Carolina Biological Supply Company:
Acids & base tests using red cabbage juice & water
Carolina Biological Supply Company:
Human artery & vein
Carolina Biological Supply Company:
Intravascular clotting defect
Carolina Biological Supply Company:
Vein, section
Carolina Biological Supply Company:
Acid and base test using Alka-Seltzer
Carolina Biological Supply Company:
Acid & base test using vinegar