January 26, 190G.] 



SCIENCE. 



141 



at the Chemists' Club, 108 West 55th Street, 

 on Friday, December 8. Messrs. Dr. Wm. J. 

 Schieffelin, Dr. F. D. Dodge, Hugo Schweitzer, 

 T. J. Parker and Leo Baekeland were elected 

 councilors and the following papers were read : 



The Biological Effects of Radium: Gustave 



M. Meyer. 



A resume of the results of the investigations 

 carried out at the suggestion of Dr. Gies by 

 Drs. Gager, Burton-Opitz and Meyer and 

 Messrs. Berg, Welker and Hussakoff concern- 

 ing the effects of radium and radium rays on 

 plants and animals. A preliminary report of 

 the same has already appeared in Science, 

 Vol. 21, pp. 987-988, June, 1905. 

 The Estimation of Minute Quantities of 



Arsenic: H. B. Bishop. 



For the determination of traces of arsenic 

 in sulphuric acid, brimstone, organic matter 

 and most substances soluble in or decomposed 

 by hot concentrated sulphuric acid, the arsenic 

 is separated by distillation with a mixture of 

 sulphurous and hydrochloric acids, and is esti- 

 mated by a modified Marsh test. By this 

 method arsenic-free sulphuric acid has been 

 prepared and .0000001 per cent, arsenic has 

 been added and accurately estimated. The 

 special advantages are that large samples may 

 be taken, few reagents are required and the 

 arsenic is separated from interfering sub- 

 stances without loss, so that the Marsh test 

 can be made under standard conditions. 

 A New Apparatus for the Extraction of Tan- 

 nic Acid: Allen Rogers. 



For the analysis of tea, coffee and tannin, 

 the author has obtained very satisfactory re- 

 sults by the use of an extraction apparatus 

 consisting of two flasks so arranged and con- 

 nected by tubes that thei solution may be 

 drawn repeatedly over the material to be ex- 

 tracted, the temperature being regulated by 

 placing the apparatus on a water-bath or other 

 source of heat. 

 The Synthesis of 6-Brom-quinazolines. M. T. 



BoGERT and W. F. Hand. 



The authors describe the synthesis of 6- 

 brom-quinazolines from 5-brom-2-amino-ben- 

 zoic acid, 5-broin-2-acetaminobenzoic, 5-brom- 

 2-acetarainobenzonitrile, and from 5-brom-2- 



acetanthranil. . The following quinazolines 

 were prepared, with certain of their deriva- 

 tives: 



6-Brom-4-ketodihydroquinazoline, 

 0-Brom-2-methyl-4-ketodihydroquinazoline, 

 6-Brom-2-ethyl-4-ketodihydroquinazoline, 

 6-Brom-2-n-propyl-4-ketodihydroquinazoline, 

 6-Brom-2-i-propyl-4-ketodihydroquinazoline, 

 6-Brom-2-i-butyl-4-ketodihydroquinazoline, 

 6-Brom-2-i-amyl-4-ketodihydroquinazoline, 

 6-Brom-2-methyl-3-phenyl-4-ketodihydroquinazo- 

 line, 



G-Brom-2-3-o-tolyl-4-ketodihydroquinazoline. 



The Constitution of Quinine: B. L. Murray. 

 A review of our knowledge of the molecular 

 constitution of quinine as ascertained from its 

 chemical reactions, so far as we are able to 

 interpret them to-day. Quinine is so readily 

 decomposed into two different classes of bodies, 

 that its molecule is regarded as consisting of 

 two separate halves; the one a metho-oxy- 

 quinoline, the other a hydrogenated pyridine 

 with side chains at beta and gamma. One 

 side chain is unsaturated, while the gamma 

 side chain is connected both to the nitrogen of 

 its own nucleus, and to the gamma carbon of 

 the quinoline nucleus, thus serving to join 

 the two half molecules. The hydroxyl of 

 quinine is located in this connecting chain, 

 and the methoxy group is found in para- 

 position on the quinoline nucleus. 



F. H. POUGH, 



Secretary. 



the AMERICAN CHEMICAL SOCIETY. 

 northeastern SECTION. 



The sixty-fourth regular meeting of the sec- 

 tion was held Friday evening, December 22, at 

 Simmons College, with President Parsons in 

 the chair. About forty members were present. 



Professor James A. Norris addressed the 

 section on ' An Investigation of the Elemen- 

 tary Nature of Tellurium,' in which he dis- 

 cussed the position of tellurium in Men- 

 delejeff's classification, and reviewed the work 

 of various chemists on the atomic weight of 

 that element, and described his own work in 

 preparing pure basic tellurium nitrate, and 

 determining the atomic weight of tellurium 

 by converting that nitrate into tellurium di- 



