1.Preheat oven to 350°F.
2.Mix butter, 1 1/2 cups sugar and eggs thoroughly in a large bowl.
3.Combine flour, cream of tartar, baking soda and salt in a separate bowl.
4.Blend dry ingredients into butter mixture.
5.Chill dough, and chill an ungreased cookie sheet for about 10-15 minutes in the fridge.
6.Meanwhile, mix 3 tablespoons sugar, and 3 teaspoons cinnamon in a small bowl.
7.Scoop 1 inch globs of dough into the sugar/ cinnamon mixture.
8.Coat by gently rolling balls of dough in the sugar mixture.
9.Place on chilled ungreased cookie sheet, and bake 10 minutes.
10.Remove from pan immediately.