WATER--AERATION.
 
SPECIAL COLLECTIONS Wicwall, H. M., firm, Boston.
SCbH Aerifying chain of cups. Wonderful and highly . F869 important results are produced by this new and 055 ingenious arrangement, devised and patented by
A. H. Knapp ... Boston, Wright & Potter [1869]. broadside. 24.5x20cm. From a collection of fliers distributed at the Massachusetts Charitable Mechanic Association's Eleventh Exhibition, 1869.
1. Pumping machinery--Catalogs. 2. Advertising
fliers--Massachu setts--Boston. 3. Broad- sides--U.S. 2 hy Water--Aeration. I. Knapp, A Hs MB