| View Cart ⇗ | Info

“When an electromagnet is U-shaped, the coils around the two ends of the bent iron core are so wound that if the coil should be straightened either coil would appear as a continuation of the other, i.e., the current would circle around the core in the same direction in the two coils. Such magnets are often made by connecting an end of the core of one spool-shaped magnet, by a straight soft iron bar called a yoke.” — Avery, 1895


Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 473


TIFF (full resolution)

2400×2209, 1.5 MiB

Large GIF

1024×942, 201.6 KiB

Medium GIF

640×589, 104.0 KiB

Small GIF

320×294, 36.0 KiB