1) Of the seven species of yeast tested, three which do not apparently yield ethyl alcohol are inherently more resistant than those which do. The growth habit on the copper-containing medium differs according to species.
2) The RNA which increases the viability of S, ellipsoideus in the copper medium, is contained only in the copper-resistant cells of the same species. It is extracted neither from resistant cells of other species so far tested, nor from nonresistant cells of S. ellipsoideus itself and some other species.

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1. In Hydrila the chloroplast of the leaf shrinks by dark-treatment, but does not disappear.
2. The addition of artificial hormone makes the chloroplast in the leaf shrink more than the control both in the light and in the dark owing to the accelerating effect of hormone on the consumption of nutrient for growth.
3. The degree of shrinkage of chloroplast in the leaf effected by hormone is proportional to the hormone concentration within the experienced range of 10^-8-10^-5.
4. The chloroplast number in unit area is inversely proportional to the hormone concentration 10^-8-10^-5.
5. When the chloroplast of the leaf which has shrunk by etiolation is exposed in the light it does not immediately recover its normal size but shrinks more for a while.
6. The nutrient supplied by the photosynthesis of the chlorophyll which has recovered from chlorosis after the reexposure in the sun causes the recovery of the normal size of chloroplasts.
7. The nutrient given in solution keeps chloroplast from shrinking and helps to maintain its size.
8. On the stem the shrinkage of chloroplast in chlorosis proceeds until the chloroplast vanishes.
9. The recovery of chlorosis in the stem by the exposure in the light, appears to be the recapitulation of the size of chloroplast.
10. The chloroplasts in the leaf and in the stem are divided in two types, that is, the true chloroplast type in the leaf and the amyloplast type in the stem.

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The chromosome numbers and morphologies were studied in 32 species of Japanese grasses, which belong to the genera Brachypodium, Agropyron, Bromus, Festuca, Eragrostis, Eleusine, .Muhlenbergia, Sporobolus, Stipa, Trisetum, Agrostis, Calamagrostis, Polypogon, Alopecurus, Digitaria, Setaria, Paspalum, Pennisetum, Cymbopogon, Eccoilopus, Microstegium, Hemarthria (Table 1). The taxonomic placing of the genus Brachypodium was considered, as well as the systematical relations between Trib. Agrostideae and Trib. Aveneae; Trib. Agrostideae and the genera Stipa, Muhlenbergia, etc. A karyotaxonomical point of view of the genus Digitaria was mentioned.
It is a pleasure to record here a debt of gratitude to Messrs. H. Kasaki, B. Sakai, and T. Takemaru for their kindness during the. course of the present investigations.

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1) Studies of geographical distribution of five karyotypes found in barley varieties, which previously reported by the present author (cf.Oinuma, I. IV, and V), were made in this paper using eighty-six strains of barley varieties.
2) Distribution of these karyotypes were shown in the table 2 and fig. 1. Judging from these results obtained in this paper, it is an actual fact that the districts extending from Hindu-Kush to European-Russia (exactly speaking they may probably limited rather to the former district) has all kinds of the karyotypes found in barley varieties. This fact agrees with the hypothesis of “Genzentrentheorie” of Vavilov's and also Takahashi's theory concerning with the differentiation of barleys. In fine, it becomes clear that the study of geographical distribution of karyotypes plays an important role in dissolving the evolution of the plants.

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It seems to be able to classify yeasts into two groups. The one, which includes Saccharomyces, Schizosaccharomyces and Zygosaccharomyces, cannot oxidize xylose and its endogenous respiration and glucose oxidation are strongly inhibited by cyanide. The other, which includes many other wild yeasts, can oxidize xylose and its endogenous respiration is rather stimulated by cyanide or azide, while its glucose oxidation is inhibited by cyanide in lesser extent than the former. Some of the yeasts tested, however, were found to have medium properties.

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I. During one month investigations were carried out for changes of the degrees of light-sensitivity (represented by germination) of tobacco seeds with the lapse of time of imbibition and the following results were obtained.
(1) In the case of “Daruma”. “Oo-Daruma”. “Hatano”. “Suifu” and “ Kokubu”. increases and decreases of their light sensitivity form repeating waves of 2 to 4 times with the lapse of time of imbibition (presoaking time). According to the degree of after-ripening of the tested seeds and the strains of them, there exist some differences in imbibiting time which both maximum and minimum values of light-sensitivity can be obtained. In the case of seeds after-ripened for 5 months, the largest light-sensitivity are obtained on the 3rd or 4th, 8th and 15th days of soaking, and completely after-ripened seeds show the largest increases of light-sensitivity on the 3rd, 5th and 10th days.
(2) However, light-sensitivity of the seeds of “Yellow” alone do not show repeating wave-like changes but form a gentle ascending and descending slope with the lapse of time of imbibition. This way of changing is the same as in seeds of certain other plants which has been observed by some investigators up to the present. The peak is on the 8th day of soaking, in freshly collected seeds, and 4th or 5th day, in completely after-ripened ones.
(3) Differences between higher points and lower points of the waves described in (1) set forth respectively different features according to the strain. “Daruma” exhibits the largest differences which is followed by “Suifu”. then “Hatano”. and “Kokubu”. that is to say, the last waves have the least uneveness. “Yellow” forms only one wave of a mountain shape as described in (2).
(4) If seeds were exposed to a large quantity of light such as 10⁴ MK-3min. (1, 800, 000 MKS), changes of light-sensitivity exhibit a simple form like “_??_” and no wavelike curves can be obtained.
II. One of the experiments of the present work in which seeds are given a very brief exposure to a very small quantity of light proved that “Yellow” is extremely light-sensitive. Because despite the fact that the values of the time and the light quantity of exposure were extraordinary small, however a considerable germination percentage could be obtained. Such a small figure was never experienced before.
(1) In the case of fully ripened seeds of “Yellow”. 75% of germination can be obtained by 1, 500 lux (MK)×one-ninetieth second and 54%, by 150 lux×one-ninetieth second, after 72hrs, of soaking, in other words, it can be obtained by a very brief exposure to Light in both cases, (The maximum percentage of germination of this strain of tobacco is 80 to 85)
(2) The seeds of “Yellow” which do not reach full-ripening showed 71.5%, 62.5% and 35.5% of germination by 1, 500 lux×one-ninetieth seconed, 200 lux×one-hundredth second and 200 lux ×one-threehundredth second respectively on the 8th day of soaking which is the peak day of light-sensitivity. (The maximum germination percentage of this strain is 70.)
Thus, even by an extraordinary short exposure to light, we can secure, in this kind, about half figures of the maximum germination percentage. In conclusion, the result showed that a very small dosage of Light promotes germination.

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1) Rapideco de la protoplasmofluo estis mezurata en polentubo. (tab. 1)
2) Fluo estas plej rapida ce 35-36°C, kaj haltas ce 47°C. (fig. 2)
3) Protoplasmo havadas fluecon ec kiam la fluo estas momento haltigita per premo de vitra pinglo (figs. 5, 7)
4) Per kirlado la fluo estas haltata en momento.
5) Disigital pecoj de protoplasmo fluadas dum la dauro de 30 horoj interne kaj externe de la tubo. (fig. 1; 6, 7)
6) En vivanta tubo, protoplasmofluo trapasas la plej prokisman vojon. (fig. 1; 3, 5)
7) Granoloj en vivanta protoplasmo de poleno ne faras Brawn-movadon.

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