Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 121
Fig. 113. Note.—A wetr is a dam erected across a river to stop and raise thewater, as for the purpose of taking fish, of conveying a stream to a mill, ofmaintaining the water at a level required for navigating it, or for the pur-poses of irrigation. For facilitating the computation of the quantity…
Hydraulic machinery · Pumping machinery
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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)
