By means of Wheatstone bridge, electric resistance of fish muscles was determined for both direct and 1000 cycled alternate currents. Both specific and contact resistances were calculated graphically as shown in Figs. 3 and 4. Figs. 1 and 2 show the method adopted, while the results are given in Tables 1 to 5.

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1) 新潟縣岩の原葡萄園産の葡萄品種中在來種29種新品種35種に就き比較醸造を行ひたり
2) 各品種に就き果汁及び生成酒の化學的組成並びに收量,〓酒の結果を明示せり.
1. 本年度使用葡萄にありて糖分と酸との比は次の如し.
16以下 16～29 29以上 試驗数
在來種 6 18 7 31
新品種 6 34 7 47
合計 12 52 14 78
前々年度,前年度に比し糖分比率16以下のもの少し.
2.赤酒の色調は在來種に比し新品種は優秀なり.
3. 香味の點は尚研究を要する點あり.
4. 酒量は品種に依り差異あり.
3) Ringelnを行ひたるものと行はざるものとの果汁の成分を比較せり.
本實験を行ふに常り御指導を賜はりし坂口謹一郎先生,種々御便宜を賜はりし,壽屋社長鳥井信次郎氏,佐藤喜吉博士,寺地卓二氏に深甚の謝意を表し,〓酒を行ふに當り,山田正一博士,朝井勇宣先生,先生,森貞信氏,西村克己氏,尚分析其の他種々御注意を下さつた井上辰一郎氏に謝意を表す.

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This preliminary report deals with a few methods of inducing fiowering of mulberry plants in the sum mer-autumn season . Generally speaking, mulberry flowers, in the vicinity of Tokyo, are in bloom late spring, however the following four treatments showed to be successful methods in order to induce fiowering in the summer autumn season. 1 . One-year-old cut shoots severed off their crown in wintet or early spring, are stoted in a cool cellar at 5'C . These refrigerated shoots are taken out and cuttings are inserted late summer . 2. The hardened shoots of, the current years growth are severed off their crown at the suitable time (perhaps after August) and stored in a cool cellar at 5'C for about a month . These refrigerated shoots are taken out and cuttirigs are inserted . 3 . The current year's shoots of mulberry trees in the field are pruned late summer. 4 . The current year's shoots of mulberry cuttings in pots, to which the same treatment as the first case had been given early spring and has grown, are pruned late summer .

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浅見輿七博士がMalus baccataの新変種var. nikkoensisとして記載したニッコウオオズミと思われる植物を,日光中禅寺湖畔において再発見した.この植物に関して,原記載においてエゾノコリンゴ(M. baccata var. mandshurica)との識別形質とされた萼裂片の形態および葉の鋸歯の形状を中心に再検討した結果,独立な変種としては扱えず,エゾノコリンゴに含めるべきであると結論した.また,本州におけるエゾノコリンゴの分布についても検討し,日光の個体群は北東北,中部いずれの分布域からも離れた隔離個体群であることが判明した.この集団の現存株数は60株ほどであり,実生・稚樹等の更新も殆ど行われておらず,今後の存続が懸念される.

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組合せにより多少趣を異にしてゐるが總括して大體の傾向を伺ふに, 茄子のヘテローシスは花數及果數に現れひいては最後の總收量に最も強く現れて來る。
正常花歩合或ひはセット歩合, 並びに果實の生長速度は兩親の中間を取りヘテローシスの現れ方は一般に微弱である。然し乍ら總收量に現はれるヘテローシスの特に強い組合せ (例へば魚沼巾着×眞黒, 魚沼巾着×折戸) に於てはセット歩合及果實の生長速度の相に於ても相當のヘテローシスが認められた。(第2圖參照)

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この報告はカラマツの花芽分化期を明らかにするために,長野県西筑摩郡福島町附近の,海抜980mと1,440mの2地点より,各3個体の木を選び調査したものであつて,その概要は次の通りである。
1. 花芽分化期は7月中旬より,下旬にわたる間である。
2. 海抜980mと1,440mの2地点の間には分化期に差異は見られない。

