humidity absorbing device is in a unique arrangement compatible with the limiting requirements regarding space absorbing capacity and absence of contamination in this way a tape cartridge or other environment sensitive object retained within the casing is essentially sealed from the external atmosphere and protected from degrading environments application_number US 78977977 A description referring now in more detail and by reference characters to the drawings which illustrate a preferred embodiment of the present invention a designates a case for removably retaining magnetic tape cartridges as more fully illustrated in fig1 of the drawings as used herein the term 34 tape cartridge 34 is used in its generic sense to refer to all forms of housings for magnetic recording tape in which the tape is spooled within the housing in this case the tape is normally spooled in such manner that it is capable of being unspooled and withdrawn from the housing or otherwise traversed across an opening in relation to a magnetic recording and reproducing head and thereafter rewound on another spool located within the housing exemplary of such types of cartridges which may be used in the case of the present invention are the so called 34 phillips type 34 tape cassettes the tape cartridges of the type capable of being used in connection with the present invention are capable of being used in both digital and analog recording systems where the analog recording is normally that of audible recordings in many conventional forms.