BUT if the woman is too badly conformed, Dyonis (Book II. page 287) advises the use of the edged crotchets to cut the head to pieces, and bring away, by parts, what you could not do whole. MAURICEAU (Book II. page 287) would have it so, that this sort of crooked knife should have a long handle; and says, that Ambrose Paræus and Guillemeau are for a short one to it. Doctors will disagree. They all however give their respective reasons, and it is indeed hard to say which does not give the worst. MR. De la Motte, in the like circumstances, made use of a bistory, or incision-knife inserted in a sheath, open at both ends; of which he gives the following account. (Observ. 259.) “I INTRODUCED, said he, into the uterus, my left hand, over which I fixed the head; and with my right, I slipped in a sheath open at both ends, in which was an incision-knife, that I applied to this head, and made an opening in it capable of admitting my fingers. I widened it afterwards, as much as I thought proper, and scooped out a part of the brain; after which, I got hold sufficient to bring away the head, of which the volume was considerably diminished.” AMBROSE PARÆUS (Book of Gener. chap. 33.) tells us he had, to his great regret, a case of this sort fall to his share, the head of a fœtus remaining in the uterus. To extricate himself from which, he proposes much the same methods I have described after Dyonis and Mauriceau; and advises, in the same case, that if they do not succeed, recourse should be had to an instrument, called _pied de griffon_, (Griffin’s claw) which he says he took from the French surgery of d’Alechamp. He gives two forms of one, one of two branches, another of four. These instruments, both the one and the other, are made on the principle of the _Speculum Matricis_[34], of which the use is at once, so detestably cruel, and so perfectly unavailing. The Griffin’s claw however differs from the _speculum matricis_, in that the latter has its branches elbowing in an angle, and that the former has its branches streight a-top and at bottom, and arched in the middle, and furnished with roughnesses to seize and keep hold of the head. THOSE who will take the trouble to see the delineation of these instruments, in these authors, will, at the very first glance of the eye, be convinced of their unserviceableness. So would they be of that of another instrument of the like nature, invented some years ago, and attributed to a surgeon of Rouen, which is composed of two crotchets, of which the blades are arched, and their extremities claw-footed.