it to the connecting wire. That was the job of the salt water, the other plate and the connecting wires above. One way of doing this is to press a metal mesh against the cuprous oxide (see diagram below.) Some sunlight will get through the holes in the mesh to the cuprous oxide and cause the electrons to move to the surface to the mesh. The mesh is conductive and will carry the electrons to the connecting wire. This will be less efficient though, since you are blocking some of the cuprous oxide with the mesh. Also, you will pick up only the electrons from the cuprous oxide that are near the mesh wires. Another possible way is to use a glass that has a transparent, electrically conductive coating and press this conductive side against the cuprous oxide (see diagram below.) Since the glass and its coating are both transparent, the sunlight will not be blocked. The coating may still cause some loss in transmission of sunlight, but it will still be better than the mesh approach. An example of this glass is the tin dioxide coated glass used in modern flat LCD computer screens. I haven't tried this method myself but if you do, please let me know how it works out. If you take a picture or video then I will include it here.