Analysis of information sources in references of the Wikipedia article "Beekeeping" in English language version.
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{{cite book}}: |work= ignored (help)CS1 maint: multiple names: authors list (link)<ref> tag; supported parameters are dir, follow, group, name (see the help page).... a honey extractor. This machine, invented by Major Francesco De Hruschka in 1865, used centrifugal force to dislodge honey from the combs and collected it into a vat. The extractor, combined with Langstroth's movable comb hive, greatly improved the efficiency of honey harvesting.
... a honey extractor. This machine, invented by Major Francesco De Hruschka in 1865, used centrifugal force to dislodge honey from the combs and collected it into a vat. The extractor, combined with Langstroth's movable comb hive, greatly improved the efficiency of honey harvesting.