All Stories

In Various Science Fields

New Machine for Molding Cast Iron

Parrot Fever Work to Be Moved

Low Voltage Dangerous

Magnetic Hardening

Fencing

Nature Ramblings: Piscine Hitch-Hiker

First Glances at New Books

Front Matter

Black as Coal, Dense as Zinc

The Sun’s New Trans-Neptunian Planet

Astronomers Acclaim New Planet

Science News-Letter | March 22, 1930 — The report from Flagstaff of the discovery of a faint, slow-moving object which can most reasonably be interpreted as a ninth major planet of the solar system again emphasizes man's ability to see beyond his power of vision and to grasp what lies beyond his reach.