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Observations are reported on phase separation in copper‐zirconium noncrystalline alloys that were prepared using two‐source magnetron‐sputtering vapor‐quench techniques. The phase separation occurred during synthesis and was observed over the composition range Cu‐25–65 at. % Zr. Evidence from x‐ray analysis, differential thermal analysis, transmission electron microscopy, and electrochemical behavior are presented. These results are discussed and compared to reported observations on liquid‐quenched noncrystalline copper‐zirconium alloys.

A Cosslett‐Nixon type microfocus x‐ray tube has been modified for use as an electron probe microanalysis unit, producing an electron beam of adequate intensity approximately one micron in diameter. The design of the unit is discussed, and a description of the electron optical design and the associated electronic power supplies is included.

Reproduction of the red flour beetle, Tribolium castaneum (Herbst), was lower on whole grain than has been reported on milled grain in earlier studies. Generally, fecundity increased with increasing temperature (20-32°C) and moisture (10-16%). However, interaction of adult survival and fecundity caused net reproduction to peak at 27°C and 16% moisture. This resulted from greater adult survival with increasing moisture, but decreasing survival with increasing temperature.

Planting time applications of Furadan and Counter insecticides were applied to cornfields for rootworm control at 12 locations in eastern Nebraska in 1976. All fields had a history of annual applications of Furadan for the 3+ years prior to 1976. In 1975, 6 of the fields (1-6) were judged by the authors to have unsatisfactory rootworm control. Insecticide treatments were applied over the row in a 7 inch band (incorporated by drag chains and a following rake) at 1.2 oz a.i./lOOO ft of row. Design was randomized complete block with 4 replications excepting locations 1 and 3, (3 rep). Location 4 (2 rep) and location 12 (8 rep).