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IT is probably true to say that the opinion most widely held about aircraft accessory power systems is that they are a necessary evil about which nothing very much can be done. This attitude is induced in practice by the following facts: (i) most aircraft will not operate satisfactorily without an accessory power system; (ii) the accessory power system is normally only re‐sponsible for a very small proportion of the major failures of the aircraft and is, in any case, only an accessory and not fundamental to the design of the machine; (iii) more maintenance hours are spent putting the accessory power system right than on almost anything else.

IN addition to the completely separated air which may be trapped in a hydraulic system, air may also exist in close association with the fluid in either of two states, namely:

The report of the Chief Veterinary Officer of the Ministry of Agriculture and Fisheries which records the proceedings taken under the Diseases of Animals Act for the year 1929 has just been issued. It indicates clearly the enormous amount and complexity of the work which devolves on the officers of the Ministry. They may very well say with John Wesley, “ All the world is my parish.” For instance in seven outbreaks of anthrax “ which …. occurred a few years ago,” the cause was found to be infected bone meal used as a manure and imported from an Eastern country (p. 43); another outbreak was traced to beans that had been imported from China (p. 44); again, special measures have been taken, at the instance of His Majesty's Government, by the Governments of Uruguay, Brazil, and Argentine to prevent the introduction of foot‐and‐mouth disease into this country by chilled or frozen meat (p. 46); an outbreak of foot‐and‐mouth disease at Los Angeles, California, led to an embargo being placed on the importation of hay and straw from that State (p. 52); while an outbreak in Southern Sweden led to similar steps being taken (p. 52). It is unnecessary to give further instances, but it is evident that the complexities of modern commerce and the development of rapid means of transport imposes world‐wide duties on the Ministry of a nature that were by no means contemplated when in 1865 the Veterinary Department of the Privy Council—of which the present Ministry is a lineal descendant—was instituted as a result of the outbreak of cattle plague which had ravaged the country. Table I. (p. 94) gives the total number of cattle in Great Britain for the five years 1925–1929 inclusive, each year ending in June. The percentage variation in the number of cattle during that time appears to be four per cent., so that the Ministry is responsible under the Act for about 7¼ millions of cattle, the 1929 return gives 7,190,539. The census and the subsequent co‐ordination of the returns made is in itself a task of no inconsiderable magnitude. In addition to this, however, veterinary skill of a high order is demanded, not only in the interests of a trade whose dimensions are indicated by the figures just given, but in the interests of public health in relation to notifiable cases, under the Act, of bovine tuberculosis. The number of cows and heifers in milk or in calf is given as 3,166,292 or 44 per cent. of the total number of bovine animals. It is of course from these that we derive our supplies of fresh milk, so that on their health our own health to a certain extent depends, and to a greater extent the health of invalids and children to whom milk is a prime necessity. It is therefore scarcely possible to over‐rate the weight of responsibility resting on the Ministry when the relation of its duties to the incidence of bovine tuberculosis is considered. Two important facts, however, demand attention. The first is that the Tuberculosis Order of 1925 was, as the Report points out, neither designed nor expected to eradicate bovine tuberculosis. The disease is widespread, and it is to be feared somewhat firmly established in our herds—an evil legacy from the past. The most that can be done at present is by means of the Order to remove as far as possible the danger to human health from the ingestion of the milk of infected animals and to reduce the number of these animals. Any attempt which might be made to completely eradicate the disease would in our present state of knowledge lead to a serious depletion of our herds throughout the country, and large expenditure in compensation (p. 23). In the second place while the Order of 1925 requires certain forms of the disease to be reported, no steps are at present taken or can be taken to search out the disease. An organisation designed so to do would be costly, as it would in the first place involve “ a considerable extension of periodical veterinary inspection of all dairy cows, coupled with the application of the biological test ” (p. 23). Hence leaving out of consideration our deficient knowledge of the disease, though its effects are horribly evident in our national life, the old conflict of public health versus public pocket is presented to us in an acute form.

