It may be safely said that no honest and competent physician will undertake to treat cases by letter. _No one worthy of patronage will guarantee a cure in any case_, for an educated practitioner understands that cases are many and frequent where the best human skill may be exerted in vain. Further than this, a physician of merit will not advertise himself in the newspapers, except to announce the location of his office or residence. Such physicians are jealous of their personal and professional reputations, and are proud of their calling, which is justly esteemed one of the noblest on earth. They are men of humanity and learning, and they take, perhaps, more pleasure in relieving suffering than in making money. If a patient cannot pay for their services, they give them free in the name of the Great Healer of all ills. They have no such things as private remedies. They use their knowledge for the good of mankind, and are prompt to make known their discoveries, so that all the world may enjoy the benefit, they themselves being rewarded with the fame of their inventions. Not so with the quacks. A few have some medical knowledge, and are even graduates of regular colleges, but the majority have neither medical knowledge nor skill. They know their remedies are worthless, and they offer them only to make money. They know in many cases that their nostrums will inflict positive injury upon their victims; but they are careless of the harm they do. They live upon human misery. We may safely assure the reader that not one single physician, so called, who conducts his business by means of advertisements or circulars, is really competent to treat the cases he professes to cure, and that no one knows this better than himself. Do not answer any advertisement you may see in the newspapers. They are worthless. Above all do not take the medicines sent you by the advertisers. Some of them are poisonous substances. If you doubt this assertion, take the compound to any druggist of your acquaintance, and ask him to analyze it, and tell you what it is worth as a healing agent. If you need medical advice, go to some physician that you know and have confidence in. Don't put yourself in the hands of a man you know nothing of, who would just as soon poison you as heal you, and who pursues his calling, in most cases, in violation of the laws of the land. Let quack doctors, or, in other words, advertising doctors, alone_. PATENT MEDICINES.