The data presented in the accompanying charts and tables were taken directly from the 1951 Local Climatological Summary issued for 266 Weather Bureau Offices in the continental United States, 16 in Alaska, 5 in certain island of the Pacific and 2 in the West Indies. The charts cover only the continental United States but data for all these locations are shown in the table. The computed mean values shown are based on the official records at each location.

In view of the reported good growth of tropical kudzu, Pueraria phaseoloides javanica, in acid soils (pH 5.5 and below) and the use of nitrogen fertilizers to establish kudzu stand, this study was initiated to determine the effects of liming and nitrogen on yields and nodulation. The tropical kudzu was grown in the greenhouse on Lares clay, an acid lateritic clay with a pH of 4.4. The treatments consisted of a control, nitrogen (1,200 pounds of ammonium sulfate), calcium (10,000 pounds of CaCO₃), nitrogen plus calcium, and borax (30 pounds) plus calcium. All treatments received P₂O₅ and K₂O at a rate of 100 pounds each per acre. The kudzu was harvested at a crop age of 3 months. The use of nitrogen increased yields significantly over the control with no nitrogen, but the number of nodules per plant decreased very significantly from 59 nodules per plant to 10 nodules per plant. The lime treatment gave higher yields than the control, but not as high as the nitrogen treatment; the number of nodules per plant, however, was highest for the lime treatment. The use of lime and nitrogen in combination gave the highest yields, but the number of nodules per plant was reduced to the same as the treatment with nitrogen only. Lime and borax together gave high yields, parallel to the nitrogen treatment, but the number of nodules per plant was the lowest obtained for any treatment. The nitrogen content showed no statistically significant difference for any treatment.

The resistance to abrasion of sixteen cotton fabrics, which varied systematically in warp and filling yarn number and in ends and picks, was determined with the Schiefer abrasion testing machine, using No. 600A silicon carbide waterproof abrasive paper as the abradant and a total load of 2 lbs. on the specimen in one testing procedure, and a blade abradant and a total load of 20 lbs. on the specimen in a second testing procedure. The rate of abrasion in the first testing procedure was over ten times as great as that in the second. The results for the testing proce dures could be represented very well by the following equations: where R is the number of rotations of the abradant, W is the warp yarn number, F is the filling yarn number, E is the ends per inch, P is the picks per inch, and the other quantities are con stants. It was found that the rankings of the sixteen fabrics were different for the two testing procedures. This difference is due mainly to the fact that a given change in any one construc tion factor does not always result in quantitatively comparable changes in the resistance to abrasion obtained by the two procedures. This sort of difference is obtained, and should be expected, when comparing results of highly accelerated laboratory abrasion tests with results of comparatively slow rates of wear in service or performance tests. The resistance to abrasion of eight other fabrics of intermediate constructions obtained with each abradant agreed very well with the values computed by using the above two equations.

Three preliminary plot experiments and eight field experiments with Irish potato seed tubers were anahsed in order to find out the effect of desprouting prior to planting upon the whole production, percentage of failures and of large tubers (more than 80 grams). The following conclusions can be drawn: a) seed tubers in which the sprouts were left gave higher yields, a smaller percentage of failures and greater percentage of large tubers ; b) when desprouted only once, it was noticed that yield was smaller but not significantly ; the number of large tubers was smaller and the percentage of failures was a little higher ; c) when the tubers were desprouted twice it was less favorable than a single removal of the sprouts ; the tuber yield and the number of large tubers were smaller and the percentage of failures was still higher ; d) when the sprouts were removed three times the yield was still lower; the percentage of failures was very high but the quantity of large sized tubers, as compared with the number when desprouted twice, did not change. The tubers desprouted three months after the begining of sprouting, gave the poorest results particularly when it was done more than once.

General rules for the pressure loss of flow across wire screens and simple fabrics are devired herein from the available test data. At higher Reynolds numbers the results obtained agree satisfactorily with the Borda-Carnot theory, which considers the dynamic losses to be due to a sudden expansion of the cross section behind the openings of an obstacle. On the other hand, at very low Reynolds numbers the pressure loss seems to be proportional to the velocity, corresponding to the Hagen- Poiseuille kind of flow. In the intermediate range of the Reynolds number the loss coefficient is found by statistical analysis to be a function of this number and the solidity ratio of the material.

A 2-year field study was conducted to determine the possibility of supplementing soil and symbiotically-fixed nitrogen of soybeans with nitrogen fertilizer. In 1947, during a hot dry growing season marked responses were obtained from added nitrogen. The number of nodules per plant decreased 80 to 90%, there were appreciable increases in seed yields, nitrogen content of the seed increased, and oil content decreased. In 1949, with adequate rainfall, moderate temperatures, and 30 to 40 days additional growing season there was little to no response to added nitrogen. The number of nodules per plant on the untreated plots was larger than in 1947, and the largest application of ammonium nitrate resulted in only a 35% decrease in number of nodules. The yield of seed increased very little, and no change occurred in the nitrogen and oil contents of the seed. A comparison of three dates of side-dressing with plow-down treatments indicated that the most effective utilization occurred with plow-down applications. This experiment helps explain some of the variation in response of soybeans to nitrogen fertilizers. Rainfall and temperature conditions during the growing season apparently have a direct influence on the sufficiency of symbiotically-fixed nitrogen for maximum yields, thus indirectly influencing the response to added nitrogen.

Phosphatic fertilizers applied to Vaencia orange trees improved foliage growth and color, the fruit quality and increased the number of fruits set.