...distances from the sun, their diameters and masses. More than thirty years ago, Professor Kirk wood supposed that he had discovered the relation in the...which is still obscure, seem to affect the different methods of solution. Thus, while experiments upon the velocity of light and heliometric measurements...

...the planets, in the fact that there is very possibly some connection between these periods, on theone hand, and, on the other, the planets' distances from...system. The great problem of the absolute dimensions of onr system is, of course, commanded by the special problem of the solar parallax ; and this remains...

...distances from the Sun, their diameters and masses. More than thirty years ago, Professor KIRK WOOD supposed that he had discovered the relation in the...the origin and development of the planetary system. PENDING 1'KOBLEMS OF ABTJtOJfOXY. 263 system is, of course, commanded by the special problem of the...

...and establishing it were then, however, , insufficient, and still remain so, leaving far too man}' of the data uncertain and arbitrary. Could such a...which is still obscure, seem to affect the different methods of solution. Thus, while experiments upon the velocity of light and heliometric measurements...

...insufficient, and still remain so, leaving too many of the data uncertain and arbitrary). Could such relation be discovered, it could hardly fail to have...respect to theories of the origin and development of the solar system." . . . I do not know of the " analogy," but have seen in the " Observatory " for 1880...