PORTRAITS OF PHYSICISTS 839

The pendulum derives its name from JeanB. L. Foucault, French phys-icist who, in 1851, demonstrated the earth^s rotation through the useof a long, heavy-bob pendulum suspended under the dome of the Pantheonin Paris.

(N.B. The head of the physics department, whose idea is responsiblefor the installation of the pendulum, will be glad to give additional detailsabout it. Also, if desired, pictures of science students timing the swingwith a stop watch or adjusting different parts of the apparatus may bearranged by calling Briargate 7161 or addressing, Physics Department,Mundelein College, Chicago.)

PORTFOLIO OF PORTRAITS OF EMINENT PHYSICISTSA portfolio of portraits of twieve eminent non-living physicists is in

preparation, to be published by the journal Scripta Mathematics with theeditorial assistance of a committee representing The American PhysicsTeacher. The physicists whose portraits will be included are: Newton,Galileo, Huygens, Ampere, Fresnel, Faraday, Joule, Clausius, Maxwell,Gibbs, Hertz, and Rowland. Each portrait will be approximately 25 X36cm. and will appear in a separate folder along with a biographical sketchwritten by Professor Henry Crew. Since publication will not be under-taken unless there is evidence of some demand, those who are interestedin having such a portfolio made available should send their orders immedi-ately to Scripta Mathematica, Yeshiva College, New York City. Thereduced pre-publication price is two dollars, payable upon delivery.The committee for making the plans consisted of R. T. Birge, Henry

Crew, W. F. Magie, Duane Roller, L. W. Taylor, E. C. Watson, andJ. Ginsburg, Editor of Scripta Mathematica. The committee made no pre-tension of being able to determine the twelve most eminent physicists ofall time, but tried to select physicists who were truly great and whoseportraits are likely to be of interest to Americans. Account also had to betaken of the fact that authentic portraits are not avialable in some cases.Since the committee consulted a number of other physicists in this country,its selections give some indication of American opinion regarding greatphysicists. For this reason it is of interest to know that, from an originallist of some 50 names, good agreement was obtained on a list of 20, whichincluded, besides the 12 finally chosen: Archimedes, Boltzmann, GilbertHelmholtz, Kelvin, Kirchhoff, Oersted, and Rutherford. Other namesseriously considered by one or more members of the committee were Alha-zen, Black, Carnot, Coulomb, Henry, Lorentz, Rayleigh, Roentgen, Volta,Rumford, Stevin, and Young.

GLASS CENTERA history of the glass industry, from the most primitive days 4,000 years

ago when glass was first made to the glass world of tomorrow, when glassfabrics will be an important and widely-used material, will be presentedjointly by three of America’s largest glass manufacturers at the New YorkWorld Fair of 1939.

Actual manufacturing processes by which bottles, containers, bulbs,windows and other articles are made by machine methods will be shownin the Fair^s Glass Center. Taking part in the exhibit are the CorningGlass Works, Owens-Illinois Glass Company and the Pittsburgh PlateGlass Company.