To read Oliver Sacks' 2001 recollection of his childhood years, his great appreciation for how the mind works was inspired by a relative, who he called Uncle Tungsten, that introduced him to the wonderful world of chemistry. Sacks, who recently died at the age of 82, never lost his passion for the periodic table, collecting an element for each year of his life. Thallium proved not so easy to acquire at age 81, and needed special housing. He worried how he was going to deal with Bismuth, but Plumbum, better known as Lead, is the final element in his periodic table . It would be easy to say that Dr. Sacks died with a heavy heart, but as he wrote in an essay several months back when he was told his condition was terminal, he accepted his condition, especially since he felt he had been given nine extra years after he was first diagnosed with an ocular melanoma. It's only fitting since many of the patients he shared with us through his fabulous books similar...