To determine the uniformity attained by top blending, fibers were counted in samples of finished fabrics made of eight blends of 3-den. rayon or nylon with coarse or medium wools. The composition by number of fibers was then converted into composition by weight. The re sults agree with the manufacturing specification and with chemical analyses by the potassium hy droxide method. The average of samples consisting of at least 500 fibers indicates that the blending is uniform. When fibers of different diameter and density are blended, the composition by number of fibers differs markedly from the composition by weight, as would be expected. The composition by number of fibers is a factor in the dyeing, finishing, and hand of the finished fabric and should be taken into consideration in the manufacture of blended fabrics.

The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format. | 1. In a herd of 760 animals which has for years been more or less regularly tuberculin-tested and in which for years no case of tuberculosis was found quite a large number of animals showed sensitization at an annual test, when using 3 mgm. per c.c. P.P.D. Onderstepoort tuberculin. When testing half strength against full strength tuberculin in this herd, the number of reactors with the half strength were statistically significantly smaller than those with the full strength tuberculin. 2. In testing full strength against half strength tuberculin on a positive herd of 62 animals, the results were: - 39 positives were found with 3 mgm. and 31 with 1•5 mgm. 10 retests were found with 3 mgm. and 16 with 1•5 mgm. 13 negatives were found with 3 mgm. and 15 with 1•5 mgm. If one can make a statistical analysis of only 62 animals, then the difference in the number of positives (39 and 31) even though some of these are false positives, is not highly significant but nevertheless significant. However, when one considers the total number of reactors (positives and retests) to full strength and half strength which are 49 and 47 respectively, the difference is statistically insignificant. Since some of these so-called positives were believed to be actually free from the disease and others in a state of generalization, this herd was not considered to be very suitable for testing out the half strength against the full strength tuberculin. 3. In the case of 18 animals showing what is regarded as normal sensitization to tuberculin, full strength, half strength and 20 per cent full strength tuberculin gave for all practical purposes comparable end results. The size of the reacting swelling seems to be closely related to the potency of the tuberculin used. 4. Taking the above results into consideration, it would seem that a very much less potent tuberculin than is ordinarily being used, would be suitable for the single intradermal test, with the advantage that a smaller number of animals having a tuberculin sensitization to non-specific factors, will be condemned for tuberculosis, when they are in fact false positives. 5. Owing to the small numbers of animals dealt with, one is not justified in laying down what the optimum concentration of tuberculin, for the single intradermal test should be, but a case seems nevertheless to have been made out for a critical examination of the whole question, on a sufficiently large number of animals, using at the same time also sufficient animals, infected with conditions such as skin lesions, Johne's Disease, Actinomycosis etc., showing tuberculin non-specific sensitization.

Seed treatment with lindane has proved to be an effective, economical and relatively safe method for the control of wireworms and the seed-corn maggot affecting germinating seeds of a number of vegetable and field crops.

At the end of February 1950 investigations on zooplankton were initiated in some fjords south of Bergen on the west coast of Norway, and continued during 1951. Simultaneously hydrographic observations were also taken. Of all copepods occurring Calanus finmarchicus was the most important. The highest numbers were observed in 1950 in May and July, and in 1951 in April and July. When the maxima of Calanus finmarchicus occurred the greater part of the stock was found in the upper 50 m. water layers. Spawning took place in Februar-March, May-June and in September, the most important one in May-June. Pseudocalanus minutus was, next to Calanus finmarchicus, the most important species in the upper 50 m. Maximum number occurred in July both years. Temora longicornis was found to be most numerous in July and Acartia clausi in July and September. The larger copepods Pareuchaeta norvegica, Calanus hyperboreus, Metridia longa, M. lucens and Chiridius armatus were found sparsely in the upper water layers. In the deeper hauls they were more numerous and because of their size made up a greater part of the volume, this was especially the case in the outer districts. Of other organisms Limacina retorversa was very abundant in July 1950 but sparsely present during 1951. The highest total number of organisms occurred in May, July and September 1950. The largest volume of plankton were found in May and July 1950 and in April and July 1951. A longitudinal section of the Hardangerfjord showed great differences from the inner to the outer part of the fjord, the volume of plankton being much higher in the outer part, especially in the deeper hauls. The Lusterfjord in Sogn was entirely different from the fjords in the Hardanger area. The total number of organisms and the volume of plankton were much smaller here. The greatest percentage of fat was found in May and July, and of protein in May, July and September in the upper 50 m. during 1950. The deeper hauls showed a great percentage of fat and protein in the late autumn. The maximum in olume of plankton and the highest percentage of fat coincided with the maximum in number of Calanus finmarchicus. A comparison is made with previous work in this and other areas.

The results of investigations covering a number of years are reported. Crown rot is caused by Aspergillus niger. Pre-emergence rot is due to Rhizopus arrhizus, Aspergillus niger and probably other organisms. Seed treatment, particularly with organic mercurial fungicides and the organic fungicide thiram, improves field emergence, sometimes to a remarkable extent. The previous cropping history of the soil has a marked influence on losses from pre-emergence crown rots.

DDT is the most effective and economically feasible material to use for the control of the codling moth on walnuts in southern California. It has been used successfully under a variety of conditions for a number of years in the field. At present there is no indication that the codling moth larvae are becoming resistant. DDT is compatible with all of the more effective aphicides and miticides recommended for use in walnut pest control.

Many of the Coccoidea are of economic importance in Queensland, and while elucidating the species and recording their hosts it has become evident that a better understanding of the systematics of this superfamily is essential. Examination of the large amount of material available has revealed a number of new species. In preparation for more extensive publications based on work with these insects, two new species in the tribe Aspidiotini, Neoleonardia chitinosa and N. altiformis, are now described.