WASHINGTON, December 2--With testimony that the national income rate will plunge $20,000,000,000 and 5,000,000 persons will be out of work if the coal strike last 48 days longer, the government rested its contempt case today against John L. Lewis.

The end came quickly after Federal Judge T. Alan Goldsborough announced he will present evidence himself tomorrow which may determine the guilt or innocence of Lewis and the United Mine Workers.

The government's concern today was to portray the consequences of the walkout, the judge plainly indicated, that would have a bearing on the severity of any sentence.

Secretary of the Interior Krug was the final witness. He testified that the new demands Lewis has made would raise the cost of coal 5 cents a ten at the mine. Asked by the judge how that would affect the price to consumers, Krug replied that it probably would cause an even greater increase to them.