668 EXPERIMENT STATION RECORD, 



2, p. 13). — The fat is thoroughly mixed with water or some aqueous alkali-free solu- 

 tion at over 31° C, and from the rapidity with which the fat separates aud its 

 physical properties, its nature is determined. Salt solution can he used in place of 

 pure water ; and various tests can bo made on the separated fat. 



A color reaction of peanut oil, A. van Engelen {BuJ. Assoc. Beige Chim., 1896, 

 No. 4). 



Note on the microscopic detection of beef fat in lard, T. S. Gladding 

 {Analyst, 21 {1896), Oct., p. 254). — The author ohtaius crystals of beef stearin of 

 good form and size by crystallizing from a mixture of alcohol and ether (10:5). — 



B. W. KILGORE. 



The introduction of standard methods of analysis, H. J. von Jonstorff 

 {Chem.Neics, 74 {1896), Xos. 1917, p. 89; 191S, p. 101; 1919, p. 118; 1921, p. 143; 1922, 

 p. 159; 1923, p. 170). 



A new form of potash bulb, ^I. Gomberg {Jour. Amer. Cliem. Soc, 18 {1S96), No. 

 11, pp. 941, 94..', fuj. 1). — Much simpler than Geissler's. It may be easily haudled 

 and wiped, will stand without support, and can be weighed without being sus- 

 pended. — F, AV. morse. 



A modified form of the ebullioscope, H. W. Wiley {Jour. Amer. Chem. Soc, 18 

 {1896), No. 12, pp. 1063-1067, ficj. i).— The difficulties attending the use of the ebul- 

 lioscope in determining alcohol in wine and beer are discussed, and a description is 

 given of a form of the apparatus devised to overcome the difficulties. — f. w. morse. 



A filter flask, W. Diamond {Chem. News, 74 {1896), No. 1933, p. 283). 



Rapid measuring pipette, E. L. Smith {Jour. Amer. Chem. Soc, 18 {1896), No. 10, 

 pp. 905, 906, fuj. 1). — An apparatus for quickly measuring successive, equal volumes 

 of a solution, when great accuracy is not required ; it may be prejiared from ordinary 

 laboratory stock. — F. w. morse. 



BOTANY. 



Investigations concerning the formation of albuminoids in 

 plants, T. KosuTANY {Landw. Vers. 8ia., 48 {1896), ¥0. 1, pp. 13-32).— 

 The effect of assimilation aud its associated processes upon the pro- 

 duction of albuminoids in the plant has been investigated. The mate- 

 rial studied was leaves of a wild riparia grape. In order to get por- 

 tions that would be comparable, the leaf blade was quickly cut along 

 the midrib with scissors and half removed between 2 and 3 p. m., the 

 other portion at about 3 a. m., and analyzed. The combined nitrogen, 

 the albuminoid nitrogen and other nitrogenous compounds, the acid aud 

 sugar content, and the ash were determined, the methods for the analy- 

 ses being given. The exi^eriment was continued from June 21 to 

 August 30, 1894, and the results are given in detail. 



The total nitrogen compounds fell off about one-fourth between the 

 first and last dates given. The combined nitrogen content was greater 

 at night than in the day, while there was less nonalbuminoid nitrogen 

 compounds at night. Ammonium salts were found more abundant at 

 night. The leaves contained a greater amount of nitric acid in the 

 day than at night. The portions of leaves collected at night were 

 found not to contain any asparagin. It appears that while the raw 

 material for albuminoid formation is most abundant in the day, yet there 

 is a greater conversion of this material during the night. More sugar 

 is present in the leaves during the day than at night, while the greater 

 content of the free acids is found at night. 



