Printers' Ink, Oct 18, 1923 (Vol. 125, No. 3): report of Claude C. Hopkins' critical talk on copy
The pattern
This still sits in the public-domain pool. No pattern name yet.
Why it works
Reporting Claude Hopkins' address on scientific advertising testing methods. Demonstrating that split-run tests prove copy value before national rollout saves corporations millions in wasted ad spend.
Steal this when
When establishing small-scale split-run test protocols before authorizing large national advertising investments.