Paul Revere's Bell Formula

Paul revere's formula for casting large bells

Paul Revere's formula for casting bells involved a mixture of horse dung, sand, and clay. He also used tallow and wax.
[We believe a bit of tin was used to help tune the bell]*

Steps for casting a bell

1. Pack mud into a mold in the shape of the bell's interior

2. Apply tallow and wax to the exterior

3. Cover with another layer of mud

4. Heat from below to melt the wax and harden the mud

5. Pour molten bronze into the mold

6. Cool the bronze

7. Remove the bell from the mold

8. Clean, polish, and tune the bell by hand

Bell-making process
Revere learned how to make the mud from Aaron Hobart, who was one of the few people in America who knew how to cast bells. Revere and his sons cast hundreds of bells between 1792 and 1828. The bells were often inscribed with the message "THE LIVING TO THE CHURCH I CALL AND TO THE GRAVE I SUMMON ALL".

Revere's foundry was located in Boston's North End.

[Provided by Google's Gemini AI}
*Searching for the source that suggested Revere used tin; his innovation to the process.