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This work sets out to characterise the protective properties of conformal coatings and how they degrade.

The approach dosed several commercial coatings with two different contaminants, a synthetic generic flux mixture of dibasic acids in both a solvent‐ and water‐based carrier, and sodium chloride. The protective properties were monitored using three complementary techniques: surface insulation resistance measurements, sequential electrochemical reduction analysis, and diffusion measurements.

The experimental approach was verified and the SIR measurements were shown to be the most valuable. Coatings offered varying levels of resistance to the contaminants, with the silicone coating being the most resistant. The flux variants generally proved more harmful to the coatings, suggesting that flux diffusion through the coating exceeded that of NaCl and hence led to greater electrochemical corrosion. Flux transmission through the coatings was verified by the diffusion measurements.

The project only investigated a limited number of contaminates on simple single sided boards. Future work will investigate coverage effects and a wider range of contaminants.

The work shows that coatings can allow diffusion of contaminates, particularly organics, which can lead to corrosion. The test methodology described here can be used to characterise coating susceptibility.

This work starts to develop for the first time a test methodology to characterise the protective properties of conformal coatings, and shows that flux, and hence other similar organic contaminants, may represent a protection challenge for some coating chemistries.

MID‐SEPTEMBER, with the summer gone irrevocably, allows the librarian a fortnight of reflection time before the strenuous interests of autumn and winter become active. That is, if he returns stimulated in body and mind from a reasonable holiday and does not become immersed immediately in the almost compelling series of meetings of librarians arranged for the last fortnight of September and for October. For the student members the Birmingham Summer School remains in session until the 20th; for their elders ASLIB will confer at Swanwick from the 19th to 21st, and, in the same week‐end at Buxton, there will be the conference on library work for children; and, a week later, 26th to 29th, the University and Research Section will occupy Lady Margaret Hall at Oxford. The arrangements for October are set out in the L. A. Record. Their profusion embarasses many librarians. It is only natural that, as librarianship extends, every organized part of it becomes keenly aware of its individuality and, as the profession today grows more and more conference‐minded, few can keep step, save in a general way, with more than a fraction of the meetings arranged. Some effort is made by the L.A. and by librarians to preserve and strengthen the basic unity of all librarianship, but otherwise the diversity is great.

Aarhus Kommunes Biblioteker (Teknisk Bibliotek), Ingerslevs Plads 7, Aarhus, Denmark. Representative: V. NEDERGAARD PEDERSEN (Librarian).

