Cream butter and add sugars and beaten eggs. Dissolve soda in the hot water and mix alternately with the flour sifted with salt, Lastly add the chopped nuts and the semi -sweet chocolate which has been cut in pieces the size of a pea. Flavor with the vanilla and drop half teaspoons on a greased cookie sheet. Bake 10 to 12 minutes in a 375 degree F oven. Makes 100 cookies.