The experimental data obtained above as to the effect of hydrostatic pressure on the F bands produced in LiF, KCl and KBr by the exposure to RaBr₂ can be summarized as follows:(1) The peaks of the F bands shift to the short wavelengths and are evenly broadened by the hydrostatic pressure.
(2) The measured shifts increase with increasing pressure in the order, LiF<KBr<KCl.
(3) The spontaneous bleaching decreases with increasing pressure.
(4) The peak wavelengths of the F bands in the specimens colored after compressing coincide with those in the specimens compressed after coloring.
The detail of the experimental data not only of LiF, KCl and KBr, but also of other alkali halides, and the discussion of the relation between the data and the plastic deformation or the physical properties which express the strength of the crystals will be reported in The Review of Physical Chemistry of Japan.
The authors are indebted to the Department of Education for the Grant to the Scientific Research.

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i) In Nagano and Yamagata prefectures a disease of hop has occurred in the last few years which is different from the usual Downy Mildew or the Crown Call disease. It was observed from the physiological and pathological points of view.
ii) Considerable degeneration and diminution of the vessels take place in a somewhat lower part of the diseased shoot of the “Witches'-broom” type and “Whip-shaped” materials. The vessels of such materials were often plugged with some mucous substance.
iii) Rod bacterium-like minute bodies were observed in some of the plugged vessels, and in the intercellular spaces of the diseased tissues.
iv) Several strains of bacteria were isolated from “Witches'-broom” type materials.
v) Two positive results were obtained in the preliminary inoculation tests with one of the strains of the isolated bacteria.

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The electrical responses of single hair cells of the ear of fish were recorded by means of an intracellular microelectrode.
1) DC potential between the peri- and the endolymph measured. 5-7mV, the latter being always positive in reference to the former.
2) The resting potential of the hair cells in ampullae was 10- 12mV, while that in the utricule was 8-10mV.
3) Responses of those cells in ampullae to rotatory stimuli were reverse to each other, depending on the direction of rotation.In the horizontal canal the ampullopetal acceleration produced a depolarisation and the deceleration a repolarisation and, if any, , hyperpolarisation, whereas the ampullofugal acceleration produced a hyperpolarisation and the deceleration a depolarisation.In the vertical canals, both anterior and posterior, just the reverse responses were observed.The validity of Ewald's old hypothesis was identified. The ampulla was also responsive to the linear movement.
4) Responses of hair cells of the utricule were substantially not so much different from those of the ampulla. They were very remarkable to the linear movement but the utricule was still responsive to the rotation.
5) All these responses have never shown the overshoot.

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