EXHIBIT 10.42
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                          CONSULTING SERVICES AGREEMENT
                          -----------------------------

     THIS  CONSULTING  SERVICES  AGREEMENT  (the  "AGREEMENT")  entered  into on
September ___, 2001, (hereinafter the "EFFECTIVE DATE"), by and between CELERITY
SYSTEMS,  INC., a Delaware  corporation (the "COMPANY"),  and YORKVILLE ADVISORS
MANAGEMENT, LLC, a Delaware limited liability company (the "CONSULTANT").

     Company  desires to retain the  services of  Consultant  as an  independent
contractor to provide certain consulting and advisory services designated below,
and  Consultant  desires to accept such  engagement by Company,  pursuant to the
terms and conditions of this Agreement.

     In consideration of the representations,  warranties,  mutual covenants and
agreements set forth herein, the parties agree as follows:

     1. SCOPE OF SERVICES

        a.  DUTIES AND  PERFORMANCE.  From time to time  during the term of this
Agreement,  Consultant  shall  provide such  advisory  services  relating to the
Company's  financial status and capital structure (the "SERVICES") to Company as
Consultant and Company shall agree. In connection with the Services,  Consultant
may develop and  communicate  to Company  certain  business  opportunities  with
entities  known  to  Consultant;  the  Services  may  include  various  types of
arrangements, including direct investment into Company.

        b.  INDEPENDENT  CONTRACTOR STATUS. The parties agree that Consultant is
an independent  contractor  performing Services hereunder and not an employee of
Company.  Consultant may use  contractors or other third parties of Consultant's
choice to assist Consultant in rendering such Services.  Unless otherwise agreed
by  Company in  writing,  Consultant  shall be  responsible  for  payment of all
compensation or expenses payable or reimbursable to such third parties.  Nothing
herein or in the  performance  hereof  shall  imply  either a joint  venture  or
principal  and agent  relationship  between the  parties,  nor shall either such
relationship be deemed to have arisen under this Agreement.

     2. COMPENSATION AND EXPENSES

        a.  FINDER'S  FEE;  NOT A BROKER.  For the  services  described  herein,
Company shall pay the Consultant a cash fee of $184,800.

        b.  EXPENSE  REIMBURSEMENT.  While this Agreement is in effect,  Company
shall pay for or reimburse  Consultant for all reasonable and itemized  business
expenses incurred by Consultant directly related to the services to be performed
by Consultant under this Agreement.  Consultant shall keep accurate and detailed
records  of such  expenses  and  submit  expense  reports  along  with  relevant
documentation  in accordance with the expense  reimbursement  policy of Company.
Company  shall pay or  reimburse  Consultant  for all  reasonable  out-of-pocket
expenses  actually  incurred or paid by  Consultant  in the course of performing



services as required hereunder;  provided, that any individual expense in excess
of five hundred dollars ($500.00) must be approved in advance by Company.

        c.  NON-CIRCUMVENTION.  Company  represents  and  warrants  that Company
shall  take no  action  which  shall  result  in  Company  and  any  third-party
introduced to Company,  directly or  indirectly,  by Consultant  consummating  a
relationship  or  transaction  with  Company  without  the   participation   and
compensation of Consultant.  In the event  Consultant  brings an action or seeks
counsel to  enforce  the  provisions  of this  Section  2(c),  Company  shall be
responsible for all fees and expenses incurred by Consultant  including fees and
expenses of any appeal or collection of any judgment.

     3. INDEMNIFICATION

     EXHIBIT  A  attached   hereto  and  made  a  part  hereof  sets  forth  the
understanding of the parties with respect to the indemnification and exculpation
of Consultant.  The  provisions of EXHIBIT A shall  survive,  and remain in full
force and effect after, the termination of this Agreement until fully performed.

     4. TERM AND TERMINATION

     The initial term of this Agreement shall be for a period  commencing on the
Effective  Date hereof and ending on the second  (2nd) year  anniversary  of the
date of this Agreement.  Either party may terminate this Agreement without cause
or  without  the  necessity  of  specifying  cause by giving  written  notice of
termination  to the  other  party.  This  Agreement  shall  terminate  upon  its
expiration or upon receipt of this notice of termination by the  non-terminating
party.  Notwithstanding  the termination of this Agreement,  Sections 2, 3 and 5
shall continue in force and effect and shall survive any such termination.

