Remove from heat and add butter. Dissolve yeast in the warm water. Add salt, sugar, nutmeg and vanilla. Beat in eggs. When milk mixture has cooled to lukewarm, beat into yeast mixture.
Drain raisins and add along with lemon juice.
Add flour 2 cups at a time, beating well. Dough will be very sticky. Cover and set in a warm place until doubled in bulk. Beat again and pour into 4 greased loaf pans. Beat remaining egg and brush over dough.