To build well requires close attention and much experience. The science of building is the result of centuries of study. Its progress towards perfection must have been exceedingly slow. In the construction of the first frail and rude habitations of men, the primary object was, doubtless, utility - a mere shelter from sun and rain. But as successive storms shattered his poor tenement, man was taught by experience the necessity of building with an idea to durability. And as the symmetry, proportion, and beauty of nature met his admiring gaze, contrasting so strangely with the misshapen and dispropor-tioned work of his own hands, he was led to make gradual changes, till his abode was rendered not only commodious and durable, but pleasant in its appearance; and building became a fine art, having utility for its basis.