Artemus Ward used to say that, while there were many things in the science of astronomy hard to be understood, there was one fact which entirely puzzled him. He could partly perceive how we 'weigh the sun,' and ascertain the component elements of the heavenly bodies, by the aid of spectrum analysis. 'But what beats me about the stars,' he observed plaintively, 'is how we come to know their names.' This question, or rather the somewhat similar question, 'How did the constellations come by their very peculiar names?' has puzzled Professor Pritchard and other astronomers more serious than Artemus Ward. Why is a group of stars called the Bear, or the Swan, or the Twins, or named after the Pleiades, the fair daughters of the Giant Atlas? {121} These are difficulties that meet even children when they examine a 'celestial globe.' There they find the figure of a bear, traced out with lines in the intervals between the stars of the constellations, while a very imposing giant is so drawn that Orion's belt just fits his waist. But when he comes to look at the heavens, the infant speculator sees no sort of likeness to a bear in the stars, nor anything at all resembling a giant in the neighbourhood of Orion. The most eccentric modern fancy which can detect what shapes it will in clouds, is unable to find any likeness to human or animal forms in the stars, and yet we call a great many of the stars by the names of men and beasts and gods. Some resemblance to terrestrial things, it is true, everyone can behold in the heavens. Corona, for example, is like a crown, or, as the Australian black fellows know, it is like a boomerang, and we can understand why they give it the name of that curious curved missile. The Milky Way, again, does resemble a path in the sky; our English ancestors called it Watling Street--the path of the Watlings, mythical giants--and Bushmen in Africa and Red Men in North America name it the 'ashen path,' or 'the path of souls.' The ashes of the path, of course, are supposed to be hot and glowing, not dead and black like the ash-paths of modern running-grounds. Other and more recent names for certain constellations are also intelligible. In Homer's time the Greeks had two names for the Great Bear; they called it the Bear, or the Wain: and a certain fanciful likeness to a wain may be made out, though no resemblance to a bear is manifest. In the United States the same constellation is popularly styled the Dipper, and every one may observe the likeness to a dipper or toddy-ladle.