lor the Dooming NEWS SCRIPTS Seamless Flooring market Seminars for secretaries
An exciting lineup of new profit opportunities D Nonyellowing urethanes for where the sun hits hardest D New, low odor, moisture curing urethane resins D New systems for maximum build D Resins already "performance proven" for general use D Spencer Kellogg offers a complete variety of mois ture curing and prepolymer resins . · . each to satisfy specialized re quirements of seamless flooring technology. The full, colorful story is yours in the new, fourcolor "SK Sun & Shadow Resins" Brochure. Investigate how to get your share of this multimillion dollar market. Send for your copy today. Spencer Kellogg Division of Textron Inc. Buffalo, N.Y. 14240
33
Atextron I Division Please send me t h e "SK Sun & Shadow Resins" Brochure. We are Π manufacturing or Π considering the manufacture of Seamless Floor ing Systems for the Π Commercial Π Do-It-Yourself Markets. Π Please have your representative call.
The Management Center of Cam bridge, in Burlington, Mass., has de cided to offer one-day seminars in half a dozen different cities designed "to help the professional secretary with her self-management responsibilities." For $60 or $65 per head, depending on how many from a given company sign up, a girl can gain a better under standing of her: • Attitudes, motivations, and tem perament. • Leadership potential and followership preferences. • Sensitivity to opportunities and potential friction. • Impact upon others. • Ability to apply creative princi ples to on-the-job demands and her personal growth. Each participant gets a certificate of completion.
Physics like it is Research engineer R. C. Piercy of Sheridan Park, Ontario, Can., has re discovered an old list of "definitions and observations, mainly factual" made by his high-school physics class almost a decade ago. Although they are observations on the phenomena of physics as practiced in high schools, reader Piercy writes, "many of them can be appreciated by anybody trying to perform experiments. ,, Here are a few of these bon mots: • Archimedes was wrong, wrong, wrong! • How high the hydrometer bounces off the bottom determines the density of a liquid. • The weight of a liquid displaced by a floating body depends on how hard you press on the body. • A microscope enables one to see more clearly the fingerprints on the lenses. • A freely suspended magnet will always point to the nearest tap. • The Doppler Effect: A car horn sounds different to a pedestrian before and after he is hit by the car.
Name
Baseball not scientific
Title
Seville Chapman of the Cornell Aero nautical Laboratory, in Buffalo, has contributed to the literature of phys ics a paper ( 1 ) for which the abstract reads: "A baseball fielder will arrive at the right place at the right time to catch a fly ball if he runs at the only
Company Address City
State
72 C&EN DEC. 2, 1968
Zip
constant velocity for which the rate of change of tangent of the elevation angle of the ball and the bearing angle of the ball both remain constant. Remarks are made concerning curve balls. Baseball is not a scientific game—although, unknown to the players, many principles of physics can be applied to it." Dr. Chapman goes through some trigonometric manipulations that make his point and concludes that "baseball is still a great game," even though the players regularly shag fly balls without benefit of a knowledge of the laws of physics. Also grounders. The remarks concerning curve balls note that the normal hook deviates from a ballistic trajectory perhaps 1 foot in 60. However, the CAL team, champions of the Cheektowaga Indus trial League, has built a pitching ma chine that can produce five times that deviation. Photographs, Dr. Chap man says, show no evidence that the machine-made curve breaks, that is that the radius of curvature of the ball's trajectory changes abruptly a few feet from the batter. He doesn't doubt that the break exists, but knows of no hard evidence, either theoretical or physical, that shows whether the phenomenon is real or psychological. Not mentioned specifically is the hang ing curve, the type that tends to dis appear in the cheap seats. (1) Am. J. Phys., 36, 868 (1968).
The screwworm vs. USDA The worst screwworm outbreak in six years has hit the Southwest, where the number of confirmed cases had reached 9500 by Nov. 19, compared to only 872 in all of 1967. The U.S. Department of Agriculture stepped up the output of sterile screwworm Hies to 200 million per week, but heavy rains and moderate temperatures are giving the screwworm the breaks.
Department of obscure information • J a p a n consumed 2080 kwh. of electricity per capita in 1966. • The asteroid Icarus is about 0.5 mile in diameter and rotates about once every 2.5 hours. • About 48% of U.S. adults visited a dentist in the past year. • Nonfederal immunization of chil dren with the Schwarz-strain common measles vaccine since February 1965 will have saved the nation $307,204,527 by the end of this year.
