Comic Title: Flash #40
Publisher: DC (DC Comics Inc.)
Address: 666 Fifth Avenue, New York, NY
Cover Date: July 1990
On Sale Date: May 15, 1990 Shipping Date May 15, 1990
Source: Previews, #15

Shipping Date May 15, 1990
Source: Amazing Heroes, #179

Shipping Date May 17, 1990
Source: Advance Comics, #17

Copyright Date May 15, 1990
Source: Library of Congress, Copyright Office 1990

Frequency: Monthly
Cover Price: $1.00
Page Count: 32
Editor: Brian Michael Augustyn

Title: "Philosopher's Stone"
Pages: 22

Feature(s):
Flash (Wally West Post-Crisis)

Writer: William Messner-Loebs
Penciller: Gregory B. LaRocque
Inker: Jose F. Marzan, Jr.
Letterer: Timothy Harkins
Colorist: Glenn Whitmore

Feature Character(s)

• Flash (last appearance in Justice League Europe #19; next appearance in Flash Special #1)

Supporting Character(s)

• Linda Park (last appearance in Flash #39; next appearance in Flash #41)
• Tina McGee (last appearance in Flash #38; next appearance in Flash #41)
• Jerry McGree (last appearance in Flash #38; next appearance in Flash #42)
• Mason Trollbridge (last appearance in Flash #38; next appearance in Flash #43)

Villain(s)

• Doctor Alchemy (last appearance in Manhunter #7; next appearance in Flash #41)
• Alvin Desmond (Dr. Alchemy's psychic twin; first post-Crisis appearance; next appearance in Flash #41)

Other Character(s)

• Seamus O'Relkig (last appearance in Flash #39; next appearance in Flash #41)
• Easy Martin (a scientist; next appearance in Flash #42)
• Dr. Camper (researchers; next appearance in Flash #42)
• Dr. Byron (an adversary of Dr. Camper; next appearance in Flash #42)
• Dr. Marlena Tims (a researcher; first name not given in this story; next appearance in Flash #42)

Synopsis:
Wally brings Linda Park to Albert Desmond in hopes of separating her from the spirit of Seamus which possesses her. Albert agrees to help, but then he attacks in the guise of Dr. Alchemy. The Flash defeats him, after realizing that Desmond is actual Alvin, Albert's psychic twin. After the battle, the Flash finds the real Albert and releases him.