Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 292
he air-pump bucket is provided with India-rnbbcr valves, andis worked by Z*, crank on the intermediate shaft. I Z, condenser. Thereare two condensers and two air-pumps, they are located between the cylin-ders and inclined towards each other, one only being represeirted. Tlie ])assagcyy, together… … I
