1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   ----------
                                  SCHEDULE 13G
                                 (RULE 13D-102)

             INFORMATION STATEMENT PURSUANT TO RULES 13D-1 AND 13D-2
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 18)

                         MINE SAFETY APPLIANCES COMPANY
                         ------------------------------
                                (Name of Issuer)

                                  Common Stock
                                  ------------
                         (Title of Class of Securities)

                                    602720104
                                    ---------
                                 (CUSIP Number)

                                 August 31, 2000
                                 ---------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[X] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

CUSIP No.  602720104                                          Page 1 of 6 Pages

    1)  Names of Reporting Persons
        IRS Identification No. Of Above Persons

            The PNC Financial Services Group, Inc.
              (formerly, PNC Bank Corp.)             25-1435979

    2)  Check the Appropriate Box if a Member of a Group (See Instructions)
          a)  [ ]
          b)  [ ]

    3)  SEC USE ONLY


    4)  Citizenship or Place of Organization    Pennsylvania

    Number of Shares           5)  Sole Voting Power          1,230,582

    Beneficially Owned         6)  Shared Voting Power              -0-

    By Each Reporting          7)  Sole Dispositive Power        15,432

    Person With                8)  Shared Dispositive Power       3,900

    9)  Aggregate Amount Beneficially Owned by Each Reporting Person  1,230,582*
                                                   * See the response to Item 4.

    10)  Check if the Aggregate Amount in Row (9) Excludes Certain Shares
         See Instructions                                                   [ ]

    11)  Percent of Class Represented by Amount in Row (9)                 10.3*
                                                   * See the response to Item 4.

    12)  Type of Reporting Person   (See Instructions)                     HC


   2



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   ----------
                                  SCHEDULE 13G
                                 (RULE 13D-102)

             INFORMATION STATEMENT PURSUANT TO RULES 13D-1 AND 13D-2
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 18)

                         MINE SAFETY APPLIANCES COMPANY
                         ------------------------------
                                (Name of Issuer)

                                  Common Stock
                                  ------------
                         (Title of Class of Securities)

                                    602720104
                                    ---------
                                 (CUSIP Number)

                                 August 31, 2000
                                 ---------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[X] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

CUSIP No.  602720104                                          Page 2 of 6 Pages

    1)  Names of Reporting Persons
        IRS Identification No. Of Above Persons

            PNC Bancorp, Inc.   51-0326854

    2)  Check the Appropriate Box if a Member of a Group (See Instructions)
          a)  [ ]
          b)  [ ]

    3)  SEC USE ONLY


    4)  Citizenship or Place of Organization    Delaware

    Number of Shares           5)  Sole Voting Power              1,230,582

    Beneficially Owned         6)  Shared Voting Power                  -0-

    By Each Reporting          7)  Sole Dispositive Power            15,432

    Person With                8)  Shared Dispositive Power           3,900

    9)  Aggregate Amount Beneficially Owned by Each Reporting Person  1,230,582*
                                                   * See the response to Item 4.

    10)  Check if the Aggregate Amount in Row (9) Excludes Certain Shares
         See Instructions                                                   [ ]

    11)  Percent of Class Represented by Amount in Row (9)                 10.3*
                                                   * See the response to Item 4.

    12)  Type of Reporting Person   (See Instructions)                     HC


   3



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   ----------
                                  SCHEDULE 13G
                                 (RULE 13D-102)

             INFORMATION STATEMENT PURSUANT TO RULES 13D-1 AND 13D-2
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 18)

                         MINE SAFETY APPLIANCES COMPANY
                         ------------------------------
                                (Name of Issuer)

                                  Common Stock
                                  ------------
                         (Title of Class of Securities)

                                    602720104
                                    ---------
                                 (CUSIP Number)

                                 August 31, 2000
                                 ---------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[X] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

CUSIP No.  602720104                                           Page 3 of 6 Pages

    1)  Names of Reporting Persons
        IRS Identification No. Of Above Persons

            PNC Bank, National Association   22-1146430

    2)  Check the Appropriate Box if a Member of a Group (See Instructions)
          a)  [ ]
          b)  [ ]

    3)  SEC USE ONLY


    4)  Citizenship or Place of Organization    United States

    Number of Shares           5)  Sole Voting Power              1,230,582

    Beneficially Owned         6)  Shared Voting Power                  -0-

    By Each Reporting          7)  Sole Dispositive Power            15,432

    Person With                8)  Shared Dispositive Power           3,900

    9)  Aggregate Amount Beneficially Owned by Each Reporting Person  1,230,582*
                                                   * See the response to Item 4.

    10)  Check if the Aggregate Amount in Row (9) Excludes Certain Shares
         See Instructions                                                   [ ]

    11)  Percent of Class Represented by Amount in Row (9)                 10.3*
                                                   * See the response to Item 4.

