CORRESPONDENCE. DETERMINATION OF MANGANESE IN STEEL. To the Editor of the Chemical News. SIR, Relative to the letter and paragraph in the CHEMICAL NEWS (vol. cxvii., p. 180) by Mr. Thomlinson on the determination of manganese in steel, I have carried out these determinations by the gravimetric and (bismuth ate) volumetric methods of determination on the same sample. The results agreed within the limits of error. It has been my experience that in the asbestos used only Fe and organic matter which may be present will materially affect the volumetric method referred to, and precautions are usually taken to eliminate these from the asbestos used. These are chemical reactions, and I very much doubt that catalytic agents interfere materially with the procedure of the method referred to in your correspondent's letter, or even the likelihood of their presence in asbestos.-I am, &c., JOSEPH SHIBKO. CHEMICAL NOTICES FROM FOREIGN NOTE. All degrees of temperature are Centigrade unless otherwise expressed. energy could be produced at the rate of one-fiftieth of a penny per unit. The chief electrical engineer to the New Zealand Post and Telegraph Department doubts whether there is a more favoured spot in the world than Bowen Falls, and considers that nowhere in Germany, Norway, and Italy can electricity be generated more cheaply. South African Journal of Science, xiv., No. 6. Literary Notes.-Messrs. Constable and Company will publish almost immediately a new edition, re-written and enlarged, of "Industrial Electrical Measuring Instruments," by Kenelm Edgcumbe, a book which has been out of print for some little time. Among the sections enlarged in this new edition are those dealing with constructional details, power management, induction instruments, current and pressure transformers, and graphic instruments. The new edition contains no fewer than 260 illustrations and diagrams. Messrs. Constable will also publish almost at once "The Production and Treatment of Vegetable Oils," by T. W. Chalmers, in their "Engineer Series." This work, which is fully illustrated, is one which should be in the hands of all those who are interested in this ncreasingly important subject. To comply with Regulation 8 (b) of the Defence of the Realm Act, advertisements from firms whose business consists wholly or mainly in Engineering, Shipbuilding, or the production of Munitions of War, or of substances required for the production thereof. must include the words "No person resident more than ten miles away or already engaged on Government work will be engaged." Ch hemical Laboratory Assistants (Lady) are required at a Gunpowder Factory. Applicants must have had a good education, including training in Elementary Science.-Address, Superintendent," care of James Willing, Ltd., 125, Strand, London, W.C. 2. Comptes Rendus Hebdomadaires des Séances de l'Académie amine CH3.CHOH. NH2. The authors have found that RC=q+NH3>RCH =NH→> RCN+H,. Thus, isoamyl nitrile can be obtained from isoamyl aldehyde. The same reaction can be applied to the aromatic aldehydes. MISCELLANEOUS Potash from Kelp in America. It is stated that kelp is now being harvested by one concern near San Diego in California in quantity sufficient to supply three times the amount of potash annually imported from Germany before the war. A second plant of equal capacity has been established in the same vicinity, and a smaller plant has also been installed by the Government. Every working day 1500 tons of cut kelp are conveyed by ship to a crushing mill. A sticky gelatinous mass results, containing about 80 per cent of water, and can be pumped through a Chemical production, for shift work in controlled factory. One used to Analysis. Ineligible, discharged soldier preferred. Permanency. State full particulars and salary required Address, S. M., London, E.C. 4. CHEMICAL NEWS Office, 16, Newcastle Street, Farringdon Street, Lady Assistant Chemist (wanted in. Rugby Or district) who has passed either Inter. B.Sc., full B Sc., or Inter. A.I C. Examination; Organic and Inorganic Analytical Work. ganic includes large variety of Insulating and Electrical Engineering materials. Opportunity for progressive experience. Several Lady Chemists employed. No person already on Government work will be engaged.-Apply, glving training, copies of testimonials, to your nearest Employment Exchange, quoting No. A 5221. Metallurgical Chemist for Controlled Works on North-East Coast, with sound knowledge of the Analysis of Copper Alloys. Must have had experience with quick Electrolytic Methods of Analysis. The vacancy offers excellent postwar prospects to a really live man who is not afraid of work." No applicant will be considered under twenty-four years of age.-Write, giving full particulars of experience, stating age and salary required, to the pearest Employment Exchange, mentioning the CHIMICAL NEWS and No. A 5151. No one at present on Government work need apply. Works Analytical Chemist required. One conversant with Soap Manufacture, Nicotine Extractions, and Agricultural and Horticultural Preparations. State full particulars and salary required.-Address, W. A, CHEMICAL NEWS Office, 16, Newcastle Street, Farringdon Street, London, E.C. 4. 6-inch pipe to barges, and thence to digestive tanks of WOMEN CHEMISTS, with University 50,000 capacity each. Fixation of Atmospheric Nitrogen in New Zealand. -The Journal of the Royal Society of Arts (lxv., 783) states that at the instance of the National Efficiency Board, New WORK at salary of £175 per annum, in Government Department in training or its equivalent, required for ANALYTICAL South of England. Previous experience in Technical Analysis not necessary. Annual and sick leave allowed. Other women chemists employed. Salary to be increased to 200 per annum at end of six months if services found to be satisfactory. - Address, C. W CHEMICAL NEWS Office, 16, Newcastle Street, Farringdon Street, London, E.C.4. Zealand Government, a project for preparing nitrates from Wanted for the Laboratory of large Chemical the air by the agency of some of the large falls in the south-western sounds of New Zealand is under consideration. One of the simplest propositions is the utilisation of the Bowen Falls, from which it is estimated Factory engaged on War work, well-trained and experienced Analysts. Accurate and systematic workers required. Vacancies exist for both Senior and Junior positions, male and female.-Address, "S. 11," CHEMICAL News Office, 16, Newcastle Street, Far ringdon Street, London, C. 4. May 24, 1918 F. E. BECKER & Co.'s NEW SHORT BEAM ANALYTICAL BALANCE, Agate knife edges and planes throughout; richly gilt beam graduated along W E have FOR SALE a limited number of the EARLIER VOLUMES and NUMBERS of the CHEMICAL NEWS, and are prepared to supply orders at the following rates (Carriage extra): A discount is allowed off the above prices (except where offered at published price) when a substantial number of volumes or numbers are purchased in one transaction. The following volumes can only be supplied bound, as some of the numbers are out of print:-- Vol. 1, 2, 5, 6, 7, 9, 11, 12, 13, 14, 15, 16, 18, 19, 21, 25, 27, 28, 29, 30, 31, 33, 75, 86. All the other volumes can be supplied complete, either bound or unbound. A few bound Complete Sets, from Vol. 1 to date, can be purchased at published price. We still have in stock a few copies of the GENERAL INDEX to Vols. 1 to 100, which can be purchased at £1. 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