Securities and Exchange Commission
Washington, D.C.  20549

Schedule 13G/A

Under the Securities and Exchange Act of 1934
(Amendment No.   )*

MINERALS TECHNOLOGIES, INC (Name of Issue)

COMMON

(Title of Class of Securities)

603158106
 (Cusip number)

Check the following box if a fee is being paid with this
statement [   ].  (A fee
is not required only if the filing person: (1) has a
previous statement on file
reporting beneficial ownership of more than five percent of
the class of
securities described in Item 1; and (2) has filed no
amendment subsequent
thereto reporting beneficial ownership of five percent or
less of such class)
(See Rule 13d-7).

*The remainder of this cover page shall be filled out for a
reporting person's
initial filing on this form with respect to the subject
class of securities, and
for any subsequent amendment containing information which
would alter the
disclosure provided in a prior cover page.

The information required in the remainder of this cover page
shall not be deemed
to be "filed" for the purpose of Section 18 of the
Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities in that
section of the Act
but shall be subject to all other provisions of the Act
(however, see the
Notes).


(Continued on the following page(s)

Cusip Number:  603158106                               13G/A


1.   Investment Advisers, Inc.
2.   Check the appropriate box if a member of a group:
(a)
[   ]  (b) [ X ]
3.   SEC Use only
4.   Citizenship or place of organization:
Delaware
5.   Sole voting power: 727,100
6.   Shared voting power:  177,050
7.   Sole Dispositive power: 727,100
8.   Shared dispositive power: 177,050
9.   Aggregate amount beneficially owned by each reporting
person:  904,150
10.  Percent of class represented by amount in Row 9:
4.01% 11.  Type of Person Reporting*:  IA

Item 1.   (a)  Name of Issuer:  MINERALS TECHNOLOGIES, INC
   (b)  Address of Issuer's Principal Executive Offices:
               THE CHRYSLER BUILDING
               405 LEXINGTON AVENUE
               NEW YORK,  NY  10174-1901
Item 2.   (a)  Investment Advisors, Inc.
   (b)  3700 First Bank Place, Box 357, Minneapolis, MN
55440
     (c)  Delaware
     (d)  Title of Class of Securities:  Common
     (e)  Cusip Number:  603158106


Item 3    (e)  Investment Advisor registered under Section
203 of the
          Investment Advisors Act of 1940.

Item 4.   (a)  Amount beneficially owned: 904,150
     (b)  Percent of Class:  4.01%
    (c)  Number of shares as to which such person has:

     (I)  Sole power to vote:  727,100

     (ii) Shared power to vote:  177,050

     (iii)     Sole power to dispose or direct disposition
of: :  727,100

     (iv) Shared power to dispose or direct disposition
of: 177,050

Item 5.        If this statement is being filed to report
the fact that as of
          the date hereof the reporting person has ceased
to be the
          beneficial owner of more than five percent of
the class of
         securities, check the following:  [ X  ]

Item 6.        The shares referred to in this filing are
held by various
          custodian banks for various clients of
Investment Advisors, Inc.
          None of the individual clients or custodian
banks holds more
          than 5% or more of the shares.

Item 7.        Not applicable.

Item 8.        Not applicable.

Item 9.        Not applicable.
Item 10.       Certification

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

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

Date: 9/5/97


/s/  Kelly Thomas Coughlin

Kelly Thomas Coughlin
Vice President
Director of Compliance