The writer makes it clear that the difficulties Japan's paper industry is facing are in the shortage of raw materials, that Japan need not be worried about her equipments of production and that she can meet the demand of her own to some extent if she will make good and wise use of pulp and paper, investigate substitute raw materials and put the result into, practical use. The writer suggests that Japan should afforest rapid growing trees and utilize her rich production of rice and wheat straws.

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Splitter : In order to study the wood resistance against splitting, logs are split with a knife fitted to a hydraulic machine and the pressure given on each stage of the stroke is recorded. From this record, calculations are made on the driving power, the size of fly-wheel and the diameter of crank shaft.

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In Germany, the cement bag industry started about 40-50 years ago. The development of the same industry in the United States gave an impetus to the improvement of German cement bag manufacture. In the beginning, they were made from kraft paper imported from Northern Europe. The improvement of the cement bag industry of Germany owed much to Prof. Hertzberg. A great progress was made in the quality of cement bags when the paper was standardized. Owing to the control of importation and the increased demand of paper. bags, there was a shortage of home-made kraft paper and as a result, sulfite pulp had to be mixed to a great extent, causing deterioration in paper quality. The writer points out many difficulties thus overcomed in Germany and wants to encourage especially those engaged in the manufacture of cement bag paper in Japan.

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