From the collection of a physics professor at William and Mary
The spinning object is called Barlow's Wheel or, in French, "Roue de Barlow" It is probably the earliest example of an electric motor. A puddle of mercury at the lowest point of the wheel completes the circuit through one spoke at a time. The flat horseshoe magnet provides the magnetic (V X B) force. I think it is about 1870.
Statistics
Place: 60 out of 184 Avg (all users): 5.7602 Avg (commenters): 7.5000 Avg (participants): 5.6528 Avg (non-participants): 5.8384 Views since voting: 2873 Views during voting: 280 Votes: 171 Comments: 10 Favorites: 0
Wonderful shadow. Very interesting and intriguing object. The surface is a little buckled so it's a little distracting, as are the creases at the curved edge.
You have managed to avoid what a lot of the other shots in this challenge have suffered from and that is ending up with a photo which simply documents the item. You have a great use of shadow and lighting here, which compliment what is already an interesting (and unusual) object. I don't know what this is, but I can only assume it's part of some light experiment. 8 from me.
Add photograph to your favorites
Add photographer to your favorites
Photographer found comment helpful.
