Exhibit 10.7


     NATIONAL BANK OF CANADA

                      ACKNOWLEDGMENT OF DEBT
                     REVOLVING DEMAND CREDIT
                                 

In consideration of the National Bank of Canada (thereinafter
called the "Bank") providing the undersigned thereinafter called
the "Customer") with a revolving demand loan facility
(thereinafter called the "Loan Facility") in the aggregate
principal amount, not exceeding $ 900,000.00                      
    ,        Nine Hundred
Thousand______________________________________________________________________
__________________________xx dollars (x CDN: / / CDN or US Equivalent: / / US)
the customer agrees with the following::

1.  TERMS OF CREDIT
    The customer promises to pay the Bank, on demand, all amounts outstanding 
    under this Loan Facility including, without limitation, principal, interest,
    fees and accessories.

2.  INTEREST RATE  
X   2.1  Advances in CDN$
         Advances in CDN$ shall bear interest, until payment in full, at the 
         Canadian Prime Rate of the Bank plus    1.00    per cent, calculated 
         daily and payable monthly, with a minimum charge of $    10.00      . 
         At the date hereof the Canadian Prime Rate of the Bank is            
         per cent per annum.

/ / 2.2  Advances in US$
         Advances in US$ shall bear interest, until payment in full, at the US 
         Base Rate of the Bank plus            per cent, calculated daily and 
         payable monthly, with a minimum charge of $             . At that date
         hereof the US Base Rate of the Bank is              Per cent per annum.

3.   FINANCING CONDITIONS
    3.1  The Customer authorizes the Bank, but the Bank is not obliged, to debit
         from time to time his Account with the amount of interest accrued and 
         unpaid by the Customer.

    3.2  Provided that the Bank has not demanded payment of any amount 
         outstanding under this Loan Facility, or has not terminated this 
         Agreement, the Customer may, at the Bank's discretion, borrow, repay
         and reborrow up to the amount available under this Loan Facility at
         any time and from time to time in the following manner:  

          3.2.1    The Customer authorizes the Bank, daily or otherwise as and 
                   when determined by the Bank from time to time, to ascertain 
                   the position or net position (as the case may be) between 
                   the Customer and the Bank in respect to the deposit account 
                   or, if more than one, the deposit accounts maintained by the
                   Customer with the Bank (herein called the "Account") and that

                   3.2.1.1   If such position or net position is a credit in 
                             favour of the Customer, the Bank may apply the
                             amount of such credit or any part thereof, rounded
                             to the nearest $ 15,000.00 as a repayment of the
                             Loan Facility, and the Bank will debit the Account 
                             with the amount of such repayment; and

                   3.2.1.2   If such position or net position is a debit in 
                             favour of the Bank, the Bank will make an advance
                             under the Loan Facility of such amount, rounded to 
                             the nearest $15,000.00 as is required to place the 
                             Account in such credit or net credit position as 
                             has been agreed between the customer and the Bank 
                             from time to time, and the Bank may increase the 
                             unpaid balance owing under the Loan Facility, and 
                             credit the Account with the amount of such advance:

                   provided that at no time shall the balance owing
                   exceed the amount of the Loan Facility.

    3.3  The Customer agrees to maintain an average monthly minium credit 
         balance in the Account, which may include compensating balances to 
         cover service charges, reserves and debit float. Such balance shall 
         be the amount agreed to in writing between the Customer and the Bank
         from time to time.

    3.4  The Bank shall maintain on the books of its unit of account, 
         accounts and records evidencing the outstanding principal amount of 
         the loan of the Bank to the Customer under this Loan Facility  
         together with any interest in respect thereof. The Bank shall 
         maintain a record or computerized data of the amount of the 
         balance, each advance, and each payment of principal and interest 
         on account of the loan. The Bank's accounts and  records constitute 
         in the absence of manifest 





         error prima facie evidence of the indebtedness of the Customer to the 
         Bank under this Loan Facility. 

4.  CONSOLIDATION
     
    4.1  The Customer acknowledges that the outstanding principal balance 
         owing to the Bank under existing credit facilities which will be 
         replaced by this Loan Facility is $                            , 
                                                                 dollars, 
         as at the close of business on 19  .  The initial outstanding
         principal balance under this Loan Facility will be adjusted to 
         reflect transactions under the existing credit facility occurring 
         between                    19   and the date of execution of this 
         agreement. The Customer acknowledges and declares that the security 
         previously granted to the Bank by the Customer remains in full 
         force and effect.  The Bank hereby reserving all of its rights, 
         title and interest to and in the rights, hypothecs and privileges 
         granted to the Bank under the terms of said security.

