A viscometer for liquids of low viscosity was built to be used at temperatures up to ca. 1000°C with the liquid maintained under a vacuum or inert gas atmosphere. The viscometer follows the method first suggested by Helmholz (8) and later successfully developed by Chiong and Andrade (4). In this method, the liquid is enclosed in a sphere; and the sphere is set in rotatory oscillation about a vertical axis. From measurements of the damping of the oscillations and the period and moment of inertia of the rotating pendulum, absolute values of the viscosity are calculated using the equations derived by Chiong and Andrade (4).
This research is an ethnographic study of literacy as a socially constructed process, literacy viewed as a part of the acquisition and transmission of culture. The focal population was a group of low SES high school students, most of whom were African American, and their children (ages 7 weeks to 4 years), several of whom were enrolled in a day care center housed within the large, urban high school their parents attended in a midwestern U.S. city. The research was an attempt to understand the kinds of literacy, specifically the types and amounts of reading and writing, that were a part of the home and school lives of the student/parents, and their parents, and a part of the home and day care lives of their children.