Carolina Biological

Castlewood Scientific

Fisher Scientific

Flinn

Frey Scientific

Nasco Scientific

Wards

#102  Air Thermometer
This 2" diameter glass bulb, with 10" long x 7mm OD glass stem, is used as an accessory in many heat experiments when studying the expansion of liquids and gases.  Instructions included.

#203  Barometer Tube.
A capillary glass tube 4mm ID x 860mm long that is sealed on one end.

BOYLES LAW APPARATUS
#204 Boyle's Law Tube, Glass parts only.
Used as a replacement for the Boyle's Law J-Tube apparatus.  This unit consists of a J shaped tube, meter stick, and cast iron base mounted to a wooden board.  This is used to demonstrate the relationship of pressure and volume.  Instructions provided.

Flexible Boyle's Law Apparatus. 
A funnel tube and a stopcock tube, connected together by a piece of flexible tubing, run parallel to one another on aluminum rods.  This allows one of the tubes to be raised higher or lower than the other and then it's locked in place.  This unit stands vertical on top of a cast iron base.  Please note, mercury is not included. A heavy weight oil can be used as a substitute for mercury.

#204-3 Boyle's Law Replacement Funnel Tube
#204-4 Boyle's Law Replacement Stopcock Tube

BURETTES
#205 Burette Tip, capillary glass tip with ground tip.
#205-1 Burette Tip Assembly, with glasss burette tip, pinch clamp and 3" of  latex tubing.

#205-2 Burette, 25ml (Numbered every  1ml with .1ml subdivisions)
#205-3 Burette, 50ml  (Numbered every  1ml with .1ml subdivisions)
#205-4 Burette, 100ml (Numbered every  1ml with .1ml subdivisions)

#305 Cartesian Diver.
A all glass constructed cartesian diver with a red band to make the diver more visible.

#305-1 Cartesian Diver Unit. 
Supplied with a Diver and Hydrometer Jar.  A diver is placed in a cylinder of water.  Pressure on the cap forces water into the diver causing it to sink.  Instructions are included.

CONDENSERS
#302-20 Condenser Adapter, Bent
#302-21 Condenser Adapter, Straight
#302-0 Condenser, inner tube supported with rubber connection 250mm
#302-1 Condenser, inner tube supported with rubber connection 300mm
#302-2 Condenser, inner tube supported with rubber connection 400mm
#302-3 Condenser, inner tube supported with rubber connection 500mm
#302-8 Condenser, Leibig, Borosilicate 100mm
#302-9 Condenser, Leibig, Borosilicate 200mm
#302-10 Condenser, Leibig, Borosilicate 300mm
#302-11 Condenser, Leibig, Borosilicate 400mm
#302-12 Condenser, Leibig, Borosilicate 500mm
#302-13 Condenser, Graham, Borosilicate 300mm
#302-14 Condenser, Graham, Borosilicate 400mm
#302-15 Condenser, Graham, Borosilicate 500mm

CONNECTING TUBES
With constricted hose connections.
#2003-1 Connecting Tube, "T", 1/4". . . (6 mm)
#2003-2 Connecting Tube, "T", 3/8". . . (9.5 mm)
#2003-3 Connecting Tube, "T", 1/2". . . (12 mm)
#2003-4 Connecting Tube "T", 5/16"....(8mm)
#2004-1 Connecting Tube "Y", 1/4" ...(6mm)
#2004-2 Connecting Tube, "Y", 3/8". . . (9.5 mm)
#2004-3 Connecting Tube, "Y", 1/2". . . (12 mm)
#2004-4 Connecting Tube, "Y", 5/16". . . (8 mm)

Connecting Tubes, with constricted hose connections, continued
#2005-1 Connecting Tube, "Y", 5/16" OD x 2 1/4" L
#2005-2 Connecting Tube, "T", 5/16" OD x 7/8" L

CONNECTING TUBES
Without constricted hose connections
#2006-1 Connecting Tube, "T", 1/4". . . (6 mm)
#2006-2 Connecting Tube, "T", 3/8". . . (9.5 mm)
#2006-3 Connecting Tube, "T", 1/2". . . (12 mm)
#2006-4 Connecting Tube, "T", 5/16". . . (8 mm)
#2006-5 Connecting Tube, "Y", 1/4". . . (6 mm)
#2006-6 Connecting Tube, "Y", 3/8". . . (9.5 mm)
#2006-7 Connecting Tube, "Y", 1/2". . . (12mm)
#2006-8 Connecting Tube, "Y", 5/16". . . (8 mm)