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1. Experiments were carried out in 1955 in order to study the effects of the concentration of NaCl in the culture solution on the growth, flowering, fruit bearing and chemical composition of the egg-plant, in sand culture under the glasshouse condition.
HOAGLAND's nutrient solution was used as the basic solution, and in the NaCl treatment, the concentrations of Nacl added ranged between 2, 000 and 14, 000ppm at intervals of 2, 000ppm. “Shinkuro” variety was sown on Feb. 1 in the sand seed bed, and young plants were transfered on May 7 to the washed river sand in 5-gallon glazed crocks. Nacl treatments were initiated on May 23 and continued till July 23.
2. The growth of plants was reduced almost in inverse proportion to the increasing concentration of NaCI, bu tno other specific symptoms appeared in the NaCl treatments.
3. No harmful effects of NaCl treatments on the fertility of pollen and its rate of germination were observed.
4. Both the number of flowers and the rate of the occurrence of perfect (long-styled) flowers decreased with the increase of NaCl concentration, but the influence of NaCl on the rate of fruit bearing was not evident.
5. With the increase of NaCl, the yield of fruits was reduced markedly, while the quality of fruits and the seed set appeared not to be affected.
6. Leaf analyses gave the following results. The contents of both Na and Cl increased almost in proportion to the concentration of NaCl in the solution, but Cl accumulated at the higher rate than Na. With the increasing concentration of NaCl. the contents of N and P increased slightly, while Mg and Ca, especially the latter, decreased markedly. The content of K showed the peak at 4, 000ppm of Nacl. Carbohydrates decreased with the increase of NaCl.

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Some leading Kaki varieties, especially “Fuyu”, have no male flower, and rarely set by parthenocarpy. To ensure the fruit set of such varieties, hani pollination method is recom-mended in Japan. This experiment was perfomed at Okitsu Hort. Exp. Sta. to ascertain the most effective method of hand pollination.
1. Before the male flowers open, the branches must be protected by paper bags, lest pollen grains shoud be dispersed.
2. The time when petals and anthers open has varied with varieties of the trees and with climatic conditions. Almost all flowers have opened in the morning, when it was fine wea her and the anthesis took immediately after that.
3. Without any paper bag protection, we can gather pollens easily, as followes: Gather the buds which are expected to open next morning, in the evening of previous day, when they do not bloom at all and preserve them next room. Anthesis will occur at about ten o'clock in the next morning.
4. The fertilizing, ability of the pollen grains, gathered as mentioned above, was examined by means of germination test and pollination test, and proved to be complete. Stored pollens holded practical ability within about five days in room temperature, while lower temperature (_??_°C) and dry condition were preferable, and higher temperature (30°C) was injurious.
5. Two hand pollination methods prevailing in Japan were compared in this study: One is to pollinize by means of writing brush with previously gathered pollens and other to pat the female flowers with male flowers of which petals are removed previously.
6. Pollen quantities were compared among several varieties. “Zenjimaru” had most profuse pollen per flowers.
7. In “Fuyu” variety more than 95 per cent of flowers has set by hand pollination un_??_il the color of petals changed to brown from cream-colored, that could be easily discriminative.

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1. 昭和24年興津において9年生柿樹 (次郎) の解体調査を行い各部の全重量及び新成量を測定し, 且つ各部についてN, P₂O₅, K₂O の3成分の分析を行い, 反当養分吸収量の算出を行つた。そして枝幹及び根部については, 皮, 材両部を新旧に分ち其の新成量を実測した。
2. 各部の乾物重は, 葉3.96kg, 果実5.06kg, 1年生枝1.13kg, 枝幹13.29kg, 根部10.56kg, 細根0.59kg, 計34.59kgであつた。そして新成量は, 枝幹及び根部では夫々4.19kg, 3.11kgであり之に果実, 葉, 1年生枝, 細根の全量(新成量)を加え計18.04kgである。
3. 全重量に対し新成量は52%を示し又, 新成量中葉, 果実, 1年生枝, 細根の合計は約6割を占めている。
4 各部の分析成績はN, P₂O₅, K₂O共に1年生枝が最も高い値を示し, 根部では大根が低く, 細い根が高い傾向を示した。果実の分析では何れの部分もNに比しK₂Oの含量が高かつた。
5. 1樹中に含有される肥料成分の全量はN 323.33g, P₂O₅ 96.40g, K₂O 251.39gで, その中新成部に含有される量はN 213.63g, P₂O₅ 57.61g, K₂O 183.15gであつた。葉, 果実, 1年生枝, 細根中の全量は新成部全量に対しNは7割, P₂O₅は6.2割, K₂Oは7.9割を占めていた。
6. 新成部中に含有される肥料成分を吸収量と見做し反当40本植, 反当収量380貫として反当吸収量を算出するとN 8.55kg(2.28貫), P₂O₅ 2.30kg(0.61貫), K₂O 7.33kg(1.95貫)となる。

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