Stevenson, Donald

The second kind of laser was built by one of my former students, Mirek Stevenson, and one of Bloembergen s former students, [Peter] Sorokin, at General Electric. The third kind of laser was built at Bell Laboratories by one of my students in microwave spectroscopy, Ali Javan. He worked with Bill Bennett [William R. Bennett, Jr.], one of Kusch s students, who had been working in microwave spectroscopy at Columbia. This new laser was the helium-neon gas laser, built by Javan, Bennett and [Donald R.] Herriott, who was an optical guy. The next type was a semiconductor laser, which was built at General Electric by [Robert N.] Hall. 

Stevenson SH, Donald DS, Meredith GR (1988) Mater Res Soc Symp Proc 109 103... 

Donald Stevenson and Keith Miller, Analytical Chemistry by Open Learning Microprocessor Applications, Wiley, Chichester, 1987. 

It doesn t take all that long, really, physicist Donald Stevenson shouts over the din. (A sign outside warns that the noise is at a level which requires ear cover if the experimenter is inside for more than 90 minutes) Pointing to the small opening at the top of the gleaming magnet stack, he explains ... 

Submitted by Donald Stark and R. M. Hixon. Checked by John R. Johnson and H. B. Stevenson. 

If calcium chromate be treated with a soln. of potassium sulphate, the calcium chromate is converted into calcium sulphate, which is precipitated, and potassium chromate, which remains in soln. Instead of leaching the calcium chromate with a soln. of potassium sulphate, W. J. Chrystal showed that if ammonium sulphate is used, a soln. of ammonium chromate is produced, and J. J. Hood found that if the soln. of potassium salt be treated with sodium hydrosulphate, potassium sulphate crystallizes from the soln., while sodium dichromate remains in soln. According to F. M. and D. D. Spence and co-workers, if a mixtiu-e of ammonia and carbon dioxide be passed into the aq. extract of the calcium chromate. Calcium carbonate is precipitated while ammonium and alkali chromate remain in soln. If the liquid be boiled, ammonia is given off, and sodium dichromate remains in soln. S. Pontius used water and carbon dioxide under press, for the leaching ptocess. J. Brock and W. A. Rowell purified alkali chromite by treating the soln. with strontium hydroxide, and digesting the washed precipitate with a soln. of alkali sulphate or carbonate W. J. A. Donald used calcium hydroxide or barium chloride as precipitant. A mixture of chromite with calcium carbonate and potassium carbonate was formerly much employed. Modifications of the process were described by W. J. A. Donald, A. R. Lindblad, C. J. Head, 8. G. Thomas, W. Gow, J. Stevenson and T. Carlile, L. I. Popoff,G. Bessa, P.Weise, P. N. Lukianoff,... 

Richard B. Hallick, David A. Christopher, Donald W. Copertino, Robert G. Drager, Ling Hong, ICristin P. Nelson, Catherine Radebaugh, Jennifer K. Stevenson, Noreen J. Sleator, and Gloria Yepiz-Plascencia. 

E. C. Jungfleisch suggested that the action of manganese dioxide is chemical potassium permanganate is alternately formed and decomposed. E. J. Mills, G. Donald, and S. J. Stevenson thought there was nothing abnormal in the reaction and it was unnecessary to invoke a special catalytic force . F. Bellamy proposed the reactions ... 

S. H. Stevenson, D. S. Donald, and G. R. Meridith, in Nonlinear Optical Properties of Polymers, Materials, Research Society Symposium Proceedings Vol. 109, edited by A. J. Heeger, J. Orenstein, and... 

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