Jim Williams used to lick solder as he was soldering as did other old-timers. Another observed behavior was licking the thumb and wiping the joint immediately a

Jim Williams used to lick solder as he was soldering as did other old-timers. Another observed behavior was licking the thumb and wiping the joint immediately after soldering. Later he developed Parkinson's disease (probably related [1]) and died of a stroke. [1] https://www.ncbi.nlm.nih.gov/pubmed/20807691 https://www.ncbi.nlm.nih.gov/pubmed/20807691