permalinks
Trizek_(WMF)
CC BY-SA 4.0
Rix Dobbs planting 4th plant in a tube
Photo by Ildar Sagdejev
KFNB_AJAX_TMW_detail_2018-07-21-crop
Herbert Ortner
CC-BY 4.0 (cropped)
Stephenson’s_2-2-2_Patent_Locomotive_of_1837_-_crank_axle_cropped
Clock gears
Przemek Pietrak
CC BY-SA 3.0
Sunflower_seedlings
Bluemoose~commonswiki
Creative Commons Attribution-Share Alike 3.0 Unported (cropped)
Deutz motor locomotive operating on the American controlled 'St. Mihiel Argonne & Berlin' railway 1918 (NARA111-SC-23667-ac)
Probably United States Army Signal Corps
Public Domain
Start_the_Suggested_edits_workflow_2
Bluetpp (WMF)
CC-BY-SA 4.0
Wheel_on_“Peggy,”_a_Lima_Shay_Geared_Steam_Locomotive_(SN_2172)
Steven Fine