To the astrologers of the 17th century, the quacks and impostors of the beginning of the 19th are only equal. Quackery and astrology, the latter of which often served as a mask to the former, appear to have been at one time a kind of Castor and Pollux; quackery, however, it would seem has outlived astrology, for there are more who would swallow the nostrum of the quack than the flatulent bolus of the fortune-tellers. Both still have their votaries. One Grigg, a poulterer in Surrey, was set in the pillory at Croyden, (Temp. Edw. IV,) and again in the Borough, for cheating people out of their money by pretending to cure them with charms, by simply looking at the patients, or by practices still more absurd and questionable. Of such doctors there is no lack. This kind of practice offers one of the finest fields for deception of any species of empirical delusion held out to the public at the present day. Such indeed is the infatuation and credulity of the ignorant that, we are confidently assured, a notorious German quack had within one year so many half-guinea applications that he netted £2000; and that the glass bottles in which the precious nostrums were conveyed from the sanctum sanctorum of the mendacious empiric in high Germany, who made his debut in this country by hawking about Dutch drops, amounted to as many two-pences. To those of either sex, who are weak-minded enough to trust their lives to the rash artifices of an ignorant pretender who affects to discover an occult quality in the constitution of the patient denoting the existence of some internal complaint beyond that which less equivocal symptoms sufficiently present to the eye and knowledge of the regular practitioner--we can only say that we conceive them to be justly punished in the loss of their money, and the consequent ruin of their health.