DROPPING PIPETTES
#1601-4 Length 4", with 5 ml bulb. . .1 dz/pk
#1601-5 Length 6", with 5 ml bulb. . .1 dz/pk
#1601-6 Length 8", with 5 ml bulb. . .1 dz/pk
#1601-7 Length 10", with 5 ml bulb. . .1 dz/pk
#1601-8 Length 12", with 5 ml bulb. . .1 dz/pk

DRYING TUBES (FLINT GLASS)
#401-1 Straight, with one bulb. . .100 mm
#401-2 Straight, with one bulb. . .150 mm
#401-3 Straight, with one bulb. . .200 mm
#402-1 "U". . .100 mm
#402-2 "U". . .150 mm
#402-3 "U". . .200 mm
#403-1 "U" with side arm. . .100 mm
#403-2 "U" with side are. . .150 mm
#403-3 "U" with side arm. . .200 mm

#501 Electrolysis Apparatus, Collecting Tubes & Platinum Electrodes.
Designed for student experiments in electrolysis, this durable, easy-to-use kit features two telescoping gas-collecting tubes graduated to 10ml.  Plus, high-quality platinum electrodes.

EUDIOMETERS
#503-1 Eudiometer, 50 ml, Subdivisions at 0.1 ml
#503-2 Eudiometer, 100 ml, Subdivisions at 0.2 ml

FERMENTATION TUBES
#408 Fermentation Tubes, Durham
#601-1 Fermentation Tube, Large without foot
#601-2 Fermentation Tube, Large with foot
#601-3 Fermentation Tube, Small without foot

FRICTION RODS
#603-1 Friction Rod, Hollow, Glass
#603-2 Friction Rod, Solid, Glass
#603-3 Friction Rod, Half Ground, Glass

GAS MEASURING TUBE
#701-1 Gas Measuring Tube,  50 ml
#701-2 Gas Measuring Tube, 100 ml

#791  Harbottle Apparatus. 
The Harbottle helps students understand the meaning of fluid pressure and pressure sreduction.  A Harbottle is a round, glass, container with a balloon stretched over its opening and a hole in the flattened base that is fitted with a rubber stopper.  Students are amazed when the balloon remains inflated inside the bottle even though it is not tied off or sealed.  Supplied with instructions.

#801 Hero's Fountain.  Graphic Fluid Pressure Demonstration.
For a dramatic presentation.  Just set up the Hero's Fountain, put it on the counter, and pour water in its top. The fountain will spout into the air for several minutes.  How does it work?  As water in the fountains top reservoir enters the lower bulb, which contains air, the air is forces up to the top bulb, compressing the air in that bulb, and forcing the water to spout out of the upper tube.  Entire unit is 50cm high.  Instructions are provided.

#802  Hot Water Heater Demonstration.
The apparatus is designed to demonstrate the operation of a low pressure steam heating system.  The flask in the demonstration apparatus corresponds to the boiler in a heating system, the tubes correspond to the steam and return lines, and the collection chamber corresponds to the radiator.  If colored water is used in the flask, it  can readily be seen that the water in the collection chamber is condensed steam by the fact that it has no color. Instructions provided.

#802-1 Hot Water Heater, glass parts only
All stoppers, tubing, and glass parts for the Water Heater except the 500ml flask.

#803  Hydraulic Press Demonstration.
The transmission and multiplication of forces through a hydraulic system can be observed in this glass model.  The force piston has a handle and a concave top for holding weights. Instructions provided.

