Trap net Britannica
![Trap net Britannica](https://cdn.britannica.com/77/123677-050-9B56265E/Fishing-nets-state-Kerala-India.jpg)
![](https://www.researchgate.net/publication/323973051/figure/fig1/AS:619022961897478@1524597983645/4-Traps-used-to-collect-Ptiliidae-3-Window-trap-IBL-2-used-to-collect-general.png)
Traps used to collect Ptiliidae. 3) Window trap IBL-2 used to
![](https://qph.cf2.quoracdn.net/main-qimg-943546a76071725e3b51b43a1c65e401.webp)
How is the vacuum filled after all the oil is extracted from the
![](https://cdn.britannica.com/90/5690-004-DD3C9A4C/shape-peak-width-elution-chromatography-plate-height.jpg)
Chromatography, Definition, Types, & Facts
![](https://www.researchgate.net/publication/302229830/figure/fig1/AS:359387400032258@1462696041816/A-Map-of-Iraq-Encyclopaedia-Britannica-2010-B-The-Tigris-River-inside-Baghdad.png)
1: (A) Map of Iraq (Encyclopaedia Britannica, 2010) (B) The Tigris
Britannica Propaedia, PDF, Atoms
![](https://www.britannica.com/explore/savingearth/wp-content/uploads/sites/4/2019/04/GettyImages-126430463-1024x819.jpg)
Trash Talk: Ghost Fishing Gear, Saving Earth
![](https://cdn.britannica.com/28/194728-131-F1986138/Star-fish-gillnet.jpg)
Talking Ocean Trash: Ghost Gear Keeps on Fishing
![](https://fish-commercial-names.ec.europa.eu/fish-names/javax.faces.resource/images/gears/104.jpg.xhtml)
Fishing gears
![](https://cdn.britannica.com/60/88660-050-ED2B7DBC/Haddock.jpg)
Commercial fishing - Nets, Boats, Gear
What engineering tools did the ancient Romans use to build their aqueducts to have the proper fall over great distances? Have any fragments of their “blueprints” or engineering instructions ever been recovered?