WILLIAM B. DE LAS CASAS, 



EDWIN U. CURTIS. 

 DAVID N. SHILLINGS. 

 ELLERTON P. WHITNEY. 

 EVERETT C. BENTON. 



GEO. LYMAN ROGERS, 



THE COMMONWEALTH OF MASSACHUSETTS. 



METROPOLITAN PARK COMMISSION, 



CONGREGATIONAL HOUSE, 14 BEACON STREET, 



Boston, y < a y i 6 > 1913. 



(G.O.-Gn) 



Mr. Walter Deane, 



29 Brewster Street, 



Cambridge, Mass. 



Dear Sir: - 



In reply to your letter of May 12th would say I do not know how 

 you could get a complete set of Charles River Easin Commission reports un- 

 less you could possibly pick them up at a second-hand bookstore. 



In answer to your enquiry relative to the freshness of the water in 

 Charles River Basin opposite the Cambridge Cemetery, I would pay that an 

 average of fifteen analyses made of the water in the Easin at Western Avenue 

 Bridge in 1912 showed 32 parts chlorine in every 100,000 on the surface, and 

 on the bottom 54 parts chlorine to 100,000. This is practically fresh water. 

 The analyses at North Beacon Bridge made even a better showing. 



Very truly yours, 



