The authors developed two coil spring type sugar cane stripping machines and the field performance tests were carried out.
A-type machine has three swinging coil spring stripping rolls, while B-type machine has three rubber fixed coil spring stripping rolls. The results obtained were as follows:
1) The stripping performance of A-type was; detrash percent 91.6-97.2%, trash percent 0.9-0.8%, cane loss 1.2-3.2% and working efficiency 714-1148kg/man-hr. The stripping performance of B-type was; 92.0-98.5%, 0.9-0.5%, 2.2-7.0%, 752-1143kg/man-hr.
2) Detrash percent and trash percent of A-type were inferior slightly compared with B-type, while cane loss of A-type was one halffold compared with B-type. Working efficiency was similar both two types.
3) The stalk damage was not observed both two types in any case, however, the durability of stripping materials of A-type (12 hours) was excellent compared with B-type (2 hours), because B-type coil spring was attached fixedly to rubber base of the roll. A-type machine was more practical.
4) The suitable revolution per minute of stripping roll and feeding roll of A-type leaf-stripping machine was 450-650rpm (9.42-13.61m/sec) and 25-35rpm (0.21-0.29m/sec).

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生産施設内外の空気分布, すなわち空気の流動とそれに伴う熱, 物質の拡散現象を解明することが研究の最終的な目的である。このために, 測定が困難な空気分布の各種要素を理論的に予測する方法の確立を図った。放射による熱輸送は考慮せずに, 施設内閉鎖空間において, 熱的境界条件のみにより起る熱対流 (自然対流) 現象を, 流体の基礎方程式である Navier-Stokes の運動方程式とエネルギー方程式, 水蒸気拡散方程式を組み合せて, 同時に解を求める試みを行なった。これらの偏微分方程式は, 非線型的性質を持つため, 高いグラスホッフ数まで, 安定して解くことが困難ときれていたが, 実施設で予想される10⁸オーダーの値まで, 風上差分スキームと, S. O. R法により, 次差分近似でも計算できることを明らかにした。この方法により, 床面及び壁面の各種の境界温度分布に対する空気分布 (渦度, 速度, 温度, 湿度) の関係が明確になった。また模型実験により求めた温度分布から, 他の要因を予測し, 対流現象と, それによる熱輸送に多少の知見を得ることが出来た。また, これらの方法を強制対流に対して適用するための方法についても言及した。

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To make clear the condition of thermal environments of the monitor-roof dairy barn in mild climate, air temperature and humidity, temperatures on the roof and under the stall were meastred.
The results obtained from this study were as follows:
(1) When the maximum outside tempeature of one summer day was 27.2°C, the maximum inside temperature was 27.7°C. It is considered to be due to ventilation effect of the open space of monitor roof and thermal effect of the roof insulation.
(2) The inside relative humidity during the night in summer was nearly 100%. This seems to be influenced by outside ani humidity.
(3) The mean surface temperature on the stall in a day was approximately 26.3°C in summer and 18.4°C in winter. And there were no differences in the mean temperatures between the insulation stalls and the normal stalls.

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Dairy and Beef manure samples of various conditions were analyzed to determine their specific gravity, substantial density and void ratio.
The important conclusions which may be drown from this experiment are summarized as follows.
(1) There was no significant difference in the values of specific gravity between raw dairy and beef manure. The mean value ranged between 1.4 and 1.6.
(2) The specificg ravity of composting of cattle manure was slightly larger than that of fresh manure and the mean value was 1.6.
(3) In the process of aerobic composting the apparent specific gravity (Gam) of loosely filled was the function of moisture content (m) and could be expressed as following equation.
Gam (m)=0.00023m²-0.00870m+0.31162
(4) The results revealed that the specific gravity should be applicable to estimate void ratio and to measure specific heat.

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