The air smells fresher and flatter? The air tastes interesting? The breeze now makes a whushing sound that is crisper than the sound it made this summer? The angles of the sun are cleaner? The shadows made by the sun are deep tan brown instead of bright yellow brown? The afternoon sun angles are so richly golden and do not stay as long as they should? Thunderhead clouds are round and full and complete and no longer linger on the horizon but drift overhead? The lines that separate the beautiful elements of summer are clean?