line 43: isolated pions -> isolated charged pions line 52: The relative scale .... I do not understand this sentence. Are you stating that test beam data is used to transfer scale of electron initiated showers to that for hadrons ? line 176: "a different method is used " . different to what ? line 180: Explain pulse shape templates . Why 3 templates ? line 198" "energy deficit" .... deficit from what ? line 265: The paragraph has been discussing MB data . Whay suddenly a statement about cosmic rays ? line 282: Can you compare the "method of moments" to iterative method and motivate its introduction? Are the mothods independent ? line 492: "the electromagnetic fraction ... " Is this referring to the long-short fibre difference ?