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To meet the needs of today's rapidly changing technological society, firms need increasingly to employ new staff with the requisite skills. Such a transfer of knowledge between organisations can prove complex and stressful for both individual and company.

Since the first Volume of this Bibliography there has been an explosion of literature in all the main areas of business. The researcher and librarian have to be able to uncover specific articles devoted to certain topics. This Bibliography is designed to help. Volume III, in addition to the annotated list of articles as the two previous volumes, contains further features to help the reader. Each entry within has been indexed according to the Fifth Edition of the SCIMP/SCAMP Thesaurus and thus provides a full subject index to facilitate rapid information retrieval. Each article has its own unique number and this is used in both the subject and author index. The first Volume of the Bibliography covered seven journals published by MCB University Press. This Volume now indexes 25 journals, indicating the greater depth, coverage and expansion of the subject areas concerned.

An Autodesk Ember three-dimensional (3D) printer was used to print optical components from Clear PR48 photocurable resin. The cured PR48 was characterized by the per cent of light transmitted and the index of refraction, which was measured with a prism spectrometer. Lenses and diffraction gratings were also printed and characterized. The focal length of the printed lenses agreed with predictions based on the thin lens equation. The periodicity and effective slit width of the printed gratings were determined from both optical micrographs and fits to the Fraunhofer diffraction equation. This study aims to demonstrate the advantages offered by a layer-by-layer DLP printing process for the manufacture of optical components for use in the visible region of the electromagnetic spectrum.

A 3D printer was used to print both lenses and diffraction gratings from Standard Clear PR48 photocurable resin. The manufacturing process of the lenses and the diffraction gratings differ mainly in the printing angle with respect to the printer x-y-axes. The transmission diffraction gratings studied here were manufactured with nominal periodicities of 10, 25 and 50 µm. The aim of this study was to optically determine the effective values for the distance between slits, d, and the effective width of the slits, w, and to compare these values with the printed layer thickness.

The normalized diffraction patterns measured in this experiment for the printed gratings with layer thickness of 10, 25 and 50 µm are shown by the solid dots in Figures 8(a)-(c). Also shown as a red solid line are the fits to the experimental diffraction data. The effective values of d and w obtained from fitting the data are compared to the nominal layer thickness of the printed gratings. The effective distance between slits required to fit the diffraction patterns are well approximated by the printed layer thickness to within 14, 4 and 16 per cent for gratings with a nominal 10, 25 and 50 µm layer thickness, respectively.

Chromatic aberration is present in all polymer lenses, and the authors have not attempted to characterize it in this study. These materials could be used for achromatic lenses if paired with a crown-type material in an achromatic doublet configuration, because this would correct the chromatic aberration issues. It is worthwhile to compare the per cent transmission in cured PR48 resin (approximately 80 per cent) to the percent transmission found in common optical materials like BK7 (approximately 92 per cent) over the visible region. The authors attribute the lower transmission in PR48 to a combination of surface scattering and increased absorption. At the present time, the authors do not know what fraction of the lower transmission is related to the surface quality resulting from sample polishing.

There are inherent limitations to the 3D manufacturing process that affect the performance of lenses. Approximations to a curved surface in the design software, the printing resolution of the Autodesk Ember printer and the anisotropy due to printing in layers are believed to be the main issues. The performance of the lenses is also affected by internal imperfections in the printed material, in particular the presence of bubbles and the inclusion of debris like dust or fibers suspended in air. In addition, the absorption of wavelengths in the blue/ultraviolet produces an undesirable yellowing in any printed part.

One of the most interesting results from this study was the manufacture of diffraction gratings using 3D printing. An analysis of the diffraction pattern produced by these printed gratings yielded estimates for the slit periodicity and effective slit width. These gratings are unique because the effective slit width fills the entire volume of the printed part. This aspect makes it possible to integrate two or more optical devices in a single printed part. For example, a lens combined with a diffraction grating now becomes possible.

