Ni provis nian norman projekciilon per la RAC disko, au tiel nomata Brita norma disko. Kaj ni konkludis ke la rezultato de nia antaiia eksperimento per kiu ni determinis nian norman kaj la rezultato de la nuna koincidas unu alian, generale.
Lau nia opinio, la kondfeo de provo per la disko estas tro severa por praktiko, tamen la persona eraro estas tre granda. La kialo povas esti ke la korek torimedo estas nesufiea, kvankam simpla. Oni bezonas pluan studon en tiu ci linio.
La “largeco de lumfasko” mezurata per la disko evidente ne estas sama je la ordinara “largeco” difinita de la “10%-lego”. Tial ni proponas nomi tiun “limo de flanka ilumino” anstatail la “largeco”, por diferencigi gin el ci tiu.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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The present paper outlines the experiments on the measurement of daylight illumination by the use of a photoelectric cell and an adjustable model room; especially of diffused daylight illumination produced by the interreflection of all the interior surfaces of the room, the reflection factor being kept constant. The results of these experiments are compared with those of the theoretical calculations made under simple assumptions.
The adjustable model room, measurinioocmcm ioocmcm iocmcm at largest, is so constructed that the size and position of window and the size of the room itself can be altered with a 10-cm step. The light source is an artificial light box capable of supplying lights of nearly perfect diffusion and constant brightness. From the experimental results, the following conclusions are reached:
(1) the direct daylight roof-ratio can be predetermined from the theoretical formula for practical purposes, (2) the diffused illumination is uniformly distributed all over the entire working plane, (3) the diffused illumination is independent of the window position, (4) the diffused illumination is proportional to the window area, and (5) the diffused illumination is inversely proportional to the total area of interior surfaces of the room, the reflection factor being kept constant.
The further experiments are at present continued Nvith the model rooms with various reflection factors.
The same paper in full will be presented at I. C. I., 1931.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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