Until very recently, the heavenly bodies have been investigated only with reference to their position and their laws of motion, and a quarter of a century ago astronomy was little more than celestial topography.

Madam: If you discover any more comets, can you not wait until they are announced by the proper authorities?

I had planned to accomplish something considerable, and this is the end.

Until very recently, the heavenly bodies have been investigated only with reference to their position and their laws of motion, and a quarter of a century ago astronomy was little more than celestial topography.