| Y 4.N 16 | Select Committee on Narcotics Abuse and Control (House) |
| Y 4.N 21/1 | Committee on the Conservation of National Resources (Senate) |
| Y 4.N 21/2 | Special Committee to Investigate the National Security League (House) |
| Y 4.N 21/3 | Select Committee to Investigate Disabled Soldiers League Inc. (House) |
| Y 4.N 21/4 | Special Committee to Investigate the N.L.R.B. (House) |
| Y 4.N 21/5 | Select Committee Investigating the National Defense Migration (House) |
| Y 4.N 21/6 | Select Committee Investigating the National Defense Program (Senate) |
| Y 4.N 21/7 | Select Committee to Conduct the Study and Survey of the National Defense Program in Its Relation to Small Business (House) |
| Y 4.N 21/8 | Select Committee on National Water Resources (Senate) |
| Y 4.N 21/9 | Special Committee on the Termination of the National Emergency (Senate) |
| Y 4.N 22/1 | Committee on Naval Affairs (House) |
| Y 4.N 22/2 | Committee on Naval Affairs (Senate) |
| Y 4.N 22/3 | Joint Committee on Naval Affairs |
| Y 4.N 42/1 | Select Committee on New Orleans Riots (House) |
| Y 4.N 42/2 | Select Committee on the Alleged New York Election Frauds (House) |
| Y 4.N 42/3 | Joint Select Committee on the Newburg, N.Y. Monument and Centennial Celebration of 1883 |
| Y 4.N 62 | Select Committee on the Nine Foot Channel from the Great Lakes to the Gulf |
| Y 4.N 81 | Joint Committee on the Investigation of the Northern Pacific Railroad Land Grants |
| Y 4.N 95 | Select Committee on Nutrition and Human Needs (Senate) |
