James, Stewart: Nullifactor ©1950 (circa) Stewart James Softcover, saddle-stitched, 5.5x8.5", 8 pages

Image courtesy eBay seller JayAndLefty

Comments: Printed by Francis Haxton. The nullifactor is a series of card effects based on Henry J. Christ Force Move.

Contents (from book):

2 Preface (Francis Haxton)

3 The Nullifactor
3 The Move: based on Henry J. Christ's Force, but using ordinary cards
3 To Perform the Move
3 Forward Move: Nullifactor shift
4 Top Card Cover Move
4 Super Move

4 Spelling Location
5 Coincidence Upon Coincidence
5 Ace Assembly
5 Card and Number Prediction
6 Nullifactor Slate Mystery
6 To Force Two Cards
7 The Square Deal Location
8 Miracle Location