Thin Slabs Of Ivory With Days Of The Week On The Top Found In My Closet. What Is This Thing?
Answer: Fabulous antique early Victorian chatelaine aide memoir from mid 1800s. Made of sheets of bone, it would have hung on a lady's chatalaine chain or been kept securely in her pocket and she would have used it to make note and appointments for the week to come. It has 6 pages for the days Monday to Saturday, of course a lady would never have made appointments on a Sunday
that's just CUM ! 
and to think all sorts of things such as this in our "drinking water"