Quick Statistics
- First used: 1896
- Last used: 1980
- Storage: about 18 bytes (plus whatever's written on the card itself)
A used edge-notched card
This card is from the Herndon Dowling collection and describes a snake from Michigan.
A single unused card
This card is unused. It's pre-printed with what each hole or notch means. It is from the Herndon Dowling collection.
Stack of unused edge-notched cards
The clipped corner helped ensure you had all the cards facing the same direction.