VOL. XXI.] PHILOSOl'HICAL TRANSACTIONS. 451 



This signal history affords matter for much observation ; but the only use I 

 shall at present make of it is, that if, in a person of this age, above 6o, in a 

 wound whereby the trachea was cut through, and several of the cartilages beaten 

 together, the divided parts of the trachea may be made to unite and grow toge- 

 ther : certainly then laryngotomy, which is a much less dangerous wound indeed, 

 in violent quinzies, in danger of suffocation from causes of a like nature with 

 them, may safely, and ought to be put in practice. The disadvantage is a 

 slight wound, easily cured : the advantage nothing less than the saving of life. 



On the Application of the Pneumatic engitie to Cupping Glasses. By Mr. The. 

 Luffkin. N° 259, p. 408. Translated from the Latin. 



Let ABCD, fig. 5, pi. 10, be a concave cylinder of brass, of a proper thickness, 

 1 inch in diameter, and 10 or 12 inches long, so exquisitely polished on the 

 inside, as not to have the least flaw or inequality, and having a small hole o 

 near the bottom ; also let there be a lid or cover ef, fig. 6, to be fixed on the 

 cylinder by two screws, and a bottom gh, fig. 7, to be soldered to the cylinder ; 

 and let that end of the syringe, l, 2, be perforated in the middle through to the 

 outside of the bottom. Let the iron rod nn, fig. 8, of a proper thickness, be 

 fitted to the length of the cylinder ; at its extremity let there be a plate of brass 

 LM, and at 2 inches distance another ik ; the intermediate space being filled up 

 with threads moistened in oil, so as to shut exactly the cavity of the cylinder, 

 and having a handle at n. This engine, composed of all these parts, is not 

 unlike a surgeon's syringe. Let there be also made another brass cylinder opgr, 

 fig. 9, of the size of the figure, with two wings os, ps, and of such a bore as 

 that its inside being cut into a female screw, it may be exactly fitted to receive 

 the male screw ; let the bore be enlarged from a and r to tt : lastly, make the 

 shoulder vv, and a plate w, perforated in the middle to fit the shoulder, and 

 be fixed to it. Further, make a right cone 1, 2, 3, fig. 10, bored through its 

 axis, and enlarge the bore from 12 to 4 4 ; also make a shoulder 5 5 to fit 

 exactly the cavity of the cylinder tt, and be firmly fixed in it; make also a 

 brass spring fig. 11, in a spiral form round the cylinder, of a proper strength, 

 and nearly equalling the diameter of the box vv 4 4, but a little higher than the 

 box when left to itself, and having at the lower extremity a plate 7 7 of the 

 same magnitude, the lower part of which is to be armed with a soft leather 

 moistened in oil, to close the orifice of the syringe. Then, at the top of the 

 cupping glass, fig. 12, is made a round bore, by which the cone is let down as 

 far as the wings ss of fig. 9, the chinks or fissures being filled with cement 

 made of rosin, turpentine, and lime. Finally, the lid 6 7 6 7, fig. 13, is to be 



3 M 2 



