Percival Lowell, Age 61 Frontispiece

Percival Lowell and His Biographer Facing Page 4

Percival Lowell and the Members of the Korean Embassy 16

Observing and Drawing the Canals of Mars 116

Gaps in the Asteroids and the Rings of Saturn 166

Predicted and Actual Orbits of Pluto Page 199

BIOGRAPHY OF
PERCIVAL LOWELL