pyrex distilling flask are placed 150 g.
"Organic-Syntheses"
Conant, James Bryant
A single pyrex flask can be used for only three or four runs.
"Organic-Syntheses"
Conant, James Bryant
He is the chief technician of the pyrex Glass Works at Corning, New Jersey.
"Astounding Stories of Super-Science, December 1930"
Various