At the invitation of Miss Olga Nethersole, founder and honorary organiser of the People's League of Health, a number of medical and science councillors and official members of the League met at luncheon at Claridge's Hotel, London, on October 18th, to welcome the members of the newly appointed Veterinary Council. The speeches which followed dealt with the campaign of the League for a safe milk supply, and the part which veterinary science, in conjunction with the other interested professions, might play in attaining the desired end.—Prof. T. J. Mackie, D.P.H., of the Department of Bacteriology, Edinburgh University, said that the formation of the new Veterinary Council was a significant event in the history of the League. It emphasised the absolute necessity of enlisting the co‐operation of the veterinary profession in the campaign for human health. If we were to guard our own health we must pay due respect to the health of our domestic animals, and particularly those from which we received our essential foods, such as milk. It was common knowledge to both the medical and the veterinary profession that our milk supplies, collectively speaking, were not safe, and that, in fact, they might carry a constant menace to the public health. Milk‐borne tuberculosis dominated the whole question of our milk supplies. It must be remembered, however, that tuberculosis was only one of the milk‐borne infections. There were others such as diphtheria, enteric fever, scarlet fever, and undulant fever. Yet there was distinct apathy, and sometimes antipathy, to the simple measures that would regulate this state of affairs. The League were to be congratulated on having performed a valuable public service in their critical survey of the question of bovine tuberculosis, and bringing out in fair relief the essential facts in regard to tuberculosis of animal origin in human beings. Some of the facts in the report could not be too often and strongly repeated. In England and Wales, for instance, it had been shown that every year the bovine type of tuberculosis bacillus caused at least 4,000 new cases of human tuberculosis and at least 2,000 deaths. And seven per cent. of the ordinary samples of vended milk contained this organism. He could speak feelingly, for in Scotland they had rather more than their share of tuberculosis of the bovine type in the human subject. When one reflected on all that had been done in various ways for the improvement of public health, it seemed almost incredible that food was being sold daily with a seven per cent. and sometimes a 14 per cent. chance of it containing a germ capable of producing a crippling or even fatal disease without any warning to the public. If tuberculosis were not an insidious disease, but an explosive epidemic, even if its incidence were not so high, these conditions would not have been tolerated so long as they had been. The veterinary profession recommended the eradication of disease from herds as the fundamental remedy. It was the fundamental remedy, but even the highest grade tubercle‐free milk might carry a very dangerous infection, and, in any case, he did not think the objects which the veterinary profession had at heart, and with which he sympathised, and compulsory or universal pasteurisation on the other hand, were mutually exclusive. He did not see that pasteurisation would set back the clock of progress against the eradication of tuberculosis in the herds. The problem was an urgent one. The eradication of the disease from dairy cattle must proceed slowly and against difficult obstacles, and they could not wait. It was estimated that, if the eradication of tuberculosis were continued at the present rate in this country, it would be 400 years before we reached the stage that had been reached in America. Even if it were expedited, it must remain a relatively slow process. He could not understand those individuals who were content to tolerate the continuance of bovine tuberculosis in the human being in the hope that some day a raw tubercle‐free milk might be universal. Our agricultural and public health organisations were doing the people an injustice in their tacit sanction of the ordinary raw market milk. If they were not prepared to countenance compulsory pasteurisation, at least in the large communities, the only alternative was an official designation of that milk, which would make it clear to the public that it was not free from potential danger. He sometimes wondered what would be the effect of such an official designation if there were displayed in the retail milk shops an official notice stating to the public that such milk was not free from diseases dangerous to human subjects, and that they were warned not to use it without previous sterilisation. He was sure that if that were done the problem would very soon solve itself. Some Local Authorities were pressing hard for powers of compulsory pasteurisation. He thought the League might very well carry on the campaign by educating public opinion and influencing Parliament to that end. If the Government Departments were not willing to move in the matter and take action, then the public must be informed in the clearest possible terms what the position was. The League, in tackling the milk problem by its own methods, had a magnificent opportunity of making a great contribution to the important cause for which it stood.—Professor J. Basil Buxton, of the Institute of Animal Pathology at Cambridge University, said that pasteurisation could not by any means dispense with the necessity for clean milk. They must produce clean milk, however much or however little they might cook it or otherwise treat it afterwards.—Professor Gaiger, President of the Royal College of Veterinary Surgeons, said that they had an enormous job in front of them if they were going to make our milk free from the germ of bovine tuberculosis.—Sir Leonard Hill said that if we could get the people on the right diet we should enormously diminish the amount of disease. Of all the foods milk was one of the most important, and we ought to make the supply safe. Pasteurisation should be made compulsory at once.—Major D. S. Rabagliati, Chief Veterinary Inspector to the County Council of the West Riding of Yorkshire, told the gathering of the important work carried out by his Local Authority, who were the pioneers in the veterinary inspection of cows. He maintained that even if there were compulsory pasteurisation that was no reason why they should not have a clean supply of milk.

Middle level teachers, at times, link historical content with relevant English literature in interdisciplinary units. Elementary teachers periodically employ history-themed literature during reading time. Interconnections between language arts and history are formed with developmentally appropriate literature for students. Historical misrepresentations, however, proliferate in children’s literature and are concealed behind engaging narratives. Since literacy and historical thinking are essential skills, children’s literature should be balanced within, not banished from, the classroom. Using America’s peculiar institution of slavery as a reference point, this article examines children’s literature, identifies almost a dozen areas of historical misrepresentation, and proffers rich primary source material to balance the various misrepresentations. We provide teachers with reason for caution when including such literature; but also model how to locate, use, and, at times, abridge primary source material within an elementary or middle level classroom. Such curricular supplements provide balance to engaging but historically-blemished children’s literature and enable educators to attain the rigorous prescriptions of Common Core.

Many individuals experience a sense of déjà vu when smelling a particular scent in the air or on hearing a name or words from the past. At times even the faintest scent or sound may evoke old memories and stir the senses. This is particularly true when the names of long‐ago television and radio programs are heard. Depending on one's age and the part of the country in which one lived, people born before the “baby boom” years (1946–1964) often feel a profound sense of nostalgia about such radio programs as Mr. District Attorney and Fibber McGee and Molly or the television shows Howdy Doody and Toast of the Town/Ed Sullivan Show. These early programs are considered part of the “golden age” of radio and television broadcasting.