| Y 4.M 28 | Congressional Mailing Standards Commission (House) |
| Y 4.M 31/1 | Committee on Manufactures (House) |
| Y 4.M 31/2 | Committee on Manufactures (Senate) |
| Y 4.M 51 | Select Committee to Investigate Charges against Members of Congress (House) |
| Y 4.M 53 | Committee on Merchant Marine and Fisheries (House) |
| Y 4.M 57 | Select Committee on Proceedings of the Board of Commissioners on Claims against Mexico (Senate) |
| Y 4.M 58 | Committee on Mileage (House) |
| Y 4.M 59/1 | Committee on Military Affairs (House) |
| Y 4.M 59/2 | Committee on Military Affairs (Senate) |
| Y 4.M 59/3 | Militia Committee (House) |
| Y 4.M 66/1 | Committee on Mines and Mining (House) |
| Y 4.M 66/2 | Committee on Mines and Mining (Senate) |
| Y 4.M 69/1 | Select Committee to Inquire into Alleged Frauds in Recent Elections in Mississippi (Senate) |
| Y 4.M 69/2 | Committee on Levies and Improvements of the Mississippi River (Senate) |
| Y 4.M 69/3 | Select Committee on Missing Persons in Southeast Asia (House) |
| Y 4.M 92 | Special Committee Investigating the Munitions Industry (Senate) |
| Y 4.M 97 | Joint Committee on Muscle Shoals |
