The modern quacks detected. In three parts. I. Exposing their qualifications and remedies. II. Proving the insufficiency of the letter to answer what is proposed by them. III. Unfolding the nature and ill consequences thereof. Dedicated to the president o

Modern quacks detected. In three parts. I. Exposing their qualifications and remedies. II. Proving the insufficiency of the letter to answer what is proposed by them. III. Unfolding the nature and ill consequences thereof. Dedicated to the president o (Online)