Weather modification : hearings before the Subcommittee on Communications and Power of the Committee on Interstate and Foreign Commerce, House of Representatives, Ninetieth Congress, first session on H.R. 9212, a bill to authorize the Secretary of Commerce to carry out a comprehensive program in the field of weather modification, and for other purposes : H.J. Res. 688, to provide for an expanded and intensified effort to increase the accuracy and extend the time range of weather predictions and to request the president to take action so that the peoples of the United States derive, at the earliest possible time, the social and economic benefits that would accrue from achievement of this new level of capability in weather prediction, October 31 and November 7, 1967.