In these days the man of science holds an enviable position. His outlook on the world in general, so far as his scientific point of view is concerned, is not dimmed by the terrors of war, by changing political trends, nor by recessions of the business world. True, all of these may limit his productivity or actually interfere with his work. Nevertheless, he has a grasp on the laws of the universe which are unaffected by any of these changing conditions. He needs no appeal to a court, for the laws with which he deals are the eternal verities. So in the shifting sands of the human world and the ebb and flow of man-made tides he may feel sure of the ground on which his science is based, knowing that its laws will be operating when all these other temporary troubles are long forgotten.
To the astronomer who deals . . .