110 TEACHING SCIENCE IN SECONDARY SCHOOLS

desk top. A little polish and a lot of rubbing gives the shining
finish.
 c. Water Supply. A water cooler-the larger, the better
-is quite satisfactory. The vessel beneath the faucet should be
an earthenware crock, or a wooden bucket. Ordinary water
will do for most of the experiments. The small amount of dis-
tilled water which will be needed, principally for making solu-
tions of silver, lead, and barium compounds, may be easily ob-
tained with a flask attached to a long glass tube in which steam
will condense. A large automatic still is an extravagance for
the small laboratory.2
 d. Source of Heat. Cheap glass alcohol lamps will serve
for most of the students' experiments. You should have at least
one gasoline or alcohol blow torch for bending glass tubing and
performing other experiments that require intense heat.
 e. First Aid. You should have the following items in a
special place, preferably in a separate box:
 For Cuts, 1 roll of absorbent cotton.
 12 rolls gauze bandage, 2-inch.
 1 bottle iodine tincture, U.S.P.
 1 roll zinc oxide adhesive tape, 1-inch. (Purchase all
 of these items from your druggist.)
 1 pair of scissors.
 1 unsharpened pencil. (This, with a strip of gauze,
 makes a tourniquet for seriously cut fingers.)
 For Burns, 1 tube of "unguentine," the best ointment for burns,
 or 1 can of baking soda, tightly covered.
 For Faintness, 1 bottle of ammonium carbonate lumps.
 For Poisons, 1 clean, stiff feather, in a stoppered test tube, to produce
 vomiting. You should familiarize yourself with the list
 of poison commonly found in the laboratory, and their
 antidotes.
 These items are sufficient for first aid; serious accidents must
receive a physician's attention. Let no cut or burn, no matter
how small, go untreated.
 'For a descriptive bulletin of an improvised automatic still which will cost
less than $1, write to Department of Chemistry, George Peabody College for
Teachers.