August 7, 1908] 



SCIENCE 



191 



from a burette are mixed with. 10-20 times the 

 volume of concentrated hydrochloric acid in a 

 glass-stoppered bottle. Standard 0.2 normal po- 

 tassium bromate solution is run in slowly until 

 a persistent pale yellow color remains, the solu- 

 tion then warmed and shaken xmtil the color dis- 

 appears, more bromate then added, and the color 

 discharged by further heating and shaking; this 

 alternate adding of bromate and heating con- 

 tinued until the temperature has reached 80-90° 

 and the pale yellow color produced by two to 

 three drops of the bromate remains at least fif- 

 teen minutes. Four atoms of bromine per one 

 molecule of salicylic acid are used. The reaction 

 is slow and patience is required, but with care 

 satisfactory results may be obtained. 



Abstracts of the following papers have not 

 been received: 

 On Certain Derivatives of Tetrachlororthoqui- 



none: C. Lobinq Jackson and H. A. Fmnt. 

 On the Reactions of Tautomeric Acids and their 



Salts with Diazoalkyliden and with Alkyl 



Balides: S. F. Acbee. 

 On Furoyl Acetic Ester and its Pyraaotone De- 

 rivatives: Heney a. Tobeey and J. E. Zanetti. 

 On Rosocyanine: C. Lokeng Jackson and Latham 



Claeke. 

 The Nitration of p-Tolylglutaric Acid: S. Aveet. 

 The Action of Phosphorus Trichloride on Organic 



Acids: Wm. McPheeson and Howaed J. Lucas. 

 Comparison of Isomeric — N:C(OR) and NR:CO 



■ — Compounds in the Quinasoline Group: M. 



T. BoGEET and C. E. May. 

 4, 6-Diamino Isophthalic Acid and Some of its 



Derivatives: M. T. Bogeet and Alteed H. 



Keopff. 

 S-Amino Phthalic Acid amd Some of its Deriva- 

 tives: M. T. Bogeet and P. L. Jouaed. 

 The Colored Salts of Schiff's Bases: F. J. Mooee. 

 The Oxidation and the Reduction of i-g-Diphenyl- 



g-Cyanhutyric Acid: S. Aveet. 

 An Insoluble Congo Red; a White Derivative of 



Congo Red: Ieving W. Fay. 

 On an Ooeidation Product of Tetrahromorthoqui- 



none: C. Losing Jackson and H. A. Flint. 



INDUSTRIAL CHEMISTRY 



W. D. RiCHAEDSON, Chairman 



The Cleaning of Blast Furnace Gas: G. D. 

 Ghambeelain. 

 A review of methods of cleaning and present 



tendencies and practise. The cleaning divided 

 into two phases. ( 1 ) A preliminary scrubbing 

 either dry or wet, or a combination of the two, 

 for fuel purposes — hot blast stoves and boilers. 

 (2) Fine washing for gas-engine use. The raw 

 gas carrying from 1 to 5 grams of dust per cubic 

 foot is cleaned down to .1 to .5 for fuel and to 

 .005 gram per cubic foot or less in fine gas for 

 engine use. The magnitude of the problem is 

 suggested in the fact that approximately six tons 

 of gas are incidentally produced for each ton of 

 pig-iron made. 

 Determination of Nickel and Chromium in Steel: 



E. D. Cambell. 



The object of this research was to modify the 

 cyanide-iodide method for the determination of 

 nickel, in such a way that a satisfactory titra- 

 tion could be made in the presence of iron. 

 The titration of nickel with potassium cyanide, 

 using silver iodide as indicator, was proposed by 

 the author in 1895, but in the original method the 

 nickel was separated from the iron before titrat- 

 ing. In the new method the iron is kept in solu- 

 tion as double pyrophosphate by means of sodium 

 pyrophosphate, copper when present is avoided by 

 dissolving in dilute sulphuric acid. Chromium is 

 determined in the same sample as that used for 

 the nickel by a slight modification of the Gal- 

 braith method. 



Application of Ericsson's Lead Method to the 

 Analysis of Spelter, Zinc and Lead Ores: Eeio 

 John Eeicsson. 



The method was described in the September 

 issue, 1904, of the Journal of the American 

 Chemical Society. The lead is brought into solu- 

 tion as nitrate, ammonia and ammonium persul- 

 phate added in excess and boiled. The resulting 

 lead peroxide is filtered off, washed. Filter with 

 precipitate are thrown back into beaker in which 

 precipitation was made, excess of acidulated 

 hydrogen peroxide added and stirred until the 

 lead peroxide is dissolved, the excess of hydrogen 

 peroxide is measured by standard potassium per- 

 manganate of such strength that each tenth of a 

 cubic centimeter ^0.01 per cent, lead when 1.92 

 grams are taken as in low-grade ores and the 

 determination of lead in zinc ores. In the case of 

 spelter 19.2 gram sample are taken when each 

 tenth of the potassium permanganate solution 

 ^0.001 per cent. lead. It is believed the new 

 method will fill a long-felt want, since we have 

 not heretofore had a reliable method for low- 

 grade ores. It will be found on investigation to 

 be a marvel of accuracy. 



