I have taken some time lately to search through Google Books for historical information on New England breweries. The 1906 report from New Hampshire State Board of Health has provided the best information on types and strength of beer. The gravities range from 1.043 to 1.068, the latter being the highly regarded P.B. Ale from Van Nostrand Brewing Company in Boston. Thirty of seventy-nine samples tested positive for some for of adulteration. All but one of those thirty contained either salicylic acid or sulphorous acid.
