176 ON THE HAIR. 



"4. LYMPHATICS OF THE LEFT FORE EXTREMITY. 



" The lymphatics of this member present the same dispo- 

 sition as those of the posterior limbs, and are divided into 

 superficial and deep-seated. The former, consisting of diverse 

 ramifications, accompany the superficial veins ; the more con- 

 siderable of them forming a plexus, which accompanies the 

 cutaneous (superficial brachial) vein of the limb. The deep 

 vessels originate from the foot, muscles, and bones, pursue 

 the divisions of the deep veins, and plunge into the axillary 

 glands, wherein they unite with the superficial, and whence 

 they extend to the thoracic duct. 



" THE RIGHT TERMINATING TRUNK OF THE LYMPHATICS. 



" This very short lymphatic canal is obliquely situated at 

 the entrance of the thorax, upon the transverse process of 

 the last vertebrae of the neck, extending in a direction from 

 above downward, and from without inward, and terminating 

 most commonly in the right axillary vein ; though, in some 

 instances, it joins the thoracic duct. This trunk is formed by 

 the lymphatics coming from the right axillary glands, and 

 some from the right lung, and right side of the neck and 

 trachea." 



ON THE HAIR. 



Professor Percival observes, that " all hair has a com- 

 mon similarity in its structure and mode of growth ; whether 

 it assumes the appearance of human hair, that of the coat or 

 mane of the horse, the wool of the sheep, the fur of the rab- 

 bit, the bristles of the hog, or the spines of the hedgehog ; 

 its particular varieties in every one of these animals are owing 

 to the thickness and disposition of the fibres of its cuticular 

 case. The coat varies in quality, color, and length, in horses 

 of various breeds ; the Arabian is characterized by his smooth, 

 silken, and glossy coat ; the cart horse, the Shetland pony, 



