1) The influence of the sun-light on the eggs, larvae and fry of Oncorhynchus masou (Brevoort) are studied.
2) The intensity of the sun-light may be effected already upon their chemical compositions in the fry through the oval and larval stages. The fish fed in the lighter place (in the open air out of the hatchery), as compared with the darker place (in faint light inside of the house), are rich in solids, inorganic matters (especially calcium) and nitrogen and are poor in fatty substances.
3) There occur the considarable differenciation in weights of the fish in a group fed on the same diet regardless of the light. And the larger ones are in generally rich in solids especially fatty substances.
4) From these facts, it is concluded as follows:- This species of fishes Oncorkynchus masou (Brevoort) may be already fond of the light place on the youngest days. The fish therefore fed in the open air assimilates the more calcium and nitrogen while that in doors accumulates surplus bodily fats, -these results are the similar to the cases in the preceding report on fasting of salmons fry Oncorlvynclaus keta (Walbaum⁽¹⁾) in light and darkness.- and the larger ones in a group accumulate in generally the more debot fats without regard of the qauntity of the light.

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(1) The effects of same environmental conditions on the respiratory process in the silk worm's pupa and larva at 5th period were studied.
(2) The effects of temperature, in the rang 14_??_32°C, and of moisture in the range 60_??_100%, can be described in terms of the following experimental equations.
y=kt^p
y=km^-p
in which y is the amount of carbon dioxide produced, t is the temperature, m is the moisture, k and p are the constant.
(3) The upper critical temperature of the respiratory process is about 33_??_34°C, and its lower critical temperature is probably about 7_??_8°C.
(4) When there is the same temperature or moisture during a continuous period, the higher the temperature or the greater the moisture, the more rapid is the decrease in the production of carbon dioxide.
(5) Under the condition of no air current carbon dioxide production is very much diminished and it is increased up to 0.1cm/sec. in proportion to the velocity of the air current.

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The distribution of phosphorus in cow's milk (milk powder) has been determined and the existence of much phosphorus in the fraction of phosphatides has been proved.
The experimental procedure has been schemed to isolate the individual phosphatide, assuming that all of fats and lipoids which were found in various animal tissues and organs are also present in cow's milk.

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