Sujet
Colvin'S hydraulic milking machine: corrugated rubber suction cups were placed over the teats
Légende
Engraving depicting Colvin's hydraulic milking machine: corrugated rubber suction cups were placed over the teats. Oscillating pumps gave the motion of a calf sucking, and created a partial vacuum, and the milk was drawn off into churns set in the floor. At the right of the picture the cow is being released from the stall, and the cups have been removed and swung out of the way and can be seen by the churn. Dated 19th Century
Date
19e siècle
Crédit
Photo12/Ann Ronan Picture Library
Notre référence
ARP23A14_081
Licence
Droits gérés
Format disponible
60,0Mo (4,6Mo) / 41,5cm x 36,2cm / 4907 x 4274 (300dpi)