Effect of Light on Uptake of Water by Frogs Injected with Posterior Pituitary Extract

Conclusion

The greater uptake of water by frogs injected with extract of the posterior hypophysis in the dark room observed by Boyd and Brown′ has been shown due to the decreased circulation of air in the unventilated dark room rather than to darkness. There is no evidence to date that light has any effect upon this property of posterior pituitary extracts.