INOCULATING NEEDLES
#903-5 Inoculating Needle with glass handle, Platinum needle is 28 gauge x 5 cm length
#903-6 Inoculating Needle with glass handle, Platinum needle is 28 gauge x 4 cm length
#903-7 Inoculating Needle with glass handle and Platinum needle with Loop, 28 gauge x 5 cm 
#902-1 Inoculating Needle with glass handle and Nichrome needle, 24 gauge x 7.5 cm length

MANOMETERS
Manometer, Lecture Table.
This manometer consists of a glass U-tube, open at one end and fastened to a 15 x 58.5 cm hardwood backboard held upright by a metal support base. The large size makes this Manometer easily viewed in a classroom.  Instructions included.
#1298-1 Manometer, 50 cm, glass parts only

Manometer, Vacuum and Pressure Gauge.
This unit is used to measure vacuum and pressure by means of displacement.  A manometer tube with arms one meter long are mounted on a wooden support with a cast iron base.  The glass tube is open on both ends.  Instructions provided.  Oil can be substituted for mercury.
#1299-1 Manometer, Vacuum and Pressure Gauge, glass parts only

Manometer, Complete, 25 x 50 cm.
This unequal manometer tube has two glass arms, 25cm and 50cm.  The longer arm has a funnel at it's top.   The shorter arm has a connector for tubing.  Mounted on wood base with iron support stand. Instructions included.
#1300-1 Manometer, 25 x 50 cm, glass parts only

OSMOSIS APPARATUS
#1501-3 Osmosis, Single Thistle Tube with Membrane

#1501-4 Osmosis, Double Thistle Tube with Membrane

#1501-6 Osmosis Apparatus, Bladder Form with Glass Tube
A glass tube 45cm long with a membrane is attached to one end.  When the membrane is filled with sugar soluti9on and imersed in water, the liquid in the tube wil rise, showing osmotic pressure in a clear demonstration  Instructions included.

#1600 Pascal Vase, Glass Parts Only

#1600-1  Pascal Vase, Complete with Support Stand.
Three different shaped vessels with bottom openings of equal diameter are provided.  Water is poured into the vessel and at the point of equilibrium the disc falls off.  The depth of water will be the same regardless of the shape. Instructions included.

#1602 Pressures Syringe.
Demonstrates that pressure is transmitted uniformly in all directions.  Unit consists of 2" diameter glass bulb and plunger. The bulb has a series of holes in a plane.  When pressure is applied to the plunger water is expelled at an equal distance in all directions.  Instructions included.

RESONANCE TUBES
#1802-1   Resonance Tube, 450mm L x 38mm OD
#1803-1   Resonance Tube, with metric scale, 450mm L x 38mm OD
#1803-2   Resonance Tube, with metric scale, 600mm L x 38mm OD
#1803-3   Resonance Tube, with metric scale, 1000mm L x 38mm OD.( Replacement tube for #1807.)
#1803-6   Resonance Tube, with metric scale, 900mm L x 38mm OD  ( Replacement tube for #1806.)
#1803-7   Resonance Tube, with glazed ends, 600mm L x 38mm OD

STIR RODS
#1900-6-GR    Stir Rods, Flint Glass with Polished Ends, 6", 150mm L. x 5mm OD
#1900-8-GR    Stir Rods, Flint Glass with Polished Ends, 8", 200mm L. x 5mm OD
#1900-10-GR  Stir Rods, Flint Glass with Polished Ends, 10", 255mm L. x 5mm OD
#1900-12-GR  Stir Rods, Flint Glass with Polished Ends, 12", 305mm L. x 5mm OD
#1900-6-DZ    Stir Rods, Flint Glass with Polished Ends, 6", 150mm L. x 5mm OD
#1900-8-DZ    Stir Rods, Flint Glass with Polished Ends, 8", 200mm L. x 5mm OD
#1900-10-DZ  Stir Rods, Flint Glass with Polished Ends,10", 255mm L. x 5mm OD
#1900-12-DZ  Stir Rods, Flint Glass with Polished Ends, 12", 305mm L. x 5mm OD

THISTLE TUBE-FLINT GLASS
604-2 Funnel Tube, Semi-Micro, 6" x 4mm Stem
2001-1 Thistle Tube, 7mm x 300mm Stem
2001-2 Thistle Tube, 7mm x 400mm Stem
2001-3 Thistle Tube, 7mm x 150mm Stem

#2201 Venturi Tube.
A  glass tube 7"" long and 3/4"" in diameter with a constriction at the center, and three vertical tubes.  When manometers are attached to the three openings the lower pressure at the constriction becomes evident.  A verification of Bernoulli's principle.  Instructions included.