stormer                 package:MASS                 R Documentation

The Stormer Viscometer Data

Description:

     The stormer viscometer measures the viscosity of a fluid by
     measuring the time taken for an inner cylinder in the mechanism to
     perform a fixed number of revolutions in response to an actuating
     weight.  The viscometer is calibrated by measuring the time taken
     with varying weights while the mechanism is suspended in fluids of
     accurately known viscosity.  The data comes from such a
     calibration, and theoretical considerations suggest a nonlinear
     relationship between time, weight and viscosity, of the form 'Time
     = (B1*Viscosity)/(Weight - B2) + E' where 'B1' and 'B2' are
     unknown parameters to be estimated, and 'E' is error.

Usage:

     stormer

Format:

     The data frame contains the following components:

     'Viscosity' viscosity of fluid.

     'Wt' actuating weight.

     'Time' time taken.


Source:

     E. J. Williams (1959) _Regression Analysis._ Wiley.

References:

     Venables, W. N. and Ripley, B. D. (2002) _Modern Applied
     Statistics with S._ Fourth edition.  Springer.

