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Now that cheaper methods of powdering metals have been developed, metallic pigments are more available for use, and the fact that such pigments are of a wholly different character chemically and physically from all others would make systematic tests of such pigments both for wood and iron of great interest; the desirability of such tests is respectfully suggested to those having paint tests in charge. D. DAVIDSON 478 SHERIDAN AYE.
DETROIT,MICH.
SURFACE COMBUSTION Editor of the Journal of Industrial and Engineering Chemistry: The Gas and Oil Combustion Company of New York City, appreciating the tremendous value of the so-called Surface Combustion or Flameless Fires, has succeeded in combining all the inventors and inventions in this field, such as Lucke, Bone, McCourt, Schnabel, Ellis and various other interests. We are in absolute control to-day of all these inventions, past and present, and of any which may be made by these various gentlemen in the future. This action has been taken since we recognize that in order to achieve success in the development of this field, it is advisable to have all the interests represented by the various inventors combined, thereby avoiding friction and litigation, as well as creating cooperation. HUGOLIEBER ANNUAL TABLES O F CONSTANTS: PHYSICAL, CHEMICAL AND TECHNOLOGICAL, VOLUME I1 The second volume of the Annual Tables of Constants, Physical, Chemical and Technological, published by the International Commission appointed by the VIIth International Congress of Applied Chemistry, will be sold, to subscribers a t $6.00 (unbound), provided the subscription is sent in before Jan. 31,1913.
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Jan., r 9 r 3
Members of the American Chemical Society are entitled to a 20 per cent. reduction (making a net price of $4.80 for the unbound edition), provided the subscription is sent in before Jan. 31,1913. Subscriptions should be sent either to the University of Chicago Press, Chicago, Ill., or to Dr. Charles Marie, Secretary, g Rue de Bagneux, Paris, France.
THE DETERMINATION O F CHROMIUM AND VANADIUM I N STEEL-A CORRECTION I n my article under the above title, THISJOURNAL, 4, j 8 9 , the titration of the vanadium in the excess of permanganate must be done with sodium arsenite, not with ferrous sulfate. Ferrous sulfate reduces the vanadic acid simultaneously with the permanganate and gives an indefinite end point. D. J. DEMOREST
A N E W FORM OF ORSAT APPARATUS-A NOTE Editor of the Journal o j Industrzal and Engineering Chemistry: I note in THIS JOURNAL, 4, 898, in the article under the above title, that Mr. I,. M. Dennis calls attention to an absorption pipette, making up part of the apparatus adopted by the Chemists’ Committee of the Steel Corporation for the analysis of gases, and states that while copyrighted i t is quite similar to the form proposed by Hankus twelve years earlier. The Babb Modification of the Orsat Apparatus, containing this form of pipette, has been advertised and sold by Messrs. Eimer & Amend for quite a number of years, and in this region has always been considered the creation of Mr. J. H. Babb; so common is this knowledge that we did not deem it necessary to make this simple acknowledgment in our pamphlet. In adopting and making this excellent device a part of the apparatus we use, i t it was without any pretense or purpose of claiming originality. J. M. CAMP
BOOK REVIEWS
Transactions of the American Institute of Chemical Engineers. Volume IV (1911). Office of the Secretary, Polytechnic Institute, Brooklyn, New York. Published by the Institute through D. Van Nostrand Company, New York, 1912. ~ v o . , iv 514pages. This fourth volume presents, as a frontispiece, a n excellent brown tone photogravure of the Institute’s President, Leo H. Baekeland. The volume is larger than any of its predecessors and indicates the conservative but steady growth of this infant among chemical societies. The binding is the garnet buckram familiar among Van Nostrand publications. I t is safe to predict, however, that the binding is not well enough done for such a heavy volume and that it will, therefore, not stand much usage. The contents of the volume are divided into two main divisions: Institute Proceedings and Reports (pp. 1-86) and Addresses and Papers read before the Institute (pp. 87-jog). The editor of the volume, Dr. Tohn C. Olsen, who is also the Secretary of the Institute, is to be congratulated upon the successful production of a well arranged and pleasing volume and especially one with so few errors as appear from a rapid perusal of the volume. I t might not be out of place to suggest, however, that a different arrangement of the table of contents would a t least save some from making the error of thinking all of the table of contents is on page iii. Among the miscellaneous material in the f i s t eighty-six pages is a n account of the 3rd semi-annual meeting (Chicago), the two most notable features of which were the series of visits to factories and the first award of the Institute medal to Mr. F. J. Wood, of Marx and Rawolle, Brooklyn, New York, for his
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work on multiple effect distillation of glycerine. The series of factory visits a t this meeting were easily the finest series of such visits it has ever been the pleasure of the writer to attend. There is also an account of the fourth Annual Meeting (Washington, D. C.), the most important feature of which was the Symposium on the United States Patent System. This division of the volume contains also a copy of the Institute’s Constitution and a list of the membership. The main body of the volume contains the following addresses and papers read before the Institute: Some Problems in Chemical Engineering Practice. Extraction of Bismuth from Carbonaceous Ores. Classen Lignum Company. Plant of the Kentucky Soda Ash Company. Introduction t o Washington Address. Manufacture of Chloroform from Bleaching Powder and Ethyl Alcohol. Construction of Laboratory Apparatus. Manufacture and Testing of Shipping Cylinders for Anhydrous Ammonia, F.W.Frerichs. Manufacture and Testing of Carbonic Acid Cylinders, John C. Minor, Jr. Report of the Committee on Chemical Engineering Education. Samuel P. Sadtler. Circular Letter No. 2 , Committee on Chemical Engineering Education. The Four-Year Course in Chemical Engineering. Jos. H. James. The Question of Five-Year Engineering Courses a t Ohio State University, Jas. R. Withrow. A Course in Chemical Engineering Education, J . C. Olsen. Industrial Chemical Calculations, Jos. W. Richards. The Practical Value of Determination of British Thermal Units on Anthracite Coal, S. F. Peckham. Two Methods of Testing Asphalt, S. F. Peckham. Explosives Used in Engineering and Mining Operations, Clarence Hall. Problems in the Manufacture of C. P. Acids, J. T.Baker.
