EXHIBIT 4(G)
 
                                          December 15, 1993
 
Bank of Boston Connecticut c/o Bank of Boston Large Corporate New England 100
Federal Street Boston, MA 02110
 
Ladies/Gentlemen:
 
  We refer to the Credit Agreement, dated as of September 30, 1993 ("Credit
Agreement"), among Olin Corporation ("Olin"), Bank of Boston Connecticut,
Chemical Bank, Citibank, N.A., Credit Suisse, Morgan Guaranty Trust Company of
New York, The Boatmen's National Bank of St. Louis and The Chase Manhattan
Bank, N.A.
 
  We refer also to the charge in the amount of $131.8 million after taxes (the
"Charge"), relating to (a) personnel reductions, (b) business restructurings,
(c) environmental exposures, (d) closed sites, and (e) long term disability
(SFAS 112) and miscellaneous asset write-offs proposed to be taken by Olin in
the fourth quarter of 1993.
 
  Kindly confirm below the bank's agreement that, for purposes of calculating
"EBIT", as defined in the Credit Agreement, the Charge shall be excluded from
the determination of net income.
 
                                          Very truly yours,
 
                                          OLIN CORPORATION
 
                                          By  _________________________________
                                               Vice President and Treasurer
 
Confirmed:
 
BANK OF BOSTON CONNECTICUT
 
By  _________________________________
 Name: Title:

 
                                                                    EXHIBIT 4(G)
 
                                          December 15, 1993
 
Chemical Bank 270 Park Avenue New York, NY 10017
 
Ladies/Gentlemen:
 
  We refer to the Credit Agreement, dated as of September 30, 1993 ("Credit
Agreement"), among Olin Corporation ("Olin"), Bank of Boston Connecticut,
Chemical Bank, Citibank, N.A., Credit Suisse, Morgan Guaranty Trust Company of
New York, The Boatmen's National Bank of St. Louis and The Chase Manhattan
Bank, N.A.
 
  We refer also to the charge in the amount of $131.8 million after taxes (the
"Charge"), relating to (a) personnel reductions, (b) business restructurings,
(c) environmental exposures, (d) closed sites, and (e) long term disability
(SFAS 112) and miscellaneous asset write-offs proposed to be taken by Olin in
the fourth quarter of 1993.
 
  Kindly confirm below the bank's agreement that, for purposes of calculating
"EBIT", as defined in the Credit Agreement, the Charge shall be excluded from
the determination of net income.
 
                                          Very truly yours,
 
                                          OLIN CORPORATION
 
                                          By  _________________________________
                                               Vice President and Treasurer
 
Confirmed:
 
CHEMICAL BANK
 
By  _________________________________
 Name: Title:

 
                                                                    EXHIBIT 4(G)
 
                                          December 15, 1993
 
Citibank, N.A. 399 Park Avenue 8th Floor New York, NY 10043
 
Ladies/Gentlemen:
 
  We refer to the Credit Agreement, dated as of September 30, 1993 ("Credit
Agreement"), among Olin Corporation ("Olin"), Bank of Boston Connecticut,
Chemical Bank, Citibank, N.A., Credit Suisse, Morgan Guaranty Trust Company of
New York, The Boatmen's National Bank of St. Louis and The Chase Manhattan
Bank, N.A.
 
  We refer also to the charge in the amount of $131.8 million after taxes (the
"Charge"), relating to (a) personnel reductions, (b) business restructurings,
(c) environmental exposures, (d) closed sites, and (e) long term disability
(SFAS 112) and miscellaneous asset write-offs proposed to be taken by Olin in
the fourth quarter of 1993.
 
  Kindly confirm below the bank's agreement that, for purposes of calculating
"EBIT", as defined in the Credit Agreement, the Charge shall be excluded from
the determination of net income.
 
                                          Very truly yours,
 
                                          OLIN CORPORATION
 
                                          By  _________________________________
                                               Vice President and Treasurer
 
Confirmed:
 
CITIBANK, N.A.
 
By  _________________________________
 Name: Title:

 
                                                                    EXHIBIT 4(G)
 
                                          December 15, 1993
 
Credit Suisse 12 East 49th Street New York, NY 10017
 
Ladies/Gentlemen:
 
  We refer to the Credit Agreement, dated as of September 30, 1993 ("Credit
Agreement"), among Olin Corporation ("Olin"), Bank of Boston Connecticut,
Chemical Bank, Citibank, N.A., Credit Suisse, Morgan Guaranty Trust Company of
New York, The Boatmen's National Bank of St. Louis and The Chase Manhattan
Bank, N.A.
 
