64 DISEASES OF THE HORSE’S FOOT 
Lungwitz’s article on the subject, Colonel F. Smith, A.V.D., 
had arrived at similar conclusions by working on the same 
methods. 
It is unnecessary for our purpose here to minutely 
describe the exact modus operandi of these two experi- 
Fic. 36. 
I. Lerr Forse-root SHopD AND MoUNTED TO RECOGNISE THE SINKING 
OF THE Sous. 
a, Iron plate covering the inner half of the horny sole ; 6, openings in the 
same, with screw-holes for the reception of the contact-screw c (the part 
of the sole under the plate is covered with tinfoil, which at @ passes out 
under the outer branch of the shoe, and becomes connected with the tin- 
foil of the wall ; in order to give the freshly applied tinfoil a better hold, 
copying-tacks are at e passed through it into the horn, and one is similarly 
used to protect the tinfoil at the place where the contact-screw touches 
the latter); /, holes with screw thread for the fastening of the angle 
required to measure the movement of the wall, and also for the fastening 
of the conducting-wire, gy; h, conducting-wire passing from the tinfoil ; 
i, isolated nails. 
II. Bar-SHOE WITH OPENINGS. 
uw, Near the inner margin and in the longitudinal bar ; b, for the reception of 
the contact-screw c; d, openings for fastening the angle and the con- 
ducting-wires. 
menters. Briefly, the method of inquiry adopted in each 
case was the ‘push and contact principle’ of the, rdinary 
electric bell, and the close attention which wah aid to 
detail will be sufficiently gathered from Figs. 35 and 36. 
After numerous experiments with the depicted contact: 
