The ribs are to be kept open by the hooks--the opening must be enlarged each way by the knife, if necessary, until the testicles, which are attached to the back bone, are entirely exposed to view, together with the intestines in contact with them. The testicles are enclosed in a thin skin, connecting them with the back and sides--this must be laid hold of with the pliers, and then torn away with the pointed instrument; doing it first on the upper testicle, then on the lower. (The lower testicle will generally be found a little behind the other--that is, a little nearer the rump.) Next introduce the loop; (which is made of a horse-hair or a fibre of cocoa-nut;) it must be put round the testicle which is uppermost, in doing which the spoon is serviceable to raise up the testicle and push the loop under it, so that it shall be brought to act upon the part which holds the testicle to the back; then tear it off by pushing the tube toward the rump of the fowl, at the same time drawing the loop. Then scoop it and the blood out with the spoon, and perform the same operation on the other testicle. Take away the hooks, draw the skin over and close the wound; stick the feathers that you pulled off before on the wound, and let the bird go.
REMARKS.--If the operation be performed without sufficient skill, many of the fowls will prove not to be capons; these may be killed for use as soon as the head begins to grow large and get red, and they begin to chase the hens. The real capon will make itself known by the head remaining small, and the comb small and withered; the feathers of the neck or mane will also get longer, and the tail will be handsomer and longer: they should be kept to the age of fifteen or eighteen months, which will bring them in the spring and summer, when poultry is scarce and brings a high price. Take care, however, not to kill them near moulting time, as all poultry then is very inferior. The operation fails, principally, by bursting the testicle, so that the skin which encloses the soft matter, remains in the bird, and the testicle grows again.
Birds of five or six months are less liable to have the testicles burst in the operation than younger fowls, but they are also more apt to bleed to death than those of from two to four months old.