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THE JOURNAL OF INDUSTRIAL A N D ENGINEERING CHEMISTRY
respect. With the aid of the ozonators we were able, last fall, t o preser\e beef for 55 days without any decay in the meat. Any odors t h a t occur are removed within five to ten minutes b y the ozonator. Such odors appear after holidays, as the ozonators are used only a very short time on the holidays proper.
Unfortunately, time does not permit me to exhaust this almost inexhaustible field. You may draw your conclusions from what I said. One thing you must admit and conclude, namely: t h a t the ozone industry is not bringing a new apparatus on the market in a thoughtless way, bent only on its own profits. Rather we have found t h a t the ozone industry, in view of the practical results obtained and the many inquiries, was justified in following up this line of experiments and in carrying on and exploiting, a process which seemed good and useful to industry. The ozone industry, moreover, will be able t o adhere to this viewpoint without fear and doubt. OPERATIONS OF STEEL MILLS IN MARCH During March, the steel mills throughout the country continued to operate a t an average rate of about 75 per cent of capacity, although the rate in the Pittsburgh district was estimated a t about 80 per cent. Pig iron production was a t a rate slightly above 26,000,000 tons a year. New business came in a t a very low rate during the first fortnight of the month; this was attributed t o the weather conditions, but there was disappointment that the lull which naturally followed the January buying movement, and which was more or less expected, had not yielded t o more active market conditions by the middle of the month. The sheet mills are now operating a t a n average of about 85 per cent of capacity, while the tin plate mills are operating substantially full. In wire products and tubular goods the conditions are nearly as good. W. A. HAMOR
A RAPID METHOD FOR CASEIN I N MILK-CORRECTION In THIS JOURNAL, 6, 131, the following paragraph should have been inserted a t the end of the article under the above title: “Since the above work was completed it has been found that beechwood creosote serves as an admirable preservative for milk. When added in the proportion of 5 cc. to I pint of milk, the latter keeps in good condition for several months if placed in the dark. The preservative does not interfere with the casein test, nor with the Babcock fat test, provided only onehalf the usual amount of sulfuric acid is used.” W. 0 . WALKER G O R D O X HALL OR C H E M I S T R Y SCHOOL O F h I l S I K G .
KISGSTON,O X T A R 1 0
Vol. 6 . N o . 4
AMERICAN ALCOHOL INSOLUBLE TEST FOR SHELLACNOTE I n the method we have described for the determination of the alcohol insoluble matter in lac, the following statement occurs: “During the extraction the alcohol is kept boiling briskly. The extraction is stopped one hour after the alcohol in the siphon 5 (1913), 4351. tube has become colorless” [THISJOURNAL, We believe it advisable to further standardize the method a t this point and recommend t h a t the rate and time of extraction be kept under precise control. The rate of extraction may be controlled by the use of an electric stove of the Simplex type, 4l/2 inches in diameter, and using the full current of 2.2 amperes a t I I O volts. The volume of methyl alcohol in the flask should be 125 cc. This is in addition to the alcohol required to fill the siphon. The flask should be protected from draughts. Under these conditions the tube will siphon over about 33 times an hour. The condenser should be able to return all the alcohol volatilized during the vigorous boiling of the flask contents, the object being to effect the maximum extraction during the fixed time. The color is removed by the end of the first hour in practically every case and in order to eliminate any variations due to differences of opinion as t o the exact time when the color has disappeared we recommend that the total extraction period be limited t o exactly two hours, time being taken from the moment when the first siphon tube of alcohol has passed over. The methyl alcohol used in this method should be 99.5 per cent, by volume.
Signed: C. T. BRAGG,Cheirman, Director of Laboratories, Berry Bros., Detroit. GEORGEE. ASHBY,of John R. Anderson & Co., N’ew York. A. C. LANGMUIR, Works Manager, Marx & Rawolle, New York. PARKER C. MCILHINEY,Consulting Chemist, New York. UT.PAISLEY,Chemist, Rogers & Pyatt, h’ew York.
JOHN
Approved: H. S. CHATFIELD, Secretary, United States Shellac Importers’ Association.
PERSONAL NOTES The Russian minister of public instruction has made a grant of $50,000 to the St. Petersburg Academy of Sciences to assist a search for radio-active minerals throughout the Russian Empire. Dr. A I . G. Donk, of the Bureau of Chemistry, has be,en detailed by the Department of Agriculture to cooperate with the Department of Forestry a t the Univ. of Idaho in investigations looking to better methods of utilizing mill waste and refining by-products obtained from stumps. The work will be a continuation and extension of experiments carried on for the past three years by Dr. C. H. Shattuck, head of the Department of Forestry a t Moscow. A Better Industrial Relation Exhibit will be held April 18-25th, a t z West 64th Street, New York City. It will show the devices in modern business which tend to make more harmonious the relations between employer and employee, and t o better the conditions of employment. The Business Men’s Group of the Society for Ethical Culture has charge of the Exhibit, which will appeal to both employer and employee in the manufacturing trades. There will be special evening lectures by industrial leaders of the country.
The American Electrochemical Society will hold its Spring Sleeting in New York City, April 16-18th. The program consists of a Symposium on “Power for Electrochemical Purposes” and papers on “Hydro-electrometallurgical Process.” The American Electro-Platers’ Society will take part in the discussion of the papers on the latter subject. The Franklin Institute of the State of Pennsylvania has awarded its Elliott Cresson Gold Medal to Prof. Wolfgang Gaede for his molecular air pump, in consideration of the very great value of this invention for the quick production of vacua beyond those hitherto obtainable. The Board of Regents of the Vniversity of Wisconsin has created a n Engineering Experiment Station to be established in the College of Engineering and to have general charge of the testing and research work of the college. The staff will consist of the Dean as Director, the members of the instructional staff in the various departments of the College of Engineering and those fellows, scholars and assistants engaged in experimental and research work. This action transfers the appropriation for research now made for the College of Engineering t o the En-
