An optical information recording and reproducing apparatus for recording and reproducing an information signal onfrom both concave portions and convex portions of guide grooves formed on a recording medium is disclosed. The hierarchy includes virtual network layers and devices in each layer. The aqueous high-concentration solution of N,N-dialkylglycine which contains the N,N-dialkylglycine at a concentration of 30-80% by mass, and a metal-mineral acid salt at a content of 0. This can be accomplished by providing a periodic signal to an input of the processor. The adaptor may be attached to the tapping adaptor by welding or glueing depending upon the material of the tapping adaptor or may be formed integrally with the outlet conduit.