Horseshoe Magnet Diagram - Classic Magnetic Field Illustration #3280898 (License: Personal Use)

This black-and-white engraved illustration depicts a traditional U-shaped (horseshoe) magnet with two parallel rectangular pole pieces extending from the open ends. The top pole is marked with a cross symbol (+), indicating the north pole, while the lower pole has a small dash (-), denoting the south pole. The shading and hatching suggest depth and material layering, typical of 19th- or early 20th-century scientific diagrams.

Commonly used in educational materials, physics textbooks, and museum exhibits to explain magnetism fundamentals; matches user intent for historical scientific imagery, classroom resources, or STEM content creation.