Since there were no objections to making the barrel large enough to permit of injections, such as are required for restoring the contour of the cheek and the neck and shoulder, it was made to contain 10 c.c. working capacity, overcoming the necessity of constant refilling, when comparatively large injections had to be made—a fact worth remembering from a practical standpoint, although two or three of these syringes, specially prepared for each patient, might be found desirable by some operators. Yet the simplicity and ready facility with which this instrument can be used and refilled renders it useful and sufficient for performing operations of this nature to any judicious extent. Syringes holding small quantities of the paraffin mixture are found to be a nuisance. The following operators employ syringes of the capacity given: Brœckært 3 c.c. 50 mm. Eckstein 5 c.c. 80 mm. Freeman 5.6 c.c. 90 mm. Downie 10 c.c. 150 mm. The instrument employed by Brœckært, holding less than one dram, would be of little use except to correct very slight deformities about the brow or nose, or dressing up or completing the contour of parts previously filled by larger injections. Another syringe similar in type to the author’s, but of a capacity of 5.6 c.c., was introduced by Harmon Smith. The principles of the syringe are alike, but the style of handles, two flat metal bars at opposite sides, offers no objection when comparatively hard mixtures of paraffin and vaselin are used. While operating the syringe the narrow blades are brought in contact with the soft flexor sides of the thumb and forefinger, indenting the flesh deeply, and with the least unexpected move on the part of the patient permitting it to slip out of the grasp of the surgeon. Its incapacity for large injections also offers some objection, but for correcting smaller defects it is both practical and compact. It is illustrated in Fig. 291. [Illustration: FIG. 291.—SMITH ALL-METAL DROP SYRINGE.] It is obvious that with the screw drop type of syringe the cold semisolid paraffin mixture contained in its barrel is always under the full command of the operator, nor can there be a plugging of the needle, since the great force that can be exerted with a turn of the piston handle would free it, even if the mixture were of a comparatively high melting point, although the force to be applied would naturally increase in proportion to the hardness of the mass within the syringe. The turning of the screw piston forces out the contents of the syringe in the form of a white thread of a diameter equal to the diameter of the lumen of the needle. To facilitate this ejection, the needles should be of ample diameter, not over one inch long and having knife-edged points. Longer needles are not necessary, and only add to the force required to turn the screw handle.