During a period of about four decades following World War I, gasoline was often deodorized at refineries by treatment with alkaline solutions of lead oxide, a procedure generally denoted ‘doctor sweetening’. Contemporary accounts describe it as old, but are generally vague about its origin. This paper traces the early history of the treatment of petroleum distillate by alkaline plumbite solution, dating back to 1866 when it was introduced in Germany by Rudolf Wagner. After 1869, this procedure became the preferred method (...) for deodorizing Canadian kerosene and other petroleum products which were afflicted by unusually high sulphur content. Subsequently, Hermann Frasch improved on this method by distilling the afflicted petroleum in the presence of solid metal oxides. (shrink)

This is a clear assessment of Hume's theories of the self and personal identity, including his famous Treatise on Human Nature . Pitson provides a critical exploration of his thinking, also examining the continuing relevance of Hume's theories for contemporary philosophy and relating it to his broader reflections on human nature itself. Divided into two parts, Pitson's study follows Hume's important distinction between two aspects of personal identity: the "mental" and the "agency". The first part discusses Hume's conception of the (...) mind as a "bundle" or "system" of perceptions and explores Hume's position on the traditional mind/body problem. In the second part Pitson examines a range of topics including Hume's treatment of character, the relationship between human and animal nature, and the nature of agency. (shrink)

We introduce a multimodal logic for order of magnitude reasoning which considers a new logic-based alternative to the notion of closeness, we provide an axiom system and prove its soundness and completeness.

Many years ago Wilamowitz desiderated a systematic collection of the texts which relate to the different types of poetry composed by the great lyric poets of Greece. He hoped that if we could only crystallize our admittedly scanty information about the characteristics of, say, the Paean or the Dirge, we might be able to reach a slightly better understanding than we have now of the formal structure and artistic design of the poems and fragments which have come down to us (...) under these titles. Indeed, this kind of knowledge is very important. (shrink)

OBJECTIVES: To report the outcome of applications to 43 research ethics committees. SETTING: Four regional health authorities in England. FINDINGS: The research ethics committees varied considerably in their practices. The time lapse until notification of the outcome of the approval ranged from just under one week to 23 weeks with a mean of 8.6 weeks. Four research ethics committees failed to notify the research team of an outcome of their request for approval. CONCLUSION: A national research ethics committee is needed (...) to review national and multi-location research studies in the light of the fragmented and variable practice of local research ethics committees. (shrink)