obtainable, but their use is objectionable for a number of reasons, chief of which is the danger of overriding a foreign body or a lesion, or of perforating a lesion, or even the normal esophageal wall. The slanted end on the esophagoscope obviates the necessity of a mandrin for introduction. The longer the slant, with consequent acuting of the angle, the more the introduction is facilitated; but too acute an angle increases the risk of perforating the esophageal wall, and necessitates the utmost caution. In some foreign-body cases an acute angle giving a long slant is useful, in others a short slant is better, and in a few cases the squarely cut-off distal end is best. To have all of these different slants on hand would require too many tubes. Therefore the author has settled upon a moderate angle for the end of both esophagoscopes and bronchoscopes that is easy to insert, and serves all purposes in the version and other manipulations required by the various mechanical problems of foreign-body extraction. He has, however, retained all the experimental models, for occasional use in such cases as he falls heir to because of a problem of extraordinary difficulty. * A 9 mm. X 45 cm. esophagoscope will reach the stomach of almost all adults and is somewhat easier to introduce than the 10 mm. X 53 cm., which may be omitted from the set if economy must be practiced. [FIG. I.--Author's laryngoscopes. These are the standard sizes and fulfill all requirements. Many other forms have been devised by the author, but have been omitted from the list as unnecessary. The infant diagnostic laryngoscope (C) is not for introducing bronchoscopes, and is not absolutely necessary, as the larynx of any infant can be inspected with the child's size laryngoscope (B). A Adult's size; B, child's size; C, infant's diagnostic size; D, anterior commissure laryngoscope; E, with drainage canal; 17, intubating laryngoscope, large lumen. All the laryngoscopes are preferred without drainage canals.] [FIG. 2.--The author's bronchoscopes of the sizes regularly used. Various other lengths and diameters are on hand for occasional use for special purposes. With the exception of a 6 mm. X 35 cm. size for older children, these special bronchoscopes are very rarely used and none of them can be regarded as necessary. For special purposes, however, special shapes of tube-mouth are useful, as, for instance, the oval end to facilitate the getting of both points of a staple into the tube-mouth The illustrated instruments are as follows: A, Infant's size, 4 mm. X 30 cm.; B, child's size, 5 mm. X 30 cm.; C, adolescent's size, 7 mm. X 40 cm.; D, adult's size, 9 mm. X 40 cm.; E, aspirating bronchoscope made in all the foregoing sizes, and in a special size, 5 mm. X 45 cm.]