XIV. APPARATUS AND CHESTS. 509 



Kennedy's corn plaster. Cerae fl. lb. j, tereb. Ven. ^ij, 

 erug. aeris 3J ; put 12 bits in each box. 



Defensive plasters, Spar, seu Tela Gualteri. 01. oliv\ 

 lb. ss, sevi ovill. ^iv, cerse 3X, litharg., tereb. comm., thuris, 

 mastiches, ana 3ij, lioli Armen. ppae. farinae tritici, ana 3 j : pour it, 

 while liquid, upon cloth, and spread it : used for issues, and to 

 keep on dressings. 



Adhesive plasters, Strappiiig^ Spar. adhcBsivum. Diachyl. 

 lib., resinae fl. 4oz., tereb. comm. half an oz., or in summer time 

 only 5ij ; melt, pour upon cloth, and spread it rather thick : 

 much used by surgeons to close the lips of wounds, and retain 

 dressings. 



Spread diachylon plaster, Spar, diachyli. 



Bougies, Candeke probatorice, Cereoli simplices. Catgut, of 

 different thicknesses, dipped in emplastr. hydrargyri, and rolled 

 up smooth upon a slab. — 2. Pieces of old linen about a foot long, 

 wide at one end, and tapering to the other, dipped in emplastr. 

 hydrargyri, emplastr. saponis, or diachyl. simpl. and rolled up 

 while the plaster is yet warm, upon a heated slab. 



Elastic gum bougies. Catgut dipped repeatedly in a solu- 

 tion of elastic gum or Indian rubber, in ether or naphtha, until a 

 sufficient thickness of gum is deposited upon the catgut. 



White bougies. Cerae fl. Ib.j, sperm, ceti 5iij, cerussse 

 acetat. 5V, spread upon cloth, cut in slips, and roll the spread side 

 outwards. 



Bell's bougies. Empl. litharg. |iv, cer. fl. 5 jss, ol. olivae 5iij. 



Elastic gum catheters. A bougie, made of fine catgut, 

 very thickly coated with wax, bent to the proper curve, is dipped 

 repeatedly in the ethereal solution of elastic gum, until a sufficient 

 thickness of gum is deposited upon the bougie: it is then dried 

 perfectly in a warm room or stove ; and finally l3oiled in water to 

 melt out the wax and allow the catgut to be withdrawn. 



2. A wire bent to the proper curve is wrapped round spirally, 

 the turns overlapping each otner, with a thin riband of elastic gum, 

 whose surface has been softened by dipping in boiling water, or 

 still better in etTier, or in a solution of camphire in sj)irit of nitre 

 to which some spirit of wine has been added ; over this is wound 

 a silk riband, and over that another worm of packthread to bind 

 down the whole : when the gum is judged to be dry enough^ the 

 packthread and riband are removed, the catheter dipped for a 

 moment in boiling water to expand it, and allow the wire to be 

 withdrawn, and one or two holes arc then made at the close end. 



3. A fine tissue of si^is wove upon a wire properly bent ; and 