    12)  Type of Reporting Person   (See Instructions)                     BK


   4



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   ----------
                                  SCHEDULE 13G
                                 (RULE 13D-102)

             INFORMATION STATEMENT PURSUANT TO RULES 13D-1 AND 13D-2
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 18)

                         MINE SAFETY APPLIANCES COMPANY
                         ------------------------------
                                (Name of Issuer)

                                  Common Stock
                                  ------------
                         (Title of Class of Securities)

                                    602720104
                                    ---------
                                 (CUSIP Number)

                                 August 31, 2000
                                 ---------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[X] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

CUSIP No.  602720104                                           Page 4 of 6 Pages

    1)  Names of Reporting Persons
        IRS Identification No. Of Above Persons

            PNC Bank, FSB   59-2424590

    2)  Check the Appropriate Box if a Member of a Group (See Instructions)
          a)  [ ]
          b)  [ ]

    3)  SEC USE ONLY


    4)  Citizenship or Place of Organization    United States

    Number of Shares           5)  Sole Voting Power              1,230,582

    Beneficially Owned         6)  Shared Voting Power                  -0-

    By Each Reporting          7)  Sole Dispositive Power            15,432

    Person With                8)  Shared Dispositive Power           3,900

    9)  Aggregate Amount Beneficially Owned by Each Reporting Person  1,230,582*
                                                   * See the response to Item 4.

    10)  Check if the Aggregate Amount in Row (9) Excludes Certain Shares
         See Instructions                                                   [ ]

    11)  Percent of Class Represented by Amount in Row (9)                 10.3*
                                                   * See the response to Item 4.

    12)  Type of Reporting Person   (See Instructions)                     BK


   5




                                                               Page 5 of 6 Pages

ITEM 4 - OWNERSHIP:

The following information is as of December 31, 1999:

(a) Amount Beneficially Owned:                                 1,230,582 shares*

(b) Percent of Class:                                                      10.3*

(c) Number of shares to which such person has:
           (i)  sole power to vote or to direct the vote               1,230,582
          (ii)  shared power to vote or to direct the vote                   -0-
         (iii)  sole power to dispose or to direct the disposition of     15,432
         (iv)  shared power to dispose or to direct the disposition of     3,900

         *Of the total shares of Common Stock reported herein, 1,125,000 shares
         are held in a pension plan trust account opened on June 13, 2000 under
         the plan name of "Non-Contributory Pension Plan for Employees of Mine
         Safety Appliances Company." The account was established under that
         certain Trust Agreement dated April 1, 1992 by and between Mine Safety
         Appliances Company and Pittsburgh National Bank (now, PNC Bank,
         National Association) for which PNC Bank, National Association serves
         as Directed Trustee.


ITEM 7 - IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
         THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY:

Included are the following subsidiaries of The PNC Financial Services
Group, Inc. (formerly, PNC Bank Corp.) - HC:

PNC Bancorp, Inc. - HC (wholly owned subsidiary of PNC Bank Corp.)

PNC Bank, National Association - BK (wholly owned subsidiary of PNC
Bancorp, Inc.)

PNC Bank, FSB - BK (wholly owned subsidiary of PNC Bancorp, Inc.)


ITEM 10 - CERTIFICATION:

         By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and held in the ordinary
course of business and were not acquired and are not held for the purpose of or
with the effect of changing or influencing the control of the issuer of the
securities and were not acquired and are not held in connection with or as a
participant in any transaction having that purpose or effect.



   6
                                                               Page 6 of 6 Pages

                                    SIGNATURE

         After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.


September 8, 2000
- -------------------------------
Date

By: /s/ Robert L. Haunschild
   ----------------------------
Signature - The PNC Financial Services Group, Inc. (formerly, PNC Bank Corp.)
Robert L. Haunschild, Senior Vice President and Chief Financial Officer
- -----------------------------------------------------------------------
Name & Title




September 8, 2000
- -------------------------------
Date

By: /s/ James B. Yahner
   ----------------------------
Signature - PNC Bancorp, Inc.
James B. Yahner, Vice President
- -------------------------------
Name & Title




September 8, 2000
- -------------------------------
Date

By: /s/ Thomas R. Moore
   ----------------------------
Signature - PNC Bank, National Association
Thomas R. Moore, Secretary
- -------------------------------
Name & Title




September 8, 2000
- -------------------------------
Date

By: /s/ Thomas R. Moore
   ----------------------------
Signature - PNC Bank, FSB
Thomas R. Moore, Secretary
- -------------------------------
Name & Title




                     AN AGREEMENT TO FILE A JOINT STATEMENT
             WAS PREVIOUSLY FILED AS EXHIBIT A TO AMENDMENT NO. 11.