UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 1)*

                       Integrated Measurement Systems Inc.
                                (Name of Issuer)

                                  Common Stock
                         (Title and Class of Securities)

                                    457923100
                                 (CUSIP Number)


                                November 30, 1998

             (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)

*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
disclosures provided in a prior cover page.

The information required on 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 of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).






                                  SCHEDULE 13G

CUSIP No. 457923100                                                  Page 2

1        NAMES OF REPORTING PERSONS
         I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (entities only)

                  Invista Capital Management, Inc.

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
                  Iowa

         NUMBER OF         5           SOLE VOTING POWER
         SHARES
         BENEFICIALLY      6           SHARED VOTING POWER           756,400
         OWNED BY
         EACH              7           SOLE DISPOSITIVE POWER
         REPORTING
         PERSON            8           SHARED DISPOSITIVE POWER      756,400
         WITH

9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                   756,400

10       CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
         SHARES (See Instructions)

11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
                   10.18%

12       TYPE OF REPORTING PERSON (See Instructions)
                  IA













SCHEDULE 13G

CUSIP No. 457923100                                                 Page 3

1        NAMES OF REPORTING PERSONS
         I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (entities only)

                   Principal Life Insurance Company

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
                  Iowa

         NUMBER OF           5           SOLE VOTING POWER
         SHARES
         BENEFICIALLY        6           SHARED VOTING POWER       756,400
         OWNED BY
         EACH                7           SOLE DISPOSITIVE POWER
         REPORTING
         PERSON              8           SHARED DISPOSITIVE POWER  756,400
         WITH

9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                  756,400

10       CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
         SHARES (See Instructions)

11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
                  10.18%

12       TYPE OF REPORTING PERSON (See Instructions)
                  HC






                                                                       Page 4
Item 1(a)  Name of Issuer:

                       Integrated Measurement Systems Inc.

Item 1(b)  Address of Issuer's Principal Executive Offices:

           9525 SW Gemini Drive
           Beaverton, OR 97008

Item 2(a)  Name of Person Filing:

          Invista Capital Management, Inc.
          Principal Life Insurance Co.

Item 2(b)  Address of Principal Business Office, or Residence:

Invista Capital Management, Inc.    Principal Life Ins. Co.
699 Walnut                          711 High Street
1800 Hub Tower                      Des Moines, IA   50392-0088
Des Moines, IA  50309


Item 2(c)  Citizenship:

           Invista Capital Management, Inc. - State of Iowa
           Principal Life Insurance Co. - State of Iowa


Item 2(d)  Title of Class of Securities:

          Common Stock


Item 2(e) CUSIP Numbers:

           457923100


Item 3. If  this  statement  is  filed  pursuant  to  section  240.13d-  1(b) or
240.13d-2(b) or (c), check whether the person filing is a:

         (e)      [X]  An  investment   adviser  in   accordance   with  section
                  240.13d-1(b)(1)(ii)(E).

Item 4.  Ownership:

(a)   Amount Beneficially Owned ..................

  756,400 Shares Common Stock presently held by Invista Cap. Mgmt.
  756,400  Shares Common Stock presently held by Principal Life








                                                                      Page 5

(b) Percent of Class .....

         10.18%     Invista Capital Management, Inc.
         10.18%     Principal Life Insurance Co.

(c) Number of shares as to which the person has:

     (i)  Sole Power to Vote or Direct the Vote

   0 Invista Cap. Mgmt.
   0 Principal Life

         (ii) Shared Power to Vote or Direct the Vote

  756,400 Shares Common Stock presently held by Invista Cap. Mgmt.
  756,400  Shares Common Stock presently held by Principal Life


         (iii) Sole Power to Dispose or to Direct the Disposition of

  0 Invista Cap. Mgmt.
  0 Principal Life

         (iv) Shared Power to Dispose or to Direct the Disposition of

  756,400 Shares Common Stock presently held by Invista Cap. Mgmt.
  756,400  Shares Common Stock presently held by Principal Life



Item 5.  Ownership of Five Percent or Less of a Class
                  N/A

Item 6.  Ownership of More than Five Percent on Behalf of Another Person

     Persons  other than the  reporting  persons  have a right to receive or the
power to direct the receipt of dividends  from or the proceeds  from the sale of
such securities.  The interest of no such person having such an interest relates
to more than five percent of the class.

Item 7.  Identification and Classification of the Subsidiary Which Acquired
         the Security Being Reported on By the Parent Holding Company

                  Previously filed with Schedule 13G.





                                                                      Page 6

Item 8. Identification and Classification of Members of the Group

                  N/A

Item 9. Notice of Dissolution of Group

                  N/A

Item 10(b). Certification

     By signing  below I certify,  to the best of my knowledge  and belief,  the
securities  referred  to above were not  acquired  and are 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.


                                    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.


 INVISTA CAPITAL MANAGEMENT, INC.

By /s/ Lisa M. Smith
Lisa M. Smith, Client Services Representative

PRINCIPAL LIFE INSURANCE COMPANY
By:  INVISTA CAPITAL MANAGEMENT, INC.

By /s/ Lisa M. Smith
Lisa M. Smith, Client Services Representative

Dated this 10th day of December, 1998