Collins, A. Frederick (Archie Frederick), 1869- · Boston, Small, Maynard and company · leaf 22
ing avacuum in the cylinder, and the pressure of theair on the piston forced it down again. Although this engine of Papins was intendedto work half by steam and half by air pressure itwas called an atmospheric engine and this is thename it has always been known by. The First Engines 7 Newcomen… … Fig. 4. Newcomers Improved Engine was separate and distinct from the cylinder.The piston in the cylinder was connected by arod to one end of a lever called a walking beamand a weight to balance it was hung on the otherend of the beam as shown in Fig. 4. When steam was admitted into the cylinderfrom…
Steam-engines
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![An illustration from M. Vitrvvii viri svae professionis pertissimi De architectvra libri decem, ad Avgvstum Cæsarem accuratiss. conscripsit & nvnc primvm in Germania qva potuit diligentia excusi, atq[ue] hinc inde schematibus non iniucundis exornati (1543)](https://img.insideoutlibrary.com/img/200/ia-mvitrvviivirisva00vitr-295-99@270.webp)
