Portable horizontal sundial 1700 - 1750

This portable horizontal sundial, made by French artisan Rousselle between 1700 and 1750, is a testament to the artistry and scientific knowledge of the era. The octagonal brass dial features intricate engravings, including Roman numerals, decorative flourishes, and the maker's signature. The sundial's gnomon, or shadow-casting rod, casts a shadow that aligns with the hours marked on the dial, allowing for accurate timekeeping based on the position of the sun. This small but precise instrument was a valued tool for travelers and scholars alike.