concludes thai while the con- 

 tent in oil of apple and pear seeds is comparatively blgh, the extraction would 

 not be practical under normal conditions. 



METEOROLOGY. 



Periods of plant growth and rest ( U. 8. Dept. Agr., Nat. "Weather and Crop 

 Bui., No. S3 (IMS), pp. 2, 3, 7, fig. 1).—A chart, showing the general rest 

 periods of most plants in different sections of the United States, as determined 

 by the average time In months between the first month in fall and the lust in 

 spring, inclusive, with a mean temperature below 49° F., is given and briefly 

 discussed. 



Climatological data for the United States by sections (U. S. Dept. Agr., 

 Weather Bur. Cliwat. Data, 5 (1918), Nos. 9, pp. 202, pis. 5, figs. 2; 10, pp. 202, 

 lils. 5. figs. 2). — These volumes contain brief summaries and detailed tabular 

 statements of climatological data for each State for September and October, 

 1918, respectively. 



Meteorological observations at the Massachusetts Agricultural Experi- 

 ment Station, J. B. OsTBANDEB and A. L. Chanoleb (Massachusetts 8ta. Met. 

 Kills. 361-362 (1919), pp. 4 each). — Summaries of observations at Amherst, 

 Mass., on pressure, temperature, humidity, precipitation, wind, sunshine, cloudi- 

 ness, and casual phenomena during January and February, 1919, are presented. 

 The data are briefly discussed in general notes on the weather of each month 



Meteorological records for 1917 (New York State Sta. Rpt. 1911, pp. 111- 

 788). — Tables are given showing tridaily readings at Geneva. N. V.. of standard 

 air thermometers for each month of the year; daily readings of maximum and 

 minimum thermometers at C p. m. for each month of the year; a monthly sum- 

 mary of maximum, minimum, and standard thermometer readings for the year; 

 monthly and yearly maximum and minimum temperatures from 18S3 to 1917, 

 inclusive; average monthly and yearly temperatures since 1SS2 ; and rainfall 

 by months since 1882. 



The exceptional drought of the summer of 1918 in the Gironde region, 

 M. F. Coubty (Compt. Rend. Aead. Agr. France. .', (WIS), No, SO, pp. 84$, 

 841). — It is shown that the drought of the summer of 1918 was the most 

 severe and disastrous that has occurred during the period of 70 years, 1S49- 

 1918. 



[Meteorological review for the region of Paris], C. Flammvkion (Ann. 

 Astron. et M&. [Paris], 55 (1919), pp. 203-205, 305-338, figs. IS).— Tables are 

 given which show the normal daily temperature of each month based upon the 

 records of the Paris observatory for the 50 years 1841-1891, and monthly and 

 annual temperature and precipitation 1873-1918. The climatology of 1917 In 



