1. A copper spool on which will be wound about six layers of 0.005" diameter pure copper wire so that each wire is in contact with six others (except for those on the surface).

2. A controlled atmosphere furnace for annealing the Cu spools. To prevent oxidation, you should flow H₂ throughout the anneal. Non-explosive forming gas compositions (10% H₂, balance N₂) are adequate to prevent oxidation.

3. A vacuum pump and vacuum dessicator.

4. A saw capable of cutting the spools in half, and standard metallographic polishing equipment.

5. An optical microscope, to observed the results.