How To Find: Physics Department Office - Enter through the Compton Hall entrances (where Crow and Compton adjoin) and take the stairs immediately in front of you to the second floor. At the top of the stairs make a left through the double doors to the second room to your left (Room 242).  If this entrance is locked, go around and enter Crow Hall through the doors on the south side of the building, up the 1/2 flight of stairs, ahead through two double doors into Compton Hall, to Room 242 on your left.   Physics Department Library - Enter through the Compton Hall entrances (where Crow and Compton adjoin) and take the stairs immediately in front of you to the third floor. At the top of the stairs to your left will be the entrance to the Gustavus A. Pfeiffer Physics Library.   Physics Department Machine Shop - Enter through the Compton Hall entrances (where Crow and Compton adjoin) and go through the double doors to your right. The Machine Shop will be the first room to your right (Room 143).   Physics Department Shipping and Receiving - Enter through the door at the loading dock level and proceed through the double doors directly in front of you to the end of the hall. Go through the next set of double doors and up the stairs on your right. At the top of the stairs make a left through the double doors to the third room to your left (Room 244).   Crow Observatory - Enter Crow Hall through the doors on the south side of the building and follow the signs to the observatory. If you become disoriented or uncertain as to how to proceed find any hall phone and dial 5-6278, or ask anyone you might see in the halls for assistance.   Arthur L. Hughes Auditorium - Enter Crow Hall through the doors on the south side of the building take the stairs (up) immediately in front of you to the first room on your right (Room 201).