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- Q4888997 subject Q6645781.
- Q4888997 subject Q6934754.
- Q4888997 subject Q8756497.
- Q4888997 abstract "Professor Benjamin S. H. Maillefert (November 11, 1813 – August 8, 1884) was an engineer who specialized in underwater blasting. He developed torpedoes used by the Union naval forces during the American Civil War.Maillefert was born in Barcelona, Spain and was responsible for several attempts a blasting to improve navigation through Hell Gate in New York City's East River. His obituary from the August 12, 1884 New York Times reads:Prof. Benjamin S. H. Maillefert was a member of the firm of B. Maillefert & Co., who obtained a reputation in their experiments with surface blasting, which was applied by them to the Hell Gate work. He was engaged in this work as far back as 1855. Their implements for surface blasting consisted simply of a boat and iron rod, to feel the bottom with and to let down charges with an electric battery. The firm obtained a contract to clear away Pot Rock and Sheldrake Reef, the contract ending on January 1, 1870. The result of their labor was not entirely satisfactory, as during the summer the rock was blown away only so as to give a depth from 12 to 20 feet, while the contract called for 25 feet. The Government then took charge of the work under Gen. Newton. Prof. Maillefert since then led a quiet life, not engaging in any business.".
- Q4888997 thumbnail Benjamin_S_H_Mallifert.jpg?width=300.
- Q4888997 wikiPageExternalLink siege_of_charleston_expedition.html.
- Q4888997 wikiPageExternalLink 200411236425_347.pdf.
- Q4888997 wikiPageExternalLink mail.shtm.
- Q4888997 wikiPageExternalLink February1864.html.
- Q4888997 wikiPageExternalLink hellgate.pdf.
- Q4888997 wikiPageExternalLink Patents1850-1854.htm.
- Q4888997 wikiPageWikiLink Q1492.
- Q4888997 wikiPageWikiLink Q165363.
- Q4888997 wikiPageWikiLink Q212862.
- Q4888997 wikiPageWikiLink Q214102.
- Q4888997 wikiPageWikiLink Q6645781.
- Q4888997 wikiPageWikiLink Q6934754.
- Q4888997 wikiPageWikiLink Q838755.
- Q4888997 wikiPageWikiLink Q8676.
- Q4888997 wikiPageWikiLink Q8756497.
- Q4888997 wikiPageWikiLink Q9684.
- Q4888997 comment "Professor Benjamin S. H. Maillefert (November 11, 1813 – August 8, 1884) was an engineer who specialized in underwater blasting. He developed torpedoes used by the Union naval forces during the American Civil War.Maillefert was born in Barcelona, Spain and was responsible for several attempts a blasting to improve navigation through Hell Gate in New York City's East River. His obituary from the August 12, 1884 New York Times reads:Prof. Benjamin S. H.".
- Q4888997 label "Benjamin Maillefert".
- Q4888997 depiction Benjamin_S_H_Mallifert.jpg.