, l1956] SCR 664 at 673 are pressed into service: ". .It was rightly pointed out that it is no sound principle of construction to interpret expressions used in one Act with reference to their use in another Act . " Again, the observations in Macbeth & Co. vs Chisten, at 224 referred to with approval by this court in Commissioner of Sales Tax, Madhya Pradesh vs Jaswant Singh Charan Singh, ; at 725 26 were relied upon: ". .It would be a new terror in the construction Acts of Parliament if we were required to limit a word to an unnatural sense because in some Act which is not incorporated or referred to such an interpretation is given to it for the purposes of that Act alone '. ." It is further contended that a mere amendment of the schedules to the 'Additional Duties Act ' purported by Section 4 of the Amending Act VI of 1980 would be inadequate to serve the purpose of a valid levy on the activity of processing.