18 Beacon St -- Boston. 
Jan. 20th, 1877. 

Dear Mr. Hubbard, 

I cannot help writing just to tell you how fast we are progressing with the new form of Telephone. 

By increasing the resistance of the coils -- by converting the cover into a sounding-box -- and by supporting the magnet upon rubber -- we have increased the loudness of the so?nds so much -- that they are audible all over my experimental room. 

The articulation can be distinguished with the ear two feet away from the instrument. Last night two Japanese gentlemen held a conversation in Japanese through the instrument -- and this morning Mr. Watson went to Salem and conversed with me through the wire -- without any battery. 

Not only was the articulation 
