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Pyrolyses of the above cyanides and acetamide have been carried out by the aniline-carrier technique. Ethyl cyanide decomposes by three reactions yielding ultimately hydrogen, methane, and ethylene as gaseous products; the decomposition to give a methyl radical is a first-order homogeneous reaction with (686-765') : log k (sec.-l) = 14.1 -(72,700/2.3RT). The analogous reaction for t-butyl cyanide has (602-652") : log k (sec.-l) = 15-2 -(70,200/2.3RT). The rate-determining step for the production of methane in the pyrolysis of cumyl cyanide is of the first-order and homogeneous with (520--624"): log h (sec.-l) = 12-3 -(54,100/2.3RT). The methane probably arises from bond rupture in the nitrile yielding a methyl radical, but it is possibly produced by direct molecular elimination. Acetamide decomposes mainly by the molecular elimination of ammonia for which the rate constant is (663-747") log k (sec.-l) = 14.7-(73,400/2.3RT). * Calculated from AH," (Me) = 33.9 and AH," (Pr') = 17.6 kcal. mole-' (ref. 13). t Ref. 3.Obviously the introduction of a CN group into a molecule considerably weakens the adjacent C-C bond and the effect is fairly consistent throughout the short series of compounds studied.

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These creative acts compose, within a historical period, a specific community: a community visible in the structure of feeling and demonstrable, above all, in fundamental choices of form.I had become convinced … that the most penetrating analysis would always be of forms, specifically literary forms, where changes of viewpoint, changes of known and knowable relationships, changes of possible and actual resolutions, could be directly demonstrated, as forms of literary organization, and then, just because they involved more than individual solutions, could be reasonably related to a real social history. [Raymond Williams]In the waning years of the seventeenth century Sir William Petty, F.R.S., a talented statistician, champion of trade and commerce, and “projector” of schemes for national betterment, drew up a plan to cope with what he, at least, saw as a major problem. Petty had observed that there were large numbers of English youth from respectable families who had not the leisure, money, nor opportunity to travel to foreign countries. He was concerned that these worthy young men would miss the chance to develop the expansive faculty of mind and commercial acumen that foreign travel provided and national progress demanded. The crux of his scheme was that these youths would repair to London, where they would encounter businessmen around the Royal Exchange “who have fresh concerne & correspondance with all parts of the knowne world & with all the Commodityes growing or made within the same.”