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 ApBiL 17, 188S.]

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��Slab No. 4 has oino pairs of hiud-lbot tracks, with the fore-feet sometimes coinciding, and elsewhere separated at (ousidcrable distances. They are iii relief. ILal is, on the under side

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��ti&e layer, and resemble Nos. 2 and 3, but smaller ; aud tbe stride is two inches less.

Thorough search was made among the vast quantities of waste stone in the main quarries, and also in those of Stone Canon adjoining, as well as in the streets of Denver, where these red quartzitic sandstones are largely used for Sagging. The scarcity of the tracks is em- phasized by the abundance of raindrop impres- sions. There were also many irregular stellate Oioulds, left by some crystallization, which a QajUTvman mistook for tracks. ml ' R. W. Parkkr.

��The XetD'York iiiedicoJ journal of Murcb 28 gives fcn account of an iDtereBtlag aiirglcal operation re- Mntlf performed in New Yorlc, from which we con- leose the following statement: —

On the S4th of January, 1884, a healthy young man, Bruno Enorr, ninet^eti years old, was admitted Into one of the wards at Bellevite hospital, sulTerlng (rom a pialol-shot wound penetratirig the brain through the centre of the forehead. Tlie pntient -waa semi -unconscious, and when aroused was irrita- ble, and ill answer to all qiiegtiouB simply grunted

��' ja.' It was thus impossible to ascertain the circum- Btances of ihoioccnrrence of the injury, li hss since, however, been learned from the patient, thai, while lying upon bis back, he shot himself with a pistol held In contact with his forehead. There was com- plete loss of motion without loss of sensation on Iha right Bide of the body, below the head. There was in- creased sensitiveness on the left side, which was very marked upon the left side of the scalp near the ear.

Preparatory lo the operation, the patient's scalp was shaveil. He was then etherized. A flap of gutta-percha tissue was fastened lo his foreheail to protect hia eyes from the antiseptic solution used.

The b^lle^hole in the skull, which was about half an inch in diameter, was then enlarge<l with a Ron- guer forceps; but during the process a small clot was disturbed, which gave rise to arterial bleeding from beneath a, depressed fragment of the skull whose sharp, convex edge had been driven into the brain. Upon the removal of this fragment the arterial hem- orrhage was alamiingly profuse, and It became evi- dent that tlje patient would speedily bleed to death unless it could be stopped,

After many unsuccessful attempts, Dr. Fluhrer succeeded In catching the artery with a Langenbeck's artery-forceps, and, while he held the Instrument, an assistant attempted to tie the vessel. Unfortunately, during the process the deilcate artery was torn, and It was found impossible to reach the remaining por- tion without removing another piece of the skull which covered It. In the mean time, the bemorrhnge was so great as to threaten the patient's life. This was partially arrested by an assistant, who passed his finger through the opening in the skull, and com- pressed the artery against the brain, while Dr. Fluh- rer removed a disk of bone sutficiently large to enable the artery to be reached with a Pean's forceps. With the aid of two pairs of dlsseciing-forcepi, he succeeded in passing a silk ligature around the artery, and tying it. Upon the removal of the Pean's forceps, however, the pulsations of the artery and brain loosened and threw ofF the ligature, so that the bleeding became as profuse as before. The vessel from which the blood flowed was found to have been severed near Its junc- tion with a large artery, which Dr. Fluhrer now seized below the point of bifurcation. He saw clearly that the short branch could not be tied; and fearing that the slightest movement of the philent'a head might tear the deilcate vessel from the forceps, at)d cause an inevitably fatal hemorrhage, he transferred the artery lo the grasp of the short and light clamp shown in fig. 1, which could lie in the wound with-

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out risk of detachment. No further attempt waa made to ligature the artery, and the metallic clamp was left in the brain for many days. Two and a half hours had been spent In renching this stage of the operation. Having arrested the hemorrhage, Dr.

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