Enter the chemistry building via the main entrance...
...go through the doors on the right, next to the reception desk...
...turn left and walk down the corridor to the doors at the end...
...go through the doors and climb the stairs...
...keep climbing up another flight of stairs...
...until you reach the fourth floor...
...go through the doors on your left (signposted to W415)...
...and immediately on your right will be the door to W414...
...congratulations - you have arrived :-)