5.  SECTION 427 OF THE BANK ACT


    5.1  This Agreement is given pursuant to the application for credit and 
         promise to give security made by the undersigned to the Bank and 
         dated the 17th day of June 1996, and any supplemental application 
         for credit and promise to give security.  The Customer promises to 
         give the Bank from time to time warehouse receipts and/or bills of 
         lading covering the property described in such application(s) for 
         credit and promise(s) to give security or any part thereof which is 
         now or may hereafter be covered by warehouse receipts or bills of 
         lading, as security for this Loan Facility.  No such security shall 
         be merged in any subsequent security or be taken to be substituted 
         for any security previously acquired.  This section applies only to 
         loans granted under the provisions of the Bank Act.

6.  INTERPRETATION

    6.1  Definitions
         For the purposes hereof, the following words and phrases shall have 
         the following meaning:

         "Canadian Dollars" "CDN$": means lawful money of Canada.

         "Canadian Prime Rate": means the annual variable rate of interest 
         announced from time to time by the Bank and used to determine the 
         interest rates on Canadian dollar commercial loans granted by the 
         Bank in Canada.

         "Debt", "Indebtedness" or "total indebtedness": means the aggregate 
         amount of principal, interest and accessories due by the Customer 
         hereunder.

         "Floating Rate": means the interest rate applicable to floating rate 
         advances made hereunder in Canadian or U.S. dollars, as the case 
         may be.

         "U.S. Base Rate": means the annual variable rate of interest 
         announced from time to time by the Bank and used to determine the 
         interest rates on U.S. dollar commercial loans granted by the Bank 
         in Canada.

         "U.S. Dollars" "US$": means lawful money of the United States of 
         America.

    6.2  Conversion to U.S. or Canadian dollars

         Each time an amount in Canadian dollars must be converted or 
         expressed in U.S. dollars, or the equivalent in U.S. dollars (or 
         inversely) must be determined, such calculation shall be made, on 
         the appropriate date, in accordance with the cash purchase rate of 
         the Bank at about 10:30 a.m.

         6.3  Other Agreements

         The Customer acknowledges that the terms of this agreement are in 
         addition to and not in substitution for any terms and conditions of 
         any other agreements between the Customer and the                
         Bank.

    7.   GENERAL TERMS AND CONDITIONS OF REPAYMENT    


         7.1  Currency and place of payment

              All amounts due by the Customer under the terms hereof shall be 
              paid by the Customer to the Bank in Canadian dollars in the case 
              of a 

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              financing granted in Canadian dollars, or in U.S. dollars in the 
              case of a financing granted in U.S. dollars.

              Should the amount of principal of the debt owing to the Bank 
              exceed the credit limit effectively granted hereunder, the 
              Customer shall reimburse the Bank, on demand, an amount equal to 
              such excess amount.

         7.2  Judgment rendered in a currency other than the currency in which 
              the financing granted was due 

              Should a judgment be obtained against the Customer for an 
              amount owned by it, in a currency other than the one in which 
              the said amount was owing hereunder, the Customer shall pay the 
              Bank, as applicable, on the judgment date, such additional 
              amount as is equal to the excess of the amount that was due 
              hereunder and converted into the other currency, on the 
              judgment payment date, with respect to the judgment amount.  
              The exchange rate applicable for the purposes of obtaining the 
              judgment and for calculating said conversion shall be the rate 
              at which the Bank is able, on the appropriate date, in Montreal 
              to sell the currency applicable to this agreement to purchase 
              the other currency.

              Any additional amount owing, under this clause
              shall be due as a separate debt from that which
              gave rise to the judgment, which judgment shall
              not constitute resjudicata.

    8.   LANGUAGE

         The Customer has expressly requested that this document be drawn up and
         executed in the English language. 


    EXECUTED AT TORONTO THIS 25TH  DAY OF APRIL, 1997



                                        Per:   /S/
     --------------------------------       --   -----------------------------
     SIGNATURE (Bank)                              SIGNATURE (Customer)


          
                                        
                                        Per:   /S/
                                            --   -----------------------------
                                                   SIGNATURE (Customer)







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