Mobile Bay turbidity study

The termination of studies carried on for almost three years in the Mobile Bay area and adjacent continental shelf are reported. The initial results concentrating on the shelf and lower bay were presented in the interim report. The continued scope of work was designed to attempt a refinement of the mathematical model, assess the effectiveness of optical measurement of suspended particulate material and disseminate the acquired information. The optical characteristics of particulate solutions are affected by density gradients within the medium, density of the suspended particles, particle size, particle shape, particle quality, albedo, and the angle of refracted light. Several of these are discussed in detail

On the use of the foot in some mollusks

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Variation of the Intensity of the Spectral Lines of Mercury with the Velocity of the Exciting Electrons

A study has been made of the variation of the intensity of the spectral lines of mercury when excited by impact of electrons of controlled velocity. In accordance with some earlier observations by Dr. J. A. Eldridge, it is found that the lines divide into two classes. In one class the intensity of the line increases uniformly from zero to a certain limit as the velocity of the electrons increases above the minimum exciting velocity. In the other class the intensity rises rapidly to a maximum at a velocity not far above the minimum exciting velocity, and then decreases to a certain limit

A Demonstration of Dielectric Hysteresis in Rubber

During research in connection with the development of an electrostatic loudspeaker, an effect was discovered which led to some measurements on the attractive force between plates in a flat condenser. With the dielectric between the plates consisting of a layer of rubber dam in combination with a layer of air, the curves of attractive force vs. potential difference show a striking similarity to magnetic hysteresis curves

Literary Careers: Breaks and Stalls

In his article, Literary Careers: Breaks and Stalls, W. Ray Crozier argues that biographical evidence points to considerable individual variation in writers\u27 output over the life span even when allowance is made for longevity and length of writing career. This issue has been neglected by psychological accounts of creativity. Crozier outlines a theoretical framework for understanding variation in terms of an artistic career. This is conceptualised as a sequence of projects, the success of which are influenced by intra-project factors such as the rewardingness and difficulties of literary projects and extra-project factors such as work pressures, poverty, and competing demands on time. This account is compared to an explanation proposed by Dean Keith Simonton, which emphasises the reduction over time in the potential to produce new work. The framework is applied to the analysis of biographical material on six writers of fiction who were all critically acclaimed writers who lived until at least their eightieth year but who were among the least productive in a large sample of twentieth-century British novelists