Jantjaby 22, 1897.] 



SCIENCE. 



157 



SCIENTIFIC JOURNALS. 



AMERICAN CHEMICAL JOURNAL, JANUARY. 



On Parabromdhnetanitrotoluol and some of its 

 derivatives : By C. L. Jackson and M. H. Itt- 

 NER. This work was undertaken to study the 

 behavior of a bromine atom, in the ortho posi- 

 tion to two nitro groups, but not exposed to a 

 third negative group in the para position. The 

 substances studied were the benzene and tol- 

 uene bromdiuitro compounds. The toluene com- 

 pound was found to be poorly suited for the re- 

 search on account of its stability. Several of 

 its derivatives were made and studied ; but in 

 some cases the methyl group seemed to exert a 

 protective action, preventing the formation of 

 compounds whose analogues in the benzene 

 series were easily formed. The bromdinitro- 

 benzoio acid was found to be more reactive than 

 the toluic acid. A number of related acids and 

 their salts were made, and attempts were made 

 to greatly increase the complexitj' of the mole- 

 cules ; but it was found that the substances lost 

 their tendency to crystallize as the complexity 

 increased, and pure substances could not be ob- 

 tained. 



Aluminum Elhylate : By N. H. Hillyer and 

 O. E. Crookee. In preparing amalgamated 

 aluminum for reduction in neutral solution 

 the authois found that contact with the air 

 was injurious, and they therefore attempted to 

 prepare it in alcohol without allowing it to 

 come in contact with the air. To their surprise, 

 and contrary to the statements of others who 

 had worked on these substances, quite a reac- 

 tion took place between the amalgamated 

 aluminum and absolute alcohol, the final prod- 

 uct being a white solid. This product was 

 distilled, and a mixture of aluminum ethylate 

 and aluminum chloride was obtained. 



On the conditions affecting the Volumetric De- 

 termination of Starch by means of a solution of 

 Iodine : By F. T. Littleton. The author has 

 studied the accuracy of volumetric determina- 

 tions depending upon the starch iodide reaction. 

 She found that not only was the reaction af- 

 fected by the temperature, but that starch from 

 different sources gave different results. She 

 reached the same conclusion that has been 

 reached by others, namely, that the so-called 

 iodide of starch is probably not a definite chem- 



ical compound and that it is very easily dis- 

 sociated. 



Silver Hydride : By E. J. Baetlett and W. 

 F. Rice. The authors succeeded in preparing 

 silver hydride by precipitating a dilute solution 

 of silver nitrate with dilute hypophosphorus 

 acid. The product is filtered off rapidly and 

 washed. It forms black spongy flakes and is 

 not decomposed by water. 



On the Volatility of Ferric Chloride : By H. P. 

 Talbot. Conflicting reports are found as to 

 the volatility of ferric chloride, and the author 

 undertook this investigation to determine the 

 accuracy of these statements. He found that 

 ferric chloride is not volatilized by boiling its 

 solutions, and that no loss ensues on heating 

 the dried residue to 130°. In the presence of 

 aqua regia or when overheated with ammonium 

 chloride there is, however, a slight loss. 



Concerning properties belonging to the Alcohol- 

 soluble Proteid of Wheat and of certain other 

 Cereal Grains : By G. L. Teller. The author 

 found that the method of separation of the 

 gluten and non-gluten compounds in wheat, by 

 means of dilute salt solutions, was inaccurate, 

 on account of the fact that the same nitrogen 

 compounds were soluble both in the dilute salt 

 solutions and in 75 per cent, alcohol. He 

 separated the part precipitated by the salt solu- 

 tion, and then added a solution of phosphotungs- 

 tic acid to the filtrate. By this process he 

 separated the amides from the proteids soluble 

 in salt solution. The part precipitated by the 

 salt solution consisted of edestin and leucosin, 

 and the sum of the nitrogen in these substances 

 and that in the amides subtracted from the 

 total nitrogen gives that in the alcohol-soluble 

 proteid, which is gliadin. 



suicide of Chromium : By G. de Chalmot. 

 This investigation shows that not only does 

 chromium form a silicide of the formula SiCr.^, 

 the compound obtained by Moissan ; but also a 

 compound SijCr, formed by heating chromium 

 sesquioxide, charcoal and silica in an electric 

 arc furnace. 



Paraisobutylphenoxyacetic Acid: By W. P. 

 Bradley^ and F. Kniffen. This acid was pre- 

 pared by the same methods used in the forma- 

 tion of its homologue phenox5'acetic acid. A 

 number of its salts were prepared and studied. 



