Snow-drop Proving by Dr. A. Whiting Vancouver. Faintness, sinking sensations. Sore dry throat with dull headache. Half conscious and worried feeling during sleep. Heart weak with sensation of collapse as if she must fall. Pulse very irregular, rapid and uneven, violent palpitation. Systolic murmur at apex. Therapeutically-decided benefit in cases of Mitral Regurgitation with broken down compensation. Myocarditis with some degree of mitral insufficiency. Dose.–First potency to fifth.