arts, household arts, and other sciences. The lists include all the articles needed for the problems outlined in this manual. For convenience in ordering supplies the articles are arranged alphabetically, and are numbered serially so that the teacher may, if desired, remove these sheets from the manual and send them to supply houses for estimates. The number in parentheses following the name of an article indicates the problem in which it is first used, thus referring the reader to the kind of use proposed for it. The approximate quantities needed are given, but teachers will often wish to change these quantities. Not all the articles listed are absolutely essential, but all will be found useful. The cost of the apparatus listed can be reduced about one third by omission of field glasses, compound microscope, small telescope, and incubator. When funds are limited, it is recommended that part of the apparatus be purchased each year until the equipment is adequate. At the most, the cost is but a few hundred dollars. Since prices fluctuate widely, however, they have not been included in this list, but may be secured from supply houses at the time when purchases are to be made.

Microscope slides and cover glasses (23),

Motor, St. Louis form (48)
Mortar and pestle, 3 in. (60)
Needles (46)

Osmometer (57)

Pinchcocks (2)
Pliers (48)

Pulleys, single (41)

Push buttons (47)

Ring stands, 3 rings (1)

Rubber, sheet (5)

'Rubber bands, assorted (30)

Rubber friction tape (48)

Rubber stopper, 1-hole, No. 1 (6)

Rubber stopper, 1-hole, to fit 2-liter bottle (4)
Rubber stopper, 1-hole, to fit 1000 cc. Pyrex

flask (4)

Rubber stopper, 2-hole, No. 5 (1)

Rubber stopper, 2-hole, No. 7 (2)

Rubber stopper, 2-hole, to fit open bell jar (4)
Rubber stopper, 2-hole, to fit quart milk bottle (17)

NAME

Rubber stopper, solid, to fit 6-in. side-neck test tube (18)

Test-tube holder (16)

Test-tube stand (18)

Thermometers, C. and F. scales. -10° C. to

110° C. (9)

Tripod with one ring (54)

Tweezers (forceps) (18)

Weights, metric, 1 g. to 1000 g. (4)

Wire gauze, 5 in. square (8)

Y-tubes, brass or iron (4)

B. GLASSWARE

Beakers, Pyrex, 100 cc. (5)
Beakers, Pyrex, 250 cc. (9)
Bottles, 2-liter (4)

Bottles, wide mouth, low form, 4 oz. (5)
Bottles, wide mouth, 6 oz. (2)

Calcium chloride tubes, 6 in. (32)

Cylinder, not graduated, 1000 cc. (1)

Dishes, crystallizing, 3 in. (16)

Flasks, Pyrex, 500 cc. (8)

Flasks, Pyrex, 1000 cc. (4)
Funnels, 3 in. (60)

Funnel, 6 in. (24)

16

Glass tubing, in., 5-foot lengths, two lengths of capillary tubing (1, 48)

Glass tubing,in. dia., 5-foot lengths (53)

NAME

Glass tubing, capillary, 4 mm. (10)

Glass plates, 2 in. square (15)

Glass plates, 8 in. square (25)

Graduate, 500 cc., graduated both up and down (4)

Petri dishes, 10 cm. in dia. (27)

Test tubes, 4 in. (5)

Test tubes, 6 in. (6)

Test tubes, 6 in., side-neck (18)
Test tubes, 8 in. (1)
Thistle tubes (5)

NAME

Candles, small, in. (18)
Cardboard, heavy, white (12)
Carrots, large (57)

Coal, hard (33)

Clover seed (58)

Corn, large ears (66)

Corn, shelled (59)
Corn sirup (26)

Cotton, absorbent (30)

Cross-section paper (16 in. by 22 in.) -in.
squares (13)

Cross-section paper, metric (8 in. by 10 in.) (28)
Eggs (64)

Fan, palm-leaf (30)

Fire extinguisher (18)

Frogs' eggs (63)

Gelatin plates (27)

Geranium plants, in pots (20)

Gasoline (33)

Paste, library (16)

Pins (48)

Globe, black, 12 in. (14)
Ice (9)

Incubator (64)

Ink, blue-black (8)

Iron, scrap, in small pieces (33)
Kerosene (33)

Lamp bulbs, any size (3)

Lily plants (or iris, Wandering Jew, corn, liveforever, etc.) (23)

Milk bottles, quart size (17)

Monthly Evening Sky Map, for the months used (50)
Mustard seed (58)

Nails, large spikes (47)

Peanuts, not roasted (65)

Picture wire (19)

Plants, in pots (coleus or geranium) (31)
Potato (20)

"Punk," or any other slow-burning, smoking

substance (7)