The Math Behind Who is Number One?

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Atmospheric lidar research applying to H2O, O2 and aerosols

Experimental research on a near infrared tunable dye laser was reported, and theoretical simulations were presented for various lidar configurations. The visible and nearinfrared wavelengths considered were suitable for observations of aerosols, water vapor, molecular oxygen pressure and temperature in the troposphere and above. The first phase of development work was described on a ruby pumped, tunable dye laser for the wavelength region 715 to 740 nanometers. Lidar simulations were summarized for measurements of H2O and for two color lidar observations of aerosols in the atmosphere

A Pattern in Hot Lunch Service for Rural Schools

That the serving of a hot lunch in a rural school may offer an opportunity to teach habits of cleanliness, sanitation and simple cookery, to the school children, has been proved by the Big Springs school in Cedar township, Linn county Iowa

For Those Who Have Difficulties in Home Dyeing

Dyeing as a household practice, is almost as much abused as is dieting, said Miss E. Phillips, expert dyer for the North American dyeing corporation in a lecture before a group of home demonstration agents not long ago

Genuinely Big Business

The Homemaker\u27s second editor returns to the pages of her first love to write about her last love, homemaking

Absorption of Nutrient Ions by the Tomato Plant at Various Stages of Development

In studies with herbaceous annuals, it has often been observed that characteristic changes in metabolism and rate of growth are closely associated with certain stages in the development cycle (Loehwing, 1942, 1948, 1951; Murneek, 1937; Wittwer, 1943). Of particular interest have been changes accompanying synapsis and syngamy. One of the changes following these stages appears to be a marked acceleration in the rate of inorganic ion uptake from the substrate. Such accelerations have been shown to follow floral initiation and formation of the embryo in several plants including barley (Burd, 1919), corn (Hornberger, 1882; Jones and Huston, 1914), cotton (Olson and Bledsoe, 1942) and tobacco (Vladescu, 1934). Al though it has been reported that the largest increment in nutrient absorption by the tomato plant occurs during flowering and fruiting (Hester, 1938; Hester et al., 1951), this plant has apparently not been examined critically to determine whether two maxima are present within this period of stimulated uptake. This investigation was initiated to determine whether the rate of ion absorption by the tomato plant was correlated with particular stages in development

The Adaptability of Several Histological Techniques to the Preparation of P32 Radioautographs from Plant Tissues

With the increased use of radioactive isotopes in plant research, there has been a corresponding increase in the application of radioautographic techniques. Through the use of such radioautographs, tissue localization of the radioactive elements has been accomplished thereby giving additional insight into the accumulation and role of various elements in specific tissues. One of the radioactive elements that has found widespread application in physiological research is P 32. Although a number of workers have prepared P32 autographs from unsectioned plant tissues, very few have been made using histological sections (McIlrath, 1948). Because of the widespread use of this radioactive element in plant research and the very few histological radioautographs found in the literature, this problem was undertaken to determine which of several histological techniques might be adaptable to the preparation of such radioautographs

Playing the Game of Health With Yardstick and Scales

How can we bring about better health conditions for our children, not only in our homes but in our community and in our schools? We realize the necessity for some sort of nutrition work among the children of our community, but whose place is it to launch a health project? These questions are being constantly asked by Iowa communities and organizations which are anxious to establish some sort of a comprehensive health program for their underweight and malnourished children