Hope this helps, when I started at the hive one of the hardest things to find information on was proper lab procedure and how to correctly make/use/calibrate glassware and lab equipment. If its not in the equip forum here is a reference.
http://www.ilpi.com/inorganic/glassware/joints.html (http://www.ilpi.com/inorganic/glassware/joints.html)
The whole site is good but this explains what the joints mean.
~Hester18