史前加拿大安大略考

加拿大安大略省的史前阶段,分为3个时期:古印第安时期(公元前10000[?]～公元前7000年);阿尔凯克时期(Archaic)(公元前7000年～公元前1000年),伍德兰时期(Wood land)(公元前1000年始至与欧洲人接触时为止)。伍德兰时期又依次分为早期(碳—14年代测定为公元前1000年到公元前500年);中期(公元前500年到公元500年);晚期(公元500年到有史时期)。据考证,在最后一次冰期的最末或威斯康星期的某个期间,一些成群的狩猎者穿过联接西伯利亚     

"The moon" and "the blood": two emblematic symbols in headache and epilepsy according to scientific traditions of the Salerno Medical school and popular medicine in southern Italy

Before describing the state of knowledge on headache and epilepsy at the Salerno Medical School (SMS), we will briefly summarize in the first part its history through the centuries until the "golden period" of the 12th century when it reached its peak by outshining all others in teaching, studies and research. In the second part we will refer to Saint Donato, healer of epileptics in the south of Italy, whose worship is still alive today. The finding of common symbols in conceptions of headache and epilepsy, both in the scientific tradition of the School and in popular medicine, represents a link which is explicable by the wide dissemination of the school's doctrines.     

City size distributions and urban density functions: some interrelationships

This paper is concerned with "relating the apparent regularities of the population distribution within individual cities to the regularities with which the urban population of a nation is distributed among cities....An attempt is first made to draw the two distributions together in mathematical terms. The discussion then turns to a theoretical consideration of possible interrelations between the two distributions, after which the temporal variation of the parameters of each distribution is examined. This leads to the outlining of an evolutionary model of urban-system development, based on the passage through a number of stages." The analysis focuses on urban systems in Europe and North America.