▁only ▁one ▁of ▁these ▁books ▁for ▁convenience . ▁ ▁History ▁When ▁first ▁rit ual ▁functions ▁books ▁were ▁written , ▁the ▁Sac r ament ary ▁in ▁the ▁West ▁and ▁the ▁E uch olog ion ▁in ▁the ▁East , ▁they ▁contained ▁all ▁the ▁priest ' s ▁( and ▁bishop ' s ) ▁part ▁of ▁whatever ▁functions ▁they ▁performed , ▁not ▁only ▁for ▁the ▁Mass ▁or ▁Div ine ▁Lit ur gy , ▁but ▁for ▁all ▁other ▁sacr aments , ▁bless ings , ▁sacr ament als , ▁and ▁r ites ▁of ▁every ▁kind ▁as ▁well . ▁ ▁From ▁one ▁book ▁to ▁many ▁The ▁contents ▁of ▁the ▁R it ual ▁and ▁Pont ific al ▁were ▁in ▁the ▁Sac r ament aries . ▁In ▁the ▁Eastern ▁Church es ▁this ▁state ▁of ▁things ▁still ▁to ▁a ▁great ▁extent ▁remains . ▁In ▁the ▁West ▁a ▁further ▁development ▁led ▁to ▁the ▁distinction ▁of ▁books , ▁not ▁according ▁to ▁the ▁persons ▁who ▁use ▁them , ▁but ▁according ▁to ▁the ▁services ▁for ▁which ▁they ▁are ▁used . ▁The ▁Miss al , ▁containing ▁the ▁whole ▁Mass , ▁succeeded ▁by ▁the ▁Sac r ament ary . ▁Some ▁early ▁Miss als ▁added ▁other ▁r ites , ▁for ▁the ▁convenience ▁of ▁the ▁priest ▁or ▁bishop ; ▁but ▁on ▁the ▁whole ▁this ▁later ▁arrangement ▁involved ▁the ▁need ▁of ▁other ▁books ▁to ▁supply ▁the ▁non - E uchar istic ▁functions ▁of ▁the ▁Sac r ament ary . ▁These ▁books , ▁when ▁they ▁appeared , ▁were ▁the ▁prede cess ors ▁of ▁the ▁Pont ific al ▁and ▁R it ual . ▁The