  We refer also to the charge in the amount of $131.8 million after taxes (the
"Charge"), relating to (a) personnel reductions, (b) business restructurings,
(c) environmental exposures, (d) closed sites, and (e) long term disability
(SFAS 112) and miscellaneous asset write-offs proposed to be taken by Olin in
the fourth quarter of 1993.
 
  Kindly confirm below the bank's agreement that, for purposes of calculating
"EBIT", as defined in the Credit Agreement, the Charge shall be excluded from
the determination of net income.
 
                                          Very truly yours,
 
                                          OLIN CORPORATION
 
                                          By  _________________________________
                                               Vice President and Treasurer
 
Confirmed:
 
CREDIT SUISSE
 
By  _________________________________
 Name: Title:

 
                                                                    EXHIBIT 4(G)
 
                                          December 15, 1993
 
Morgan Guaranty Trust Company of New York 60 Wall Street New York, NY 10260-
0060
 
Ladies/Gentlemen:
 
  We refer to the Credit Agreement, dated as of September 30, 1993 ("Credit
Agreement"), among Olin Corporation ("Olin"), Bank of Boston Connecticut,
Chemical Bank, Citibank, N.A., Credit Suisse, Morgan Guaranty Trust Company of
New York, The Boatmen's National Bank of St. Louis and The Chase Manhattan
Bank, N.A.
 
  We refer also to the charge in the amount of $131.8 million after taxes (the
"Charge"), relating to (a) personnel reductions, (b) business restructurings,
(c) environmental exposures, (d) closed sites, and (e) long term disability
(SFAS 112) and miscellaneous asset write-offs proposed to be taken by Olin in
the fourth quarter of 1993.
 
  Kindly confirm below the bank's agreement that, for purposes of calculating
"EBIT", as defined in the Credit Agreement, the Charge shall be excluded from
the determination of net income.
 
                                          Very truly yours,
 
                                          OLIN CORPORATION
 
                                          By  _________________________________
                                               Vice President and Treasurer
 
Confirmed:
 
MORGAN GUARANTY TRUST COMPANY
 OF NEW YORK
 
By  _________________________________
 Name: Title:

 
                                                                    EXHIBIT 4(G)
 
                                          December 15, 1993
 
The Boatmen's National Bank of St. Louis 800 Market Street St. Louis, MO 63101
 
Ladies/Gentlemen:
 
  We refer to the Credit Agreement, dated as of September 30, 1993 ("Credit
Agreement"), among Olin Corporation ("Olin"), Bank of Boston Connecticut,
Chemical Bank, Citibank, N.A., Credit Suisse, Morgan Guaranty Trust Company of
New York, The Boatmen's National Bank of St. Louis and The Chase Manhattan
Bank, N.A.
 
  We refer also to the charge in the amount of $131.8 million after taxes (the
"Charge"), relating to (a) personnel reductions, (b) business restructurings,
(c) environmental exposures, (d) closed sites, and (e) long term disability
(SFAS 112) and miscellaneous asset write-offs proposed to be taken by Olin in
the fourth quarter of 1993.
 
  Kindly confirm below the bank's agreement that, for purposes of calculating
"EBIT", as defined in the Credit Agreement, the Charge shall be excluded from
the determination of net income.
 
                                          Very truly yours,
 
                                          OLIN CORPORATION
 
                                          By  _________________________________
                                               Vice President and Treasurer
 
Confirmed:
 
THE BOATMEN'S NATIONAL BANK
 OF ST. LOUIS
 
By  _________________________________
 Name: Title:

 
                                                                    EXHIBIT 4(G)
 
                                          December 15, 1993
 
The Chase Manhattan Bank, N.A. One Chase Plaza New York, NY 10081
 
Ladies/Gentlemen:
 
  We refer to the Credit Agreement, dated as of September 30, 1993 ("Credit
Agreement"), among Olin Corporation ("Olin"), Bank of Boston Connecticut,
Chemical Bank, Citibank, N.A., Credit Suisse, Morgan Guaranty Trust Company of
New York, The Boatmen's National Bank of St. Louis and The Chase Manhattan
Bank, N.A.
 
  We refer also to the charge in the amount of $131.8 million after taxes (the
"Charge"), relating to (a) personnel reductions, (b) business restructurings,
(c) environmental exposures, (d) closed sites, and (e) long term disability
(SFAS 112) and miscellaneous asset write-offs proposed to be taken by Olin in
the fourth quarter of 1993.
 
  Kindly confirm below the bank's agreement that, for purposes of calculating
"EBIT", as defined in the Credit Agreement, the Charge shall be excluded from
the determination of net income.
 
                                          Very truly yours,
 
                                          OLIN CORPORATION
 
                                          By  _________________________________
                                               Vice President and Treasurer
 
Confirmed:
 
THE CHASE MANHATTAN BANK, N.A.
 
By  _________________________________
 Name: 
 Title: