The Double Innervation of Caudal Melanophores in Fundulus.

A by-product of this research is the opening of a promising field of investigation of stability or.homogeneity of ozone in the stratosphere. In conclusion it is relevant to add that the success attained in depicting the ultra-violet solar spectral energy curve outside the earth's atmosphere, by means of the photoelectric cell and filters, indicates possibilities of obtaining, in a similar manner, the spectral energy distribution of stars, (particularly blue stars) to determine whether there is a continuous drop in intensity with decrease in wave-length, as observed on the sun. A large sized chromaluminized mirror would be required; but since a sharply defined stellar image is not required, the cost of such a mirror would be greatly reduced.