Comic Title: Adventure Comics #279
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: December 1960
On Sale Date: October 27, 1960 Copyright Date October 27, 1960
Source: Library of Congress, Periodicals 1960

Frequency: Monthly
Cover Price: $0.10
Page Count: 32
Editor: Mort Weisinger

Title: "Superboy Visits the 50th Century"
Pages: 12

Feature(s):
Superboy (of Earth-1)

Writer: Otto Binder
Penciller: Curt Swan
Inker: George Klein

Reprinted In:
Superboy #136 (1967)
Best of DC #36 (1983)

Feature Character(s)

• Superboy (last appearance in Superboy #85; next appearance in Superboy #86)

Supporting Character(s)

• Lana Lang (last appearance in Superboy #85; next appearance in Superboy #86)
• Mrs. Lang (last appearance in Superboy #63; next appearance in Adventure Comics #282)

Other Character(s)

• Professor Thadee Lang and his daughter Lita (descendants of Lana Lang; no further appearances)
• The 50th century police (no further appearances)
• Thorz (a leader of 50th century Earth; no further appearances)
• An unnamed doctor (no further appearances)

Comments:
Superboy discovers White Kryptonite which is deadly to all plant life in this story.

Synopsis:
Superboy is accidentally brought to the 50th century in an experiment by Lana Lang’s descendant, Professor Thadee Lang. In this time period, people believe that Superboy was a myth and since no records from that time period survived, no proof exists otherwise. Professor Lang and his daughter Lita are the only ones who believe Superboy was real. The professor is injured however and can not prove that Superboy was pulled from the past.

The authorities plan to deport Superboy, believing him a stowaway on an alien ship. Superboy tries to prove his existance by demonstrating his powers, but each power can be duplicated by 50th century inventions.

An alien ship crashes which releases a spore-like vegetation which grows rapidly. The 50th century technology is helpless against it. Superboy makes a discovery in a museum that may help. He uses a white mineral to destroy the alien plant. The mineral is White Kryptonite, something Superboy has never seen before. It has the property to destroy all plant life nearby. The existance of Kryptonite proves that Krypton existed, and the people realize that Superboy is real. He then returns to his own time.