A group of lawmakers is asking the House Appropriations Committee to halt spending for the $8.25 billion super-conducting supercollider because of what it called continued broken promises about the project.

In a letter to the chairman of the subcommittee on energy and water development, 44 House members suggested Congress spend no more money until the Energy Department lines up foreign contributors and "delivers on its promises to limit the project's total costs."President Bush is seeking $534 million for the collider, being built in Ellis County, Texas, south of Dallas.

Rep. Sherwood L. Boehlert, R-N.Y., one of the signers, cited questions about the collider's superconducting magnets, which have never before been produced on such a scale. Approximately 8,600 magnets will be used to guide beams of protons around a 54-mile underground ring at almost the speed of light until they smash together with an energy of 40 trillion electron volts.