EXHIBIT 99.1
NEWS RELEASE                                   SLH CORPORATION
                                               5000 W. 95th Street, Suite 260
                                               Shawnee Mission, KS 66207
                                               Phone: (913) 652-1000
                                               Fax:   (913) 652-1025
FOR IMMEDIATE RELEASE:

March 31, 1998

Contacts:       Steve Fitzwater              John Ford
                Kim Schaefer                 Syntroleum Corporation
                SLH Corporation              (918) 592-7900
               (913) 652-1000

                           SLH AND SYNTROLEUM TO MERGE

       SHAWNEE  MISSION,  KS AND  TULSA,  OK -  Syntroleum(R)  Corporation,  the
developer and owner of a  proprietary  process for  converting  natural gas into
synthetic  crude  oil,  and  SLH   Corporation   (NASDAQ:   SLHO),   which  owns
approximately  31% of  Syntroleum,  today  announced  that  they  have  signed a
definitive  agreement  to merge the two  companies.  The  transaction,  which is
expected to close near the end of the second  quarter of 1998, has been approved
by the Boards of Directors of both companies.

       In the merger,  all outstanding shares of Syntroleum common stock will be
exchanged for shares of SLH common stock,  all outstanding  shares of SLH common
stock will  remain  outstanding,  the name of SLH will be changed to  Syntroleum
Corporation,  and SLH  management  and six of the  eight SLH  directors  will be
replaced with Syntroleum  management and directors.  James R. Seward,  President
and Chief Executive Officer of SLH, and P. Anthony Jacobs,  Chairman of SLH, who
are  currently  directors  of both  companies,  will remain as  directors of the
merged company.

       Under the merger agreement, each outstanding share of Syntroleum is to be
converted  into a number of SLH shares  equal to an  "implied"  market  value of
Syntroleum  common stock divided by the average market value of SLH common stock
during the five trading days before the SLH meeting of shareholders. The implied
market value of  Syntroleum  common  stock will be SLH's  market  capitalization
minus its March 31, 1998 stockholders' equity divided by the 5,950,000 shares of
Syntroleum  common  stock  that SLH now  owns.  If the  exchange  ratio had been
calculated on SLH's average closing prices for the five trading days ended March
30, 1998,  each of the  13,043,950  shares of Syntroleum  stock not owned by SLH
would be exchanged for 1.47 shares of SLH common stock based on SLH's  estimated
March 31, 1998 stockholder's equity of approximately $50 million. In which case,
SLH stockholders  would own  approximately 34% of the combined company following
the  merger.  Fairness  opinions  on the  exchange  ratio have been  provided by
Salomon Smith Barney to SLH, and by J. P. Morgan to Syntroleum.

       A principal purpose of the merger is to provide Syntroleum with access to
the   approximately  $50  million  of  SLH's  cash  and  other  assets  to  fund
Syntroleum's  capital  commitments  to  a  gas-to-liquids  (GTL)  project  being
developed with Enron Capital & Trade Resources Corp., and a second
GTL project being developed with Texaco,  Inc., and Brown & Root, Inc., as well
as for  continued  research  and  development  of process  improvements  and for
general working capital.

       James R. Seward,  President  and Chief  Executive  Officer of SLH,  said,


"This transaction is a clear vote of confidence by SLH in Syntroleum. One of the
added  benefits  of this  transaction  is that as a public  company,  the global
energy industry and the investment  community will have access to  significantly
more information  about Syntroleum,  its technology,  its business model and the
benefits of joining its growing  network of  industry  partners  and  licensees,
which now include  Texaco,  Atlantic  Richfield  Company ("ARCO" ), Marathon Oil
Company, an affiliate of Yacimientos Petroliferos Fiscales, S.A. ("YPF"), Enron,
Kerr-McGee Corporation,  Brown & Root, Inc., Bateman Engineering, Inc., Lyondell
Petrochemical  Company,  AGC  Manufacturing  Services,  AMEC  Process and Energy
Limited,  ABB  Power  Generation  Ltd.,  Catalytica  Advanced  Technologies  and
Criterion Catalyst Company, L.P."

       "This transaction should enable us to continue the growth and development
of  Syntroleum  and the  Syntroleum  Process,"  said  Mark  Agee,  President  of
Syntroleum.  "We have long  appreciated the tremendous  support we have received
from SLH and are pleased that with the recent favorable  developments at SLH, we
are now able to put our two companies  together.  We believe the  combination of
Syntroleum's  technology  and SLH's  financial  resources  will provide a strong
platform for future growth."

       The transaction is subject to shareholder approvals and customary closing
conditions.  Shareholder  meetings  to  vote  on the  proposed  merger  will  be
scheduled  as  soon as a  registration  statement  becomes  effective  with  the
Securities and Exchange  Commission  ("SEC") and proxy  materials are finalized.
SLH expects to file the registration  statement and preliminary  proxy materials
with the SEC in April and hold  shareholder  meetings near the end of the second
quarter of 1998.

       SLH is primarily  engaged in promoting the  development of Syntroleum and
is also in the business of managing,  developing  and  disposing of certain real
estate and miscellaneous assets.

       THE OFFERING OF SLH COMMON STOCK IN CONNECTION  WITH THE MERGER WILL ONLY
BE MADE BY  MEANS  OF A  PROSPECTUS.  ACCORDINGLY,  THIS  PRESS  RELEASE  IS NOT
INTENDED TO CONSTITUTE AN OFFER TO SELL OR THE  SOLICITATION  OF AN OFFER TO BUY
ANY SUCH SECURITIES.

This  document  contains  forward-looking   statements  as  well  as  historical
information. Forward-looking statements are identified by or are associated with
such words as "intend," "believe," "estimate," "expect," "anticipate," "should,"
"hopeful"  and  similar  expressions.  They  reflect  management's  beliefs  and
estimates of future  economic  circumstances  and industry  conditions,  Company
performance and financial results and are not guarantees of future  performance.
In  particular,  all  statements  relating  to GTL plants  using the  Syntroleum
Process  are  based on  Syntroleum's  experience  in  operating  a pilot  plant,
laboratory data and numerous engineering  feasibility studies, and no assurances
can be given that  commercial-scale GTL plants using the Syntroleum Process will
achieve similar  results.  Although the Company  believes that the  expectations
reflected  in any  forward-looking  statements  are  reasonable,  it can give no
assurance that such  expectations  will be met. These and other  forward-looking
statements are based on many  assumptions  and factors,  all of which may not be
detailed in this  document.  Any  changes in the  assumptions  or factors  could
produce materially different results than those predicted and could impact stock
values.

  (R)Syntroleum is both a service mark and trademark of Syntroleum Corporation.

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