position subject onto marked area; align groin, navel, and feet to reference points
on the graph paper, mark the with of subject’s hips; follow the outermost shadow of subject’s hips, as projected from single spot light
position pressuring platform onto upper hips of subject; align platform to reference points
apply pressure to subject: the constant pressure factor consists of Irma, a 160 lb assistant who stands on the pressuring platform, feet aligned to specially marked areas
as hips of subject expand, trace newly formed shadow of subject’s hips after pressure is applied; mark name and time in upper corner
establish difference between hip width before and after Irma pressure; form a composite local range of values for this differential
