Reassemble the apparatus and leave the instrument ready for use by the next group. As always, be sure to report any problems to your instructor immediately. If the balance reading is unstable, it may be due to a draft. There are two pieces of cardboard under the left side of the Guoy table. Slide one around to the front and leave the other where it is to seal out most drafts.
Instability can also occur if the wire, sample tube, or hanger is contacting the air jacket.
If so, gently reposition the tube in the hanger. If you still get drift, consult your instructor. All rights reserved.