     5. MISCELLANEOUS

        a.  NOTICE. All notices and other  communications  hereunder shall be in
writing  and  delivered  by Federal  Express or any other  generally  recognized
overnight delivery service,  or by hand, to the appropriate party at the address
on record or to such other address as a party indicates in a notice to the other
party delivered in accordance with this Section.

        b.  SEVERABILITY.  Should one or more  provisions  of this  Agreement be
held  unenforceable,  for whatever cause,  the validity of the remainder of this
Agreement shall remain unaffected.  The parties shall, in such event, attempt in
good faith to agree on new  provisions  which best  correspond  to the object of
this Agreement.

        c. ENTIRE AGREEMENT. The parties have entered into this Agreement after
negotiations and discussions,  an examination of its text, and an opportunity to
consult counsel. This Agreement constitutes the entire understanding between the
parties  regarding to specific  subject  matter covered  herein.  This Agreement
supersedes any and all prior written or oral contracts or understandings between
the  parties  hereto  and  neither  party  shall be bound by any  statements  or
representations  made  by  either  party  not  embodied  in this  Agreement.  No
provisions herein contained shall be waived,  modified or altered,  except by an
instrument in writing, duly executed by the parties hereto.



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        d. GOVERNING LAW. This Agreement  shall be governed by and construed in
accordance with the laws of the State of New York,  without giving effect to any
choice of law of conflict of law  provision or rule  whether  such  provision or
rule is that of New  York or any  other  jurisdiction.  Each  party  irrevocably
consents  to the  exclusive  personal  jurisdiction  of New  York  State  courts
situated in the county in which Consultant is located in New York, or the United
States District Court, or the Southern  District of New York, in connection with
any action,  suit or proceeding  relating to or arising out of this Agreement or
any of the transactions or relationships contemplated hereby. Each party, to the
maximum extent permitted by law, hereby waives any objection that such party may
now have or hereafter  have to the  jurisdiction  of such courts on the basis of
inconvenient  forum  or  otherwise.  Each  party  waives  trial  by  jury in any
proceeding that may arise with respect to this Agreement.

        e. NO IMPLIED WAIVERS. No delay or omission by either party to exercise
its rights and  remedies in  connection  with the breach or default of the other
shall  operate as or be  construed  as a waiver of such rights or remedies as to
any subsequent breach.

        f. COUNTERPARTS.  This  Agreement  may be  executed  in any  number  of
counterparts,  but all  counterparts  hereof shall  together  constitute but one
agreement.  In proving this  Agreement,  it shall not be necessary to produce or
account for more than one counterpart signed by both of the parties.

        g.  BINDING NATURE. This Agreement shall be binding upon and shall inure
to the benefit of the successors  and assigns of the respective  parties to this
Agreement.

        h.  CAPACITY.  Company represents to Consultant that each person signing
this  Agreement on its behalf has the full right and  authority to do so, and to
perform its obligations under this Agreement.

        i.  ATTORNEYS'  FEES. In the event of any litigation or other proceeding
arising out of or in connection  with this  Agreement,  the prevailing  party or
parties shall be entitled to recover its or their reasonable attorneys' fees and
court costs from the other party or parties.

        j. CAPTIONS. The captions appearing in this Agreement are inserted only
as a matter of  convenience  and for  reference  and in no way define,  limit or
describe the scope and intent of this Agreement or any of the provisions hereof.

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          IN WITNESS  WHEREOF,  the parties hereto have caused this Agreement to
be duly executed as of the Effective Date.

YORKVILLE ADVISORS                      CELERITY SYSTEMS, INC.
MANAGEMENT, LLC

By:                                     By:
      ------------------------------        ------------------------------
Name:                                   Name:  Kenneth D. Van Meter
      ------------------------------    Title: President
Title:
      ------------------------------






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                                    EXHIBIT A
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     The  Company  will  indemnify  and hold  harmless  the  Consultant  and its
affiliates  and  their  respective  directors,  members,  officers,  agents  and
employees  and  each  other  person  controlling  the  Consultant  or any of its
affiliates  for any losses (i)  related to or arising out of (A) oral or written
information  provided  by  the  Company  to  the  Consultant,  the  Consultant's
employees  or other  agents or (B) any other  action  or  failure  to act by the
Consultant,  its members,  officers, agents or employees or by the Consultant or
any other  indemnified  party at the  Company's  request  or with the  Company's
consent,  or  otherwise  related to or arising  out of the  consulting  services
provided  or  to be  provided  by  the  Consultant  under  this  Agreement  (the
"ENGAGEMENT") or any transaction or conduct in connection therewith, except that
this  clause  (ii) shall not apply with  respect to any losses  that are finally
judicially  determined  to have  resulted  from the gross  negligence or willful
misconduct of such indemnified party.

