Bay-windows can usually be added to a house with good effect and an increase of comfort to the inmates.

The wall should be cut out the height and breadth desired, and the bay-window built out from the house. It is best to arch over the entrance to bay, as this separates the old ceiling from the new and counteracts the effect of con-trast of old and new work.

If porticoes, verandas, cornice, verge-boards, or brackets are to be added, great care must be used to make the outlines of old and new work blend, as it frequently happens that such additions present anything but a harmonious appearance.

It is frequently desired to increase the number of rooms by building wings or rear additions; but unless a new front is added, the new must always be kept subordinate to the old.

Fig. 28.

If additions are to be made to brick buildings, the new wall must be joined to the old by cutting a vertical groove in the old wall four inches deep, and broad enough to receive the brick of the new wall, as when the courses of the new wall are locked into the old, brick for brick, there will invariably be settlement enough in the new to break every brick at the point of intersection; hence the reason for connecting by a groove which admits of settling without breaking. The joints of courses in new work should be laid a little above the old to allow for settling.