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Description of the surgical technique for exposure and drainage of a liver abscess. Placement of intraperitoneal drains and irrigation of the abscess cavity.

This paper is intended as an exposition of some approximation techniques on irrational transfer functions which are frequently encountered in control systems. Two algorithms for continued fraction expansion and inversion are established.

I) adS I33. L. Giles: {s(S# Tso chquan) Selections from Xt IV, § 7, :@7g42t, IX, XI, XIV, XXI, XXIII, XXV (569-548 B.C.). With commentary by Tu Yu. .t) 1) It has been well established that this MS is a selection from the Ch'gn-ch'i? Tso-chuan chi-chiehv WtJ>SS4%fW with Tu YuXs tt0ja commentary. It did remain obscure, however, who selected these passages. The present writer thinks it to be beyond doubt that this MSS I33 is actually a copy of chapter 5 of the Ch)is-shqs chWh-yao g eX. This well-known work is a collection of passages selected from falnous texts, ranging from the classics and histories to various philosophers, which svas compiled by the svell-known minister of T'ang Tai-tsung, Wei Cheng @ m and his collaborators and presented to the throne in 63I. One of the co-authors was Hsiao Te-yen t-t,X, a man who was famous for his knowledge of the Tso-chgcln, as we learn from his biographies in the two T'ang histories 2). For this reason it appears probable that it was Hsiao Te-yen svho was responsible for the selection of these passages from the Tso-chgan that nour appear in the Chn-shx chWh-yao. Com

Eleven mongrel dogs weighing between 60 and 100 lbs were anesthetized with intravenous pentobarbital, after which a laparotomy was performed. A splenectomy was carried out with the splenic artery being carefully preserved and implanted directly into the left lateral lobe of the liver (Fig. 1). The dogs received no antibiotics postoperativeIy and were started on a regular canine diet on the first postoperative day. After waiting a minimum of one month, a large portion (70%) of the left lateral hepatic lobe was separated from the remainder of the liver using the finger fracture technique as described by Lin [ 51. The isolated hepatic segment was attached only

The post-Beekmantown and pre-Martinsburg rocks of the central Appalachians comprise numerous formations. For the purpose of regional stratigraphic analysis, these rocks can be subdivided into two major units, the Chazy Group at the bottom and the Chambersburg Group above. The major depocenter during Chazy deposition was located in central Pennsylvania. A medial high divided it into a shallower western part and a more deeply subsiding eastern part. Another broad depocenter existed in central West Virginia. Areas surrounding that depocenter received irregularly varying amounts of sediments. With few exceptions the limestone facies of the Chazy covers the area southeast of the broad depocenter in central West Virginia. Northwestward, dolomite and clastic facies are present, but limestone remains the most important lithology. Areas with higher clastic and dolomite ratios appear to be rather limited. During the Chambersburg deposition, a depoaxis existed along the Appalachian Valley. Along that axis two separate depocenters existed in western Virginia. Maximum deposition occurred toward the southwest. An axis of thinning (the Adirondack axis) bordered the Appalachian Valley depoaxis on the west along its northern part. However, this positive area died out toward the south, and, therefore, the "Tazewell axis" of thinning appears to have been nonexistent. A large broad depocenter (Allegheny synclinorium) also extended from central West Virginia into eastern Kentucky. Carbonates (almost all limestone) are the most important Chambersburg facies, but facies with higher clastic ratios occur in parts of the Appalachian Valley of Virginia, an isolated area in West Virginia, and a narrow b lt in Ohio. The Trenton Limestone has produced oil in the Rose Hill and Ben Hur fields in Lee County, Virginia. The Trenton-Black River limestone section has produced gas in numerous old fields in west-central New York. Gas shows have been reported from Middle Ordovician carbonates in West Virginia. Additional hydrocarbon reserves should be found in the Middle Ordovician carbonates of the central Appalachians. Areas of local dolomitization and fracture porosity related too structure are considered to be the most promising prospective areas. End_of_Article - Last_Page 2107

A group of dogs had their intact omentum mobilized to the extent that it could be placed directly upon the surface of the brain. It was subsequently shown, both grossly and histologically, that vascular anastomoses developed between the brain and the omentum and that injected material entered the brain via the vessels at the omental-cerebral interface.

This study shows that direct implantation of a major vein from the portal system into a solid organ, such as the liver or kidney, can lower experimentally produced portal hypertension. It has also shown that in the dog, a vein implanted into a solid organ did not remain patent for over one month. This was thought to be due to the dog's ability to develop extensive collateral circulation between the portal and systemic circulation, which resulted in spontaneous portal decompression. This study prompted the suggestion that venous implantation might have clinical application in children with hematemesis secondary to portal vein thrombosis.