A feed dog device for a sewing machine includes a feed dog mount mounted under a needle plate and having a feed dog mounted thereon to permit the feed dog to extend through slots in the needle plate. A method for producing a developing solution for photolithography capable of suppressing TBAH deposition when producing the developing solution by diluting a concentrated developing solution containing TBAH and a production apparatus used for the production method. The method may use the change notifications as an indicator to start the comparison and restart the comparison upon the receipt of a new notification. The transmitter operates in a sleep mode until the sensor state changes. A plurality of rotatable magazines may be utilized in the delivery device.