THE usual methods for obtaining data on the hydrodynamic characteristics of flying boats during flight tests involve motion pictures of an instrument panel and records of oscillograph traces. The analysis of the photographic records is so time consuming that the results are not always available when needed, and in many cases more data are accumulated than is physically possible to analyse. In order to conserve manpower and to obtain directly usable data, new methods have been developed for making quantitative hydrodynamic flight tests. The test techniques were devised to relate, whenever possible, numerical values to sensations experienced by the pilot of a flying boat during take‐off and landing.

It has often been said that a great part of the strength of Aslib lies in the fact that it brings together those whose experience has been gained in many widely differing fields but who have a common interest in the means by which information may be collected and disseminated to the greatest advantage. Lists of its members have, therefore, a more than ordinary value since they present, in miniature, a cross‐section of institutions and individuals who share this special interest.

In the last four years, since Volume I of this Bibliography first appeared, there has been an explosion of literature in all the main functional areas of business. This wealth of material poses problems for the researcher in management studies — and, of course, for the librarian: uncovering what has been written in any one area is not an easy task. This volume aims to help the librarian and the researcher overcome some of the immediate problems of identification of material. It is an annotated bibliography of management, drawing on the wide variety of literature produced by MCB University Press. Over the last four years, MCB University Press has produced an extensive range of books and serial publications covering most of the established and many of the developing areas of management. This volume, in conjunction with Volume I, provides a guide to all the material published so far.

THE interval between the Library Association Conference and the printing of THE LIBRARY WORLD is too brief for more than a series of impressions of it. Comment is probably preferable in our pages to mere record. The Association is publishing in the next few weeks all the papers that were read and, as we hope, the substance at least of the unwritten contributions. In this second particular reports in recent years have been lacking. A report that merely states that “Mr. Smith seconded the vote of thanks” is so much waste of paper and interests no one but Mr. Smith. If Mr. Smith, however, said anything we should know what it was he said. What we may say is that the Conference was worthy of the centenary we were celebrating. The attendance, over two thousand, was the largest on record, and there has not been so large a gathering of overseas librarians and educationists since the jubilee meeting of the Library Association at Edinburgh in 1927. So much was this so that the meeting took upon it a certain international aspect, as at least one of the non‐librarian speakers told its members, adding that it was apparently a library league of nations of the friendliest character. It followed that an unusual, but quite agreeable, part of each general session was devoted to speeches of congratulation and good‐will from the foreign delegates. All, with the possible exception of the United States, dwelt upon the debt of their countries in library matters to the English Public Libraries Acts and their consequences. Even Dr. Evans, in a very pleasant speech, showed that he had reached some tentative conclusions about English librarianship.

“A rose would smell as sweet by any other name,” but does the name make any difference to the composition of a member of the sausage family? Apparently, it does. In two recent cases at Hull (see Legal Proceedings, this issue), it was contended that a meat‐burger should contain 80% meat, similar to the recommendation of the Food Standards Committee for canned meat, and it was shown that meat‐burgers in the district had an average meat content complying with this standard—84% in 42 samples. In one case in question, the meat content was 31% and the retailer claimed in defence that when informed by inspectors of the 80% requirement, he decided to call his products just burgers, which left him free to adopt any composition he desired. The comments of the magistrates are not known, except that they considered the case an interesting one and dismissed it!

Extends the “wheel of retailing” hypothesis by developing hypotheses dealing with product behaviour. Evaluates these hypotheses with historical data which have begun to change according to the “wheel of retailing”. Reveals that these hypotheses suggest that retail change is closely linked to environmental factors, including innovation diffusion and product life cycles. Concludes that retail change is therefore also an historical problem and that it is wise to investigate the specific history of retail firms in order for its implementation to be effective.

THE joint publication, by the Institute and Society of County Treasurers, of Public Library Statistics for 1963–4 provides material of considerable topical interest at this time. The Public Libraries and Museums Act 1964 came into force on 1 April 1965 and only a day or so before this date the Department of Education and Science issued Circular 4–1965, which, in addition to giving a general description of the provisions of the Act, includes an appendix drawing attention to the report of the Ministry of Education published in 1962 (“Standards of Public Library Service in England and Wales”) which, the Circular says, “gives guidance on the factors to be taken into account in considering the adequacy of the service”.