THE BROCKEN, ETC. 268
BY CAMILLE FLAMMARION.

THE PLANET VENUS 282
BY AGNES M. CLERKE.

THE STARS 296
BY SIR R.S. BALL.

RAIN AND SNOW 342
BY JOHN TYNDALL.

THE ORGANIC WORLD 357
BY ST. GEORGE MIVART.

INHABITANTS OF MY POOL 366
BY ARABELLA B. BUCKLEY.

BIOGRAPHICAL NOTES. 387

SUGGESTIONS FOR SUPPLEMENTARY
READING. 389


NOTE.

The publishers' acknowledgments are due to Messrs. Houghton, Mifflin &
Co., for permission to use "America and the Old World," by L. Agassiz;
to Messrs. D.C. Heath & Co. for permission to use "Some Records of the
Rocks," by Professor N.S. Shaler; and to Professor E.S. Holden for