抄録
The effects of choline and betaine on the regeneration of the visual purple were examined, employing frogs as the experimental animals.
The examinations were performed in two ways, namely, 1) simple comparisons of the retinal colours with Garten's table, and 2) the measurement of the visual purple concentration by means of a photoelectric spectrophotometer.
The results showed that choline and betaine were much stronger than pilocarpine in the augmentative effect on the visual purple regeneration.
