00832cam a22002051i 4500 ca 17001172 DLC 20260227111103.0 790924s1848 maua 000 0 eng ca 17001172 (OCoLC)5418699 DLC MHi DLC premarc TH7683.V4 E5 Emerson, Frederick 1788-1857 Communication to the American Academy of Arts and Sciences, relative to a late report on ventilators and chimney-tops / by Frederick Emerson. -- Boston : C. Stimpson, 1848. 12 p., 1 l. : illus. ; 21 1/2 cm. -- Deals with only such portions of the report as in the author's judgement do him injustice by attempting to disprove the originality of a ventilator lately invented and patented by him. 15043 15043