{HEAD ~ A method} for determining the density of loose fill, blown in place insulation comprises {TAIL ~ the step} of providing a structure with a cavity having a known depth 
comprises
{ HEAD ~ A method } for determining the density of loose fill , blown in place insulation comprises { TAIL ~ the step } of providing a structure with a cavity having a known depth
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH