Microwave phenomena in liquids and solids

Papers on the subject of microwave dielectric measurements and their interpretation which were published or received in this country in 1947 are reviewed below. It is interesting to note the large number of foreign contributions in this field. The trend in the design of measuring instruments reveals definite advances in their precision and versatility. The results of microwave dielectric measurements have substantially aided our -understanding of dielectric phenomena, especially those involving polar molecules. On the practical side high-power magnetrons have been developed along with techniques for using microwaves in dielectric heating.