8School Science and Mathematics

V== A/��y soWhat velocity was given to an Air Force rocket fired on October

22, 1957 from balloons at a height of 20 miles from the earth^s sur-face if the altitude reached was "more than 4,000 miles" into space?What is the velocity of escape of an object from the earth? From themoon? Answers to these latter questions will furnish an explanationfor the lack of air on the moon^s surface.

These and many other similar questions should offer fascinatingstudy for.the more capable students who have a background in alge-bra. Remember that algebra is a language for the expression ofquantitative relationships. At the heart of this language lies suchconcepts as variables, constants, and variation. Why not call uponthe Sputniks to help students give meaning to and see the applica-tions of these concepts?

REFRIGERATION GASES MAY SOLVE MISSILELUBRICATION PROBLEM

The chemical that cools the housewife’s refrigerator may help solve a majorhigh-temperature lubricating problem in missile and aircraft development.

Several gases of the Freon family, a widely-used refrigerant, have been foundto lubricate some metal alloys at temperatures up to 1,200 degrees Fahrenheit.The gases combine chemically with the metal to be lubricated and form a film

that reduces friction. However, not all Freon gases will react in such a waywith all metals.One of the gases -is an effective lubricant for certain steels at lower tempera-

tures, but above 600 degrees the metal was corroded. In view of the corrosiveaction, research has been turned to the use of nickel and cobalt alloys. It hasbeen found that gases containing bromine atoms were more effective withnickel alloys, and gases containing chlorine had superior lubrication propertieswith cobalt alloys.

SUMMER FELLOWSHIPSPurdue University announces the seventh annual all expense General Electric

Summer Fellowship Program in mathematics for junior and senior high schoolteachers from June 22 through August 1, 1959. Courses in the program carrygraduate credit. Eight semester hours may be earned. Any secondary schoolteacher of mathematics who teaches in Illinois, Indiana, Iowa, Kentucky,Michigan, Minnesota, Missouri, Ohio, Tennessee, West Virginia, Wisconsin, hasa bachelor’s degree, has had differential and integral calculus, and has notpreviously held a General Electric Summer Fellowship in Mathematics or Scienceis eligible.

This program is sponsored by the General Electric Educational and CharitableFund in cooperation with the Department of Mathematics and Statistics.Further information and application forms may be obtained by writing

GENERAL ELECTRIC SUMMER FELLOWSHIP PROGRAMDepartment of Mathematics and StatisticsPurdue UniversityLafayette, Indiana