Amacrine Cell Data These data record a bivariate pattern of chlinergic amacrine cells within the retina of a rabbit. I acquired them from Prof A Hughes (Melbourne). For a general description, see chapter 1 of Diggle (2003, Statistical Analysis of Spatial Point Patterns, second edition). The observation window for the data is the rectangle (0,a) X (0,1) where the unit of distance is 662um. There is some doubt about the precise value of a. A reasonable choice in my opinion would be 1060/662, or aproximately 1.6. There is some old evidence that 1070/662 SHOULD be correct, but this would leave a suspiciously empty border along one edge of the rectangle.