The Great Recession has strained governments at all levels and presented cities, especially formerly industrial cities, with nearlyunprecedented budgetary challenges. This paper examines the long-termimplications for infrastructure maintenance and service provision ofunfavorable economic and demographic trends in Philadelphia andBaltimore. The concept of the public equity holder, which borrows a term forpublic finance from corporate finance, introduces a category of potentialcontributors to the capital deficit undermining urban sustainability. Theconcept is illustrated by a case study of the two cities to explore howcandidate public equity holders, including taxpayers, nonprofits, and publicemployees, may contribute. Resulting from this research are identifiablefactors, particularly patience and risk tolerance, which have led to orimpeded partnerships promoting urban sustainability and will provide thefoundation for broader future study

Mapping the intrinsic value of the art of architecture and the art of nature within the context of Kakunodate and the preservation of its samurai manors and Sakura heritage trees, this paper proposes that from the perception of tourists, the preservation of both items is important. Extending the psychology of pricing that is subject to consumers’ preference and expectation to the context of valuation of cultural heritage assets, the purpose of this paper is to suggest that including the art of nature and the aesthetic of Sakura to the art of architecture (Samurai manors) will add more value to the cultural heritage of Kakunodate than when only the art of architecture is mentioned.

This paper uses Contingency Valuation Method to solicit tourists willingness-to-pay to preserve the architecture and the nature in Kakunodate. The survey uses a double bounded dichotomous choice model to elicit the various levels of tourists preference in various scenarios. Response from more than 1,000 tourists in three scenarios were collected. Through a maximum likelihood method and a subsequent truncated calculation, results are reported.

The results support the conceptual argument that the art of nature adds value to the art of architecture only. Tourists are found to be willing to pay more to support both the architecture (samurai houses) and nature (cherry trees) than the samurai houses alone.

The research findings add to the inventory of research on prior works in heritage trees, conservation of trees and heritage tourism, and cultural heritage assets in general. The empirical findings support prior theoretical works that examined the relationship of nature and art, art and architecture, and architecture as visual consumption.

The findings have managerial implications for policy makers relative to a possible increase of revenue by adding accompanying-nature component to focal architectural assets when soliciting funding support.

The originality and this piece stems from extending trees as an art form in nature and its added value to architecture within the context of cultural heritage assets. The empirical findings add to the much discussed relationships among art, nature, and architecture.

Outlines the threat posed by landslides in Great Britain, and examines the ways in which potential problems can be identified and accommodated by developers and engineers in the light of changes in the Building Regulations for England and Wales which took effect on 1 June 1992. Explores the causes of landsliding, and suggests the appropriate investigations which should be instigated by the developer if suspecting instability. Discusses remedial measures and presents a study of landslide management with the example of Ventnor on the Isle of Wight. Mentions the Planning Policy Guidance issued by the Department of the Environment, which advises local authorities, landowners and developers on the role of planning controls as a landslide management tool.

THE article which we publish from the pen of Mr. L. Stanley Jast is the first of many which we hope will come from his pen, now that he has release from regular library duties. Anything that Mr. Jast has to say is said with originality even if the subject is not original; his quality has always been to give an independent and novel twist to almost everything he touches. We think our readers will find this to be so when he touches the important question of “The Library and Leisure.”

According to the critic Tom Lubbock, ‘Cloth is the universal free element. It doesn't have to explain itself. It performs’ (Lubbock, 2002). Cloth drapes and folds, becoming a membrane separating what is outside from what is inside. In this chapter, I draw on the writings of de Certeau, Rendell, Tschumi, etc. to develop ideas concerning the ways in which the use and understanding of textiles may move our perceptions of the boundaries of space, and the location of place. I argue that cloth may contain the identity of place, and that lace and lace net-works provide a starting point for the exploration of fluid space as described by Isozaki, Ishigami, etc. ¹ I also discuss those structures/mise-en-scène which frame our awareness and interpretation of place and space. Examples of work drawn from art, cinema and architecture are used to illuminate those ideas which question the materiality and purpose of form and enclosure.

Transdisciplinarity was the core subject of a special issue of Futures in 2004 including numerous cases of interdisciplinary and transdisciplinary architectural and urban research and professional practice in several countries. This paper takes stock of achievements during the last 20 years before presenting challenges about bridging persistent gaps between theory, research and practice.

The special issue of Futures is a benchmark for numerous publications about transdisciplinarity in and beyond the multidisciplinary and intersectoral field of built environments. This paper presents a narrative literature review of publications about transdisciplinarity in architecture, urban design and planning since the 1970s.

Transdisciplinarity is still being debated, is often contested, and is not mainstream in research or practice. Like design practice, transdisciplinary inquiry is a creative process involving border work by participants in collaborative projects. Transdisciplinary inquiry is broader in scope and purpose than public participation, participatory action research and team science.

This paper discusses challenges that should be addressed by those in the field of built environments who endorse transdisciplinarity. Based on a half century of contributions about design theory and methods, the paper differentiates inquiry from research as fundamental to transdisciplinary projects.