ABSORBENTS OF THE HEAD AND NECK. 291 



readily injected by plunging a lancet at random into its sub- 

 stance, and then introducing air or quicksilver. 



Of the Absorbent Glands of the Head and Neck. 



The only claim of lymphatic glands to an existence in the 

 cavity ^of the cranium, is founded upon the supposition that the 

 Pineal, the Pituitary, and Pacchioni's Glands are of this cha- 

 racter; but it is far from being established, and there seems in- 

 deed to be some doubt whether the glands found in the carotid 

 canal, by Mr. Cruikshank, are not the carotid ganglion of the 

 Sympathetic, lately noticed by Laumonier. 



On the external surface of the cranium, over the insertion of 

 the sterno-mastoid muscle, there are from four to six of a small 

 volume; on the face there is one or more small ones, below the 

 zygoma, and from two to four on the external surface of the pa- 

 rotid; there is one or more small ones situated in the substance 

 of the parotid gland, which, according to Burns, are generally 

 the seat of tumours falsely attributed to the parotid itself. 

 There are also some small glands along the facial artery as it 

 ascends from the base of the jaw to the corner of the mouth. 



On the neck there are two or more small glands, immediately 

 under the skin of the symphysis of the jaw, and eight or nine 

 around the submaxillary gland. The most numerous congeries 

 of glands on the neck is, however, along its great blood vessels, 

 and covered more or less by the sterno-mastoid muscle, being 

 principally between its posterior margin and the anterior of the 

 trapezius. Along the latter line there are about twenty, in ad- 

 dition to six just above the superior margin of the clavicle. On 

 the trachea, just above the sternum, there are four, forming the 

 upper end of a series which descends along the oesophagus and 

 trachea to the root of the lungs. 



SECT. II. OF THE ABSORBENTS OF THE UPPER EXTREMITIES AND OF 



THE CONTIGUOUS PARTS OF THE TRUNK OF THE BODY. 



The superficial absorbents of the upper extremity are very 

 numerous, and lie between its skin and aponeurosis. They be- 

 gin at the ends of the fingers and thumb; there being two or 



