TEGUMENTAL SYSTEM. 405 



origin from its areolae, are comparatively large, and tiieir trunks, 

 in the subcutaneous tissue, are readily found and injected : thus 

 we learn why the eruptions of farcy mostly make their appear- 

 ance upon the inside of the thigh and arm, and about the breast, 

 lips, and sheath; and why, when medicine is administered by 

 inunction, these are the parts chosen for perfricution. 



Pores. — Of the infinity of pores the skin exhibits upon its 

 surface, probably the greater number transmit hairs. But there 

 are crowds of others, smaller and consequently less distinctly 

 seen, which are denominated the perspiratory pores, from their 

 being known to emit an imperceptible halitus or vapour, distin- 

 guished as the insensible perspiration ; that which is sensible be- 

 ing the ordinary sioeat. And it is the condensation and collec- 

 tion of this exhalation, in the form of drops of sweat, upon parts 

 that have little or no hair, that serve to mark the situation of 

 these pores ; though they may also be rendered visible by putre- 

 faction or maceration. — Again, there is another set of pores of 

 larger size, more discernible in some places than in others, which 

 are the mouths of follicles: — the nose exhibits them of large 

 size for the secretion of mucus ; the auditory passages are fur- 

 nished with many of them — the glandulce ceruniinoscE — from 

 which issue a waxy matter; and those parts of the skin subject 

 to friction are, in particular, beset witii them : in fact, the unc- 

 tuous matter furnished by them preserves the skin soft and sup- 

 ple, and in some places keeps up a constant greasiness of surface. 



The skin at the bend of the knee and hock has a secretion of 

 this nature, which, from irritation, now and then becomes aug- 

 mented, and from want of cleanliness grows inspissated, and col- 

 lects about the parts, and, if the incrustation be not disturbed, 

 will generate a foul ichorous sore : lameness, of course, must re- 

 sult from this, as soon as stiffness or pain is felt in flexing the 

 limb. When the bend of the knee is its seat, grooms call it the 

 mallenders : but, should the front of the hock become thus af- 

 fected, it is the sallenders. Almost all our treatises on farriery 

 contain some specific recipe for it. Nothing more is required to 

 be done, however, than to cleanse the part from the scurf or scab 

 that may infest it, by soaking it in hot water; and afterwards 

 correct any morbid disposition the skin may have contracted to 

 emit matter, differing in quantity or quality from its natural se- 

 cretion, by anointing the parts daily with some astringent oint- 

 ment — such as will, at the same time, render the skin soft and 

 supple. 



Heel. — The skin of the heel of the horse, imitating the struc- 

 ture of the axilla of the human subject, possesses very many of 

 these glandular pores; through which oozes an unctuous secre- 



