The object of this method of examination is to look into the stomach and to ascertain the condition of the gastric mucosa. This method was inaugurated by Mikulicz1 in 1881. The gastroscope is similar in shape and construction to the cystoscope, but much larger in size.2 This method of examination has not, however, come into practice, and will hardly ever prove of much value; the chief reason being that a stiff metal tube has to be inserted into the stomach, which is hard to manage and causes great discomfort to the patient. As in all cases in which we have to deal with cancer or with other grave lesions of the stomach, there is always suspicion of an ulcer, this means of examination would not only be inconvenient, but also dangerous on account of the risk of perforation.