[LegendHasIt]

Thanks for the info Kart...

It isn't free, but in the same vein: every serious prepper should have one of these too: Henleys Book of Formulas

You can sometimes find them in the discount bin at a Brick & Mortar bookstore for a buck or two.

[JustaDumbBlonde]

Thanks ... I just purchased the book on Amazon. Sounds like a book that I’ll enjoy.