Sentence:  &#91;[https://archive.org/stream/b28773524_0005#page/59/mode/1up page 59]&#93; The <WSD>Emu</WSD>, though not ſo as large as the oſtrich, is only ſecond to it in magnitude. It is by much the largeſt bird in the New Continent; and is generally found to be ſix feet high, meaſuring from its head to the ground. ... &#91;[https://archive.org/stream/b28773524_0005#page/60/mode/1up page 60]&#93; [T]he <WSD>emu</WSD> runs with ſuch a ſwiftneſs, that the fleeteſt dogs are thrown out in the purſuit. 
Meaning of the word marked with <WSD> tags:  A large flightless bird native to Australia, "Dromaius novaehollandiae". (from 18th c.)