You have to stir and may have to heat the water to get the salt to dissolve. Hot liquid and stirring with a raw shell egg involved turns into badly made poached eggs.
Besides throwing off the specific gravity, which is measured at standard temperature.
And it's not ppm. It's ounces per gallon. Is why I have cheap SALT (not mineral) blocks that weigh 50 lbs.
Did you know that roman soldiers were paid in salt originally? It's a precious substance, if you can't get it, and need it.
How much salt do you have in your house right now? How much do you need to live per year?
/johnny
http://www.ces.ncsu.edu/depts/poulsci/tech_manuals/gravity_determination.html
Who knew eggs were so complex? LOL.
Salt? A few thousand pounds. I own a plow truck - the stuff is everywhere.
Actually, I tried to reduce my salt holdings this year - but the weather did not cooperate. Only used up #900. Sigh.