The Capillarity Apparatus is intriguing demonstration of molecular attraction.

• Four Glass Tubes
• Metal Bass
• Length: 5½"
• Width: 4¾"

Adding colored water to the reservoir tubes of the apparatus shows how water ascends into spaces by capillary action. The water levels will vary in the four differently-sized glass tubes, rising above the reservoir level in the narrower tubes.

The glass unit is firmly supported in a metal base and measures 5½ x 4¾".