Neuberger improved double ruling counting chamber. 
Including a pair of cover glasses, RBC and WBC diluting pipettes.


 

Magnification: 50x.
No power requirement and very light weight. 
The Micro slide viewer is cost effective and gives the students a quality image.


 

C-clamp also included. 
Overall size: 31 x 9 x 22"; wt, 5-1/5 lb.
Plugs into any standard outlet using the included AC/DC adapter. 
An exceptional lighted magnifier that attaches to your desktop or tabletop for easy, hands-free use.
The adjustable metal arm and rotating head allow you to position the magnifier where you need it.  
Its large 5" glass lens with 1.8x magnification crystal-clear viewing, and 48 ultra-bright LED lights supply superior illumination. 


 

12x 16in microfiber cloth.
Removes dust, oil smudges and dirt.
Can be used with or without cleaning sprays and fluids.
Can be used multiple times.
Suitable for binoculars, cameras and larger gear.


 

To reverse engine's direction, use ice water.
Rotate the flywheel by hand. 
Avoid rough handling.  
Made of durable stainless steel, this stylish and affordable low-temperature differential unit demonstrates how heat engines convert heat energy into mechanical work. 
A classic demonstration of thermodynamics for middle school. Overall height, about 5-3/4". 
Includes instructions; hot and cold source and cup are needed but not supplied.
Heat source should not exceed 100° C and cold source should not be below −20° C.
This is a delicate instrument and the connections between the flywheel and pistons can be damaged. 

To ensure that the engine works well, perform the following 2 steps before each experiment:

• The flywheel, connecting rods, and pistons should move freely and without resistance.
• Check that the connecting rods are properly seated. Linkages to the piston should move freely.

Flywheel diameter: 3-1/2" (9 cm)
Unit height: 5-3/4" (14.5 cm)
Unit weight: 7.6 oz (216 g)
Displacement cylinder diameter: 3-1/2" (9 cm)


 

Mounted on a sturdy base.
Placard with key engine components.
Solid construction of cast metal and plastic.
These items are sold separately.
Cycles through all stages with hand crank rotation.
Each model includes a simulated spark plug (lamp) to indicate the firing point. 
Depending on the model, this lamp requires 2 AA batteries or a 6- to 12-V power supply (not included). 


 

Metal identifications stamped on one end. 
Includes aluminum, copper, stainless steel, tin, and zinc.
Consists of five 1/2"-diameter hooked cylinders, precision machined to equal mass. 


 

Study absorption, emission, and Newton's law of cooling. 
Cans are identical except for color: one is black and the other is bright tin. 
Insert a thermometer (not included) in the hole at the top of each can to measure changes in water temperature.