AUGMENTED SALIVARY SECRETION. 695 
descent of spring heels can take place without rupture of 
horn at coronet, or tilting up of the toe from the shoe. 
In addition to the fact (which I have witnessed, and which 
any one may assure himself of by experiment,) that the 
heels do descend without any such tilting up, or any lesion 
at the coronet taking place, the reasoning is manifestly 
incorrect, because the crust is not in a plane, but curled in a 
circle, and is twisted in the same manner as the curling of 
a strip of paper. Let a common card be taken, and a 
portion of one angle cut off, to represent springing of the 
heel, thus forming an obtuse angle, it is impossible to make 
the sides of this angle touch a flat surface at the same time 
without splitting the card, or (what happens with the hoof) 
curling it into the form of half the crust of the hoof. Let 
the angle of the card, representing the anterior coronary 
part of the hoof, be called A, and that immediately below it 
representing the toe B, that at the coronet and heel C, and 
that below it D. Now let A be depressed downwards and 
backwards, let the coronet and C be allowed to bulge out¬ 
wards, and D be curled inwards, (the exact action which 
takes place in the living foot,) the spring heel comes flat 
upon the table. This tends to assist Mr. Gloag’s idea, that 
the action, if any, must be one of contraction instead of 
expansion. Very truly yours. 
AUGMENTED SALIVARY SECRETION. 
By William Cox, M.R.C.V.S., Ashbourne, Derbyshire. 
Sir, — Notwithstanding your broad hints, of late, with 
reference to the apathy of your old correspondents, they do 
not bring many of them again into the field of commu¬ 
nication, I have no doubt, if they were all interrogated on 
the subject, various would be their excuses : my principal one 
is active engagements. Considering what the 6 Veterinary 
Record/ (now not published,) and Veterinarian 5 have 
done for the profession, I think our only journal ought to receive 
our fullest support, in every possible way. Mr. Smith’s case of 
Affection of the Salivary Glands in a Mare, brings to my 
remembrance some cases of the kind, which perhaps may 
not be uninteresting, at least to some of your readers. 
In 1849, Mrs. Weston, of Ashbourne Green, sent for me 
