Critical analysis of the results of space experiments, taking into account the contributlon of large particles to the total mass production of comet Halley leads to much higher values of the dust production rate than those derived from the first analysis of space measurements. As a consequence it seems necessary to correct the gas to dust ratio of the mass production by a factor of 10, from 0,1-1,0 to 1.0-10. The corrected values of dust production rate are in much better agreement both with the current concepts of the comeťs history and wlth the evolution of Its meteor stream.