EXHIBIT 23.4     
                        
                     CONSENT OF INDEPENDENT AUDITORS     
   
  We consent to the reference to our firm under the caption "Experts" in
Amendment No. 1 to the Registration Statement on Form S-3 (No. 333-42325) and
related Prospectus of Mallinckrodt Inc., and to the incorporation by reference
of our reports (a) dated March 6, 1995, with respect to the consolidated
statements of operations, stockholders' equity and cash flows of Puritan-
Bennett Corporation and subsidiaries for the year ended January 31, 1995,
included in the Mallinckrodt Inc. Current Report on Form 8-K/A No. 1 dated
June 17, 1998 and (b) dated March 6, 1995, with respect to the consolidated
balance sheet of Puritan-Bennett Corporation and subsidiaries as of January
31, 1995 and the related consolidated statements of operations, stockholders'
equity and cash flows for each of the two years in the period ended January
31, 1995, included in the Mallinckrodt Inc. Current Report on Form 8-K/A No. 4
dated June 17, 1998.     
                                             
                                          /s/ Ernst & Young LLP     
   
Kansas City, Missouri     
   
June 12, 1998