In the late 19th and early 20th centuries, nature-study was the most widespread orientation to science instruction in the nation's schools. During the four or so decades of its existence, nature-study evolved to become both a common body of knowledge and a philosophical orientation to instruction. To some here at the dawn of the 21st century, the…

Explains how a computer uses its vision to determine the area, edge length, width, height, and center of mass in two dimensions from photos of backlit sea shells. Includes HyperCard codes used to instruct the computer to make the calculations. (MDH)