Observations on the formation and uses of the natural frog of the horse : with a description of a patent artificial frog, to prevent and cure contracted hoofs, thrushes, cankers, and sand cracks / by Edward Coleman.

  • Coleman, Edward.
Date:
1800
Catalogue details

Licence: Public Domain Mark

Credit: Observations on the formation and uses of the natural frog of the horse : with a description of a patent artificial frog, to prevent and cure contracted hoofs, thrushes, cankers, and sand cracks / by Edward Coleman. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    19/36 (page 11)
    frog elaftic, expanded and healthy; but where the cavity of the horny frog is contracted, the fenfible frog is violently fqueezed, and becomes hot and inflamed, and from this heat the horn is dry and inelaftic. Thofe who from falfe kindnefs raife the frog from the ground, to prevent preflure, will pro- bably be furprifed at the affertion, that the fenfible frog fuffers moll pain and mod preflure when molt raifed from the ground. It is, neverthelefs, literally true ; for in pro- portion as the frog is free from perpendicular preflure, the heels of the hoof contractand, as the hoof contracts, the frog alfo becomes con- traced ; and, in proportion to the degree of eontraSlion, the fides of the fenfible frog, with- out any refpite, mull receive lateral preflure from the fides of the horny frog. Perpen- dicular preflure is natural both to the horny and fenfible frogs, and the afcent of thofe or- gans prevents concuflion and preferves them in health. But nature has made no proviflon for permanent unnatural preflure, produced by a contraSlion of the cavity of the horny frog, and it has certainly not been confidered that the frog fuffers the greateft violence* and more preflure, when raifed from, than when in conr ta£t with, the ground. Where