able to use these holes to hold either the ringsupportor the clamp.Insertthe
dowel stickintothe hole in the centeroftheboard.
Tomakethe ringsupport,cut a lO-inch lengthofcoathangerwire. Measure
6 inches from one end. With a pair ofblunt-endpliers, bend the wire at this
pointto form one loop, or circle. This loop willsupporta funnel, a crucible,
anevaporatingdish, a wire gauze pad, orotherpiecesofapparatus.To use the
ringsupport, insertthe straightend ofit into oneofthe small holes in the
uprightdowel stick, at the desired height.
Tomakethe clamp,obtainai inch dowel stick, 6 inches long. Glue one end
ofthe"handle"ofa pinch-typeclothespinto the end of the dowel stick, and
forextrastrengthwrap the twotogetherwith fine steel wire, pulled tight and
twisted with theblunt-endpliers. When you squeeze it to an"open"position,
theclothespinwill hold a test tube, glass tubing, orotherpiecesofequipment.
As with the ringsupport,you can insert this clampintoanysuitablehole in the
uprightdowelthatisatthecorrectheight foryourneeds.CHEMICALS YOU WILL NEED
Chemical Name Formula Common Name Where Available
Acetic acid CH3COOH vinegar grocerystore
Acetone CH3COCH 3 nailpolishremoverdrugstore
Acetylsalicylicacid CH3COOC.H.COOHaspirin drugstore
Ammoniumdichromate(NH.).Cr.O, chemicalsupply house
Ammoniumhydroxide NH.OH ammoniawater grocerystore
smellingsalts drugstore