     If the foregoing  indemnity is unavailable to any indemnified party for any
reason,  the Company will  contribute to any losses related to or arising out of
the Engagement or any transaction or conduct in connection therewith as follows.
With  respect  to  such  losses  referred  to in  clause  (i) of  the  preceding
paragraph,  each of the  Company and the  Consultant  shall  contribute  in such
proportion  as is  appropriate  to reflect the  relative  benefits  received (or
anticipated  to be  received)  by the  Consultant  on the one  hand,  and by the
Company and its security holders, on the other hand, from the actual or proposed
transaction arising in connection with the Engagement. With respect to any other
losses,  and for losses referred to in clause (i) of the preceding  paragraph if
the allocation provided by the immediately preceding sentence is unavailable for
any reason,  each of the Company and the  Consultant  shall  contribute  in such
proportion as is  appropriate  to reflect not only the relative  benefits as set
forth above,  but also the relative fault of each the Company and the Consultant
in connection with the actions, omissions or other conduct that resulted in such
losses,  as  well  as any  other  relevant  equitable  considerations.  Benefits
received (or anticipated to be received) by the Company and its security holders
shall be deemed to be equal to the  aggregate  cash  consideration  and value of
securities or any other property payable, issuable, exchangeable or transferable
in such  transaction  or  proposed  transaction,  and  benefits  received by the
Consultant shall be deemed to be equal to the  compensation  paid by the Company
to the Consultant in connection  with the Engagement  (exclusive of amounts paid
for  reimbursement  of expenses or paid under this  Agreement).  Relative  fault
shall be determined  by reference  to, among other  things,  whether any alleged
untrue statement of omission or any other alleged conduct relates to information
provided  by the  Company or other  conduct  by the  Company  (or the  Company's
employees or other agents), on the one hand, or by the Consultant,  on the other
hand. The parties agree that it would not be just and equitable if  contribution
were determined by pro rata allocation or by any other method of allocation that
does not  take  account  of the  equitable  considerations  referred  to  above.
Notwithstanding anything to the contrary above, in no event shall the Consultant
be  responsible  for any  amounts  in excess of the  amount of the  compensation
actually paid by the Company to the Consultant in connection with the Engagement
(exclusive  of amounts  paid for  reimbursement  of  expenses or paid under this
Agreement).

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     The Company agrees that it will not,  without prior written  consent of the
Consultant,  settle any pending or threatened claim or proceeding  related to or
arising out of the  Engagement or any actual or proposed  transactions  or other
conduct  in  connection   therewith  (whether  or  not  the  Consultant  or  any
indemnified party is a party to such claim or proceeding) unless such settlement
includes a provision  unconditionally  releasing the  Consultant  and each other
indemnified  party from,  and holding all such  persons  harmless  against,  all
liability in respect of claims by any releasing  party related to or arising out
of the Engagement or any  transactions or conduct in connection  therewith.  The
Company will also promptly  reimburse  each  indemnified  party for all expenses
(including  counsel fees and expenses) as they are incurred by such  indemnified
party in connection with investigating,  preparing for, defending,  or providing
evidence in, any pending or threatened claim or proceeding related to or arising
out of the engagement or any actual or proposed  transaction or other conduct in
connection  therewith  or  otherwise  in  respect  of which  indemnification  or
contribution may be sought hereunder (whether or not the Consultant or any other
indemnified  party is a party to such claim or  proceeding) or in enforcing this
Agreement.

     The Company further agrees that the Consultant shall not have any liability
(whether direct or indirect, in contract or tort or otherwise) to the Company or
any of  the  Company's  affiliates,  creditors  or  security  holders  for or in
connection  with the Engagement or any actual or proposed  transactions or other
conduct in connection  therewith  except for losses incurred by the Company that
are finally judicially  determined to have resulted from the gross negligence or
willful misconduct of the Consultant.

     The  provisions  set forth above shall  remain in full force and effect and
shall survive the completion or termination of the Engagement.


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