Adrenergic beta-Antagonists/pharmacology; Anesthesia, Local; Arrhythmias, Cardiac/drug therapy; Propanolamines/pharmacology; Adrenergic beta-Antagonists/therapeutic use; Anesthesia, Conduction; Animals; Arrhythmias, Cardiac/chemically induced; Cornea/physiology; Dogs; Epinephrine/antagonists & inhibitors; Ethers/pharmacology; Ethers/therapeutic use; Female; Guinea Pigs; Indenes/pharmacology; Indenes/therapeutic use; Male; Ouabain/antagonists & inhibitors; Propanolamines/therapeutic use; Propranolol/therapeutic use; Rabbits; Rats; Reflex/drug effects; Tachycardia/chemically induced; Tachycardia/drug therapy; Tail/injuries