This pamphlet by Milbourne Christopher has 50 ideas for a thumbtip, some familiar, some not. A good assortment of effects.

Introduction by Hen Fetsch
Thumb Tip Magic
Burning a Handkerchief
Making Money
Ribbons From Nowhere
Burning a Napkin
Burning a Tablecloth
Fire-Proof Thumb
Conjuring Up Candy
Living or Dead
Cards Controlled
Vanishing a Dime
Indestructible Match
Spirit Rapping Hand
Thumb Tie with Rubber Bands
Chapman's Taped Thumbs
Dollar in Banana
Bill in Soft Roll
Bill in Hard Crust Roll
Reimer's Ribbon Cut
The Severed String
Spirit Knots
The Mysterious Cord
Cigarette to String
Silken Dollars
Inflated Money
Waterproof Greenback
Waterproof Variation
Burning a Dollar
Spots that Pass
Bill In Nested Envelope
Solid Sugar
Silk Switch
Quick Change
Bank Night
Annemann Move
The Vanishing Card
The Vanishing Cigarette
Full-size Cigarette Vanish
Flash Tip
Silk Prediction
Confetti to Silk
Allen's Tie Trick
A Tannen Tip
Knots Untied
The Cut Restored
Bill in Purse
Amazing Prediction
Thumb Stretching
Bill in Shot Glass
Bill in Egg
Seated Envelope Reading
Recommended Tricks and Books
Donated by Eddie Goldstein