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THIS scheme of exact classification has now been long enough upon trial to justify the publication of a few explanatory notes, adjustments, and revisions which may be useful to present and future users of the system. For an entirely new scheme, which to some extent broke fresh ground, its reception has been extremely kind and flattering, and although it has not escaped criticism, nothing has appeared which has been anything but reasonable and helpful. A surprising circumstance has been that, notwithstanding the very controversial nature of much of the subject, so few points of difference have appeared. These are all more or less directed against the mere placing of certain topics and do not to any extent reflect upon the theory or structure of the system as a whole. One mistake has been made, however, of a more important nature, but this must have arisen either through misapprehension or carelessness. It has been assumed that the Subject Classification claims to be thoroughly scientific, and that each class is arranged in a logical and evolutionary order, so as to modulate or merge naturally into its successor. Any modest claim which may have been made to an attempted logical order is invariably qualified by a statement in the “Introduction” to the effect that such perfect order is only to be expected to a very limited extent. On page eight it is stated that—“The departments of human knowledge are so numerous, their intersections so great, their changes so frequent, and their variety so confusing, that it is impossible to show that they proceed from one source or germ, or that they can be arranged so that each enquirer will find the complete literature of his special subject at one fixed place.” All through the tables and the introduction the same kind of limitation is insisted upon, and it can only be due to misunderstanding to say that I have made such a preposterous claim to sequential perfection. No librarian who has attempted to compile a system of exact classification would ever dream of claiming that he did more than get as near as possible to an ideal arrangement in accordance with his basal plan.

When I began as column editor for “Reference Serials” I experienced an immediate need for a cumulative index to titles reviewed in this column over the years. An expeditious solution to the question of whether a particular title had been reviewed previously in RSR was a search of Book Review Index on DIALOG. In the process of this searching, I discovered that BRI's indexing of RSR was more complete than RSR's self indexing and, of course, BRI's indexing online is cumulative while RSR has no cumulative indexes. Both index options had an additional problem: each included references to all the titles mentioned in the various columns of RSR regardless of whether the reference was actually to an extensive review or simply to an unannotated listing of the title.

We have before us the recently‐issued Annual Report of the Local Government Board on the work done by the Local Authorities under the Sale of Food and Drugs Acts. While preserving the general form and arrangement of its predecessors, it shows that not only the Board itself, but the local authorities also, are coming to an increasing realisation of the importance of the subject. Six years ago we had occasion to point out some of the defects attaching to these reports, and to suggest various improvements that might be made in them. We felt, and expressed at the time our belief, that the Board was much handicapped by the form of quarterly reports imposed on the Public Analyst by the Food and Drugs Acts, and by the non‐existence of any machinery by which it could get together and collate the vast amount of information which those reports ought to, but do not, yield. Until the law is altered the present system must continue, but it is striking evidence of the lack of serious study spent on the matter that for want of effective coordination and control more than one‐half of what may be considered the real and permanent value of the Public Analyst's work goes into the waste‐paper basket. The work done by most Public Analysts as individuals is limited to some few hundreds of samples of any one article of food, but the combined expeperience of them all would in most cases — assuming it could be accurately ascertained—go far towards settling in a single year many of the thorny questions relative to standards and limits which are fought out at such great length and still greater cost to the community in the courts of law.

The results of searches on biological, medical and veterinary subjects by both the E.M. automated retrieval system and MEDLARS were compared. Of a total of 60 E.M. searches 23 were selected for the comparative study. Seven were eliminated because these needed specific terms not present in the MEDLARS terminology and 30 were omitted for other reasons. In 17 searches MEDLARS produced more relevant references than E.M. On the other hand in 12 searches the precision of E.M. was higher than that of MEDLARS. An average precision of 55 per cent was found for E.M. and of 38 per cent for MEDLARS. In 12 searches the cause of the failure to retrieve known relevant references was investigated. In MEDLARS 28 per cent was due to inadequate journal coverage and 72 per cent to indexing or searching failures (total 71 failures); in E.M. these percentages were 8 and 92 respectively (total 160 failures), the last percentage including an unknown proportion due to selective indexing of journal contents. Of 226 relevant references from E.M. and 467 relevant references from MEDLARS (the total retrieved in 15 searches), 94 references were duplicated. Recall figures were estimated: an average recall of 18 per cent was found for E.M. and 33 per cent for MEDLARS. Search strategies and indexing of overlapping references were compared. An estimate was made of the extension ratios of 12 searches. This measure averaged 1.9 for E.M. and 2.8 for MEDLARS.

The importance of sanitary conditions in the production, manufacture, and distribution of foods was never greater than to‐day, for less of the food consumed by the individual is produced and prepared at home than ever before; and likewise, the necessity for sanitary laws in regard to foods was never more keenly realised. The disclosures of the insanitary conditions in our packing houses, exaggerated in many instances, has aroused public indignation. The newspapers added fuel to the flame by rehashing every case in recent history containing anything gruesome or revolting in connection with the preparation of food products. These reports, appearing day after day in the newspapers, gave the public the false impression that the manufacture of human bodies into food products was a matter of not uncommon occurrence, and that insanitary conditions prevailed in the manufacture of most foods. The discussion was continued until not only this country, but Europe, looked with suspicion on the food products of the United States.

The Presidential Address to the Liverpool Engineering Society by Mr. Farthing (the salient points of which are reproduced in this issue) has particular bearing upon lubrication and especially on young lubrication engineers. Mr. Farthing stressed the very wide field open to young engineers and the difficulties associated with training in order to cover as wide a field as may be necessary. It is usually so important to gain a wide knowledge before one can specialise and this is certainly the case with lubrication engineers. One cannot begin to fully appreciate the intricacies of a lubrication system with all its accessory components lubricating and guarding, for example, a large motive power plant or rolling mill, until one has more than a mere working knowledge of the plant itself, the duties it must perform, how it performs them and the snags that arise which might be overcome by correct lubrication. In view of the fact that lubrication systems are just as important in a textile mill as in a power station or a large brick works, the almost impossible‐to‐achieve‐range of knowledge that would simplify the work of a lubrication engineer is very obvious. Fortunately, lubricating principles apply to most cases and knowing how to apply one's knowledge from basic principles is the key to success in this difficult profession.

Since the publication of the report of the Lancet Commission on Brandy and the prosecutions that followed, much attention has been given to the subject, and although no great additions to our knowledge of the composition of this spirit have recently been made, practical use is now being made of information which has been at our disposal for five years or more, which has already had far‐reaching effects upon the trade.

It is probably well known to the majority of educated Englishmen that in the United States of America two kinds of Government exist side by side, and are jointly responsible to the people for the conduct of the external and internal relations of the Republic. These two forms of government are represented by the Federal Government and by the several governments of the different States of the Union.