Don’t dispose of mercury if you have any! That stuff is pretty hard to come by, especially these days. Keep it safe, in plastic vessel (the heavy liquid can shatter glass containers if it is sloshing inside during transportation), possibly under a layer of water to keep the vapors down, well-sealed. Ideally, put the container into a bigger container with some mercury-absorbing material (zinc or copper powder or fillings, powdered sulfur, etc.). If it is sealed in glass (switches, etc.), keep it in there and package the thing to avoid breakage. Then you are on the safe side and all that remains is the mercury’s coolness factor.
People worked with this stuff for decades and survived. Many things aren’t as dangerous as they are said to be.
Dimethyl mercury, on the other hand, is something to run away from, screaming. Just something to keep things in perspective.
