BOTANY. 419 



Estimation of urea in urine, A. Jolles {Ztschr. Analyl. Chem., 39 {1900), No. 3, 

 pp. 137-14o) . 



The iodin and bromin values of oils and fats, R. Williams {Jour. Soc. Chem. 

 Ind., 19 {1900), No. 4, pp. 300, 301). 



Notes on linseed oil analysis, P. C. McIlhiney {Jour. Soc. Chem. Ind., 19 {1900) , 

 No. 4, PP- 320, 321) . 



On a new general reaction for albuminoid substances, A. P. Lidop {Zlmr. 

 Russ. FIz. KJiini. Ob.'<hch., 31 {1899), p. 7 SI; uha. in Bid. Soc. Chim. Parh, 23 {1900), 

 No. 13, p. 622) . 



The composition of the albumin of the seed of the honey locust (Gleditschia 

 triacanthos) , ]M. Goket {Comjd. Rend. Acad. Scl. Paris, 130 {1900), No. l,pp. 60-63). 



Gypsum and limestone, G. W. Shaw {Oregon Sta. But. 62, pp. 14-17). — Descrip- 

 tions and analyses are given of 12 samples of gypsum and 19 samples of limestone, 

 mainly Oregon products. 



On an improved absorption apparatus for use in the analysis of essential 

 oils, A. C. Chapman and H. E. Burgess {Analy.^t, 25 {1900), Aug., pp. 197-199, 

 fig- !)■ 



A platinum crucible for the determination of alkali according- to Lawrence 

 Smith, J. KoxKiSBEKGER {Chem. Ztg., 24 {1900), p. 690; abs. in Clieni. Centhl., 1900, 

 II, No. 12, 2>. 6S9). — Instead of the deep crucible ordinarily used, the author employs 

 a crucible of the usual form with a close-fitting cylindrical cover for the fusion of sili- 

 cates with calcium carbonate and ammonium chlorid in the determination of alkalies 

 according to Smith's method. 



An addition to the apparatus used in the estimation of nitrogen by the 

 Kjeldahl method, H. Mehring {Ztschr. Anali/t. Chan,., 39 {1900), No. 3, pp. 162, 

 163). — Instead of a bulb tube to connect the distilling flask with the condenser, the 

 author uses a wide tube bent twice at obtuse angles in opposite directions, with each 

 end drawn out to make connection. The end connecting with the flask is straight, 

 narrow, and vertical, and in it will form a column of water that will wash the vapor 

 forced through the condenser. The end connected with the condenser is in the shape 

 of a swan's neck. This ai^i^aratus is claimed to be durable and efficient. — c. b. 



WILLIAMS. 



Asbestos filters, O. Lohse and P. Thomaschewski {Ztschr. Analyt. Chem., 39 

 {1900), No. 3,2)p. 15S-161). — To test the value of the Lohse asbestos filter the authors 

 have made many estimations of silver, barium, chlorin, nickel, and sugar (reduction) 

 with closely agreeing results. — c. b. williams. 



A modification of the Bunsen vacuum pump, M. H. Ittner {Amer. Chem. 

 Jour., 24 {1900), No. 3, pp. 253-255, Jig. 1). 



BOTANY. 



Report of the botanist, C. E. Bessey {NehrmTia Sta. Rpt. 1899., pp. 

 28-SJf,). — This report contains notes on various plant diseases, poisonous 

 plants, weeds, grasses, forage crops, and the trees of Nebraska. The 

 occurrence of carnation rust is noted, and its prevention by proper 

 management of carnation houses is predicted. A potato disease which 

 produces brown discolorations within the tuber, eventually destroying 

 it, is reported to be rather widespread throughout the State. The 

 author plans to continue his studies on this disease until able to make 

 some definite suggestions regarding its nature and means of eradica- 

 tion. At present it is suggested that in planting no tubers showing 

 any well-marked brown discolorations should be used. Investigations 



