2,897 research outputs found

    Refrigerated Wind Tunnel Tests on Surface Coatings for Preventing Ice Formation

    Get PDF
    This investigation was conducted to determine the effectiveness of various surface coatings as a means for preventing ice formations on aircraft in flight. The substances used as coatings for these tests are divided into two groups: compounds soluble in water, and those which are insoluble in water. It was found that certain soluble compounds were apparently effective in preventing the formation of ice on an airfoil model, while all insoluble compounds which were tested were found to be ineffective

    Land Grant Application- Knight, William (Poland)

    Get PDF
    Land grant application submitted to the Maine Land Office on behalf of William Knight for service in the Revolutionary War, by their widow Phebe.https://digitalmaine.com/revolutionary_war_me_land_office/1539/thumbnail.jp

    Samuel Wilmot, Fish Culture, and Recreational Fisheries in late 19th century Ontario

    Get PDF
    Historians have shown that fish culturists and anglers enjoyed a mutually beneficial relationship in 19th century North America. Sharing interests in producing and protecting fish for recreation, the two groups supported emerging regimes of fisheries administration and fish culture that privileged angling and game fish species. In Ontario, it has been argued that anglers achieved control of inland fisheries with help from state fish culturist Samuel Wilmot who, as a sportsman, shared anglers' recreational perspective. A closer look at Wilmot and fish culture in late 19th century Ontario, however, reveals a more complex struggle over recreational fisheries administration. I show that game fish culture under Wilmot was subordinated to fish culture programs that supported the Great Lakes commercial fisheries. Indeed, Wilmot resisted anglers' refraining of Ontario's fisheries as a private recreational resource. By the 1890s, however, this position was unpopular with Ontario's anglers and government officials, who demanded greater provincial control over recreational fisheries and fish culture. It was only after Wilmot's retirement in 1895 that game fish culture received higher priority in Ontario with both federal and provincial governments engaging in programs of wild bass transfers. In 1899, Ontario won a share of fisheries jurisdiction and established its first provincial fisheries administration, which laid the basis for more comprehensive programs of game fish culture in the 20th century.Les historiens ont dĂ©montrĂ© que les pisciculteurs et les pĂȘcheurs Ă  la ligne ont entretenu une relation bĂ©nifique au cours du 19e siĂšcle en AmĂ©rique du Nord. Partageant des intĂ©rĂȘts similaires pour la production et la protection du poisson Ă  des fins rĂ©crĂ©atives, ces deux groupes ont appuyĂ© les rĂ©gimes Ă©mergents de gestion des pĂȘcheries et l’élevage de poissons qui privilĂ©gie les espĂšces plus « sportives ». En Ontario, il a Ă©tĂ© dit que les pĂȘcheurs Ă  la ligne sont parvenus Ă  contrĂŽler les pĂȘcheries continentales avec l’aide du pisciculteur liĂ© Ă  l’État Samuel Wilmot qui, lui-mĂȘme sportif, partageait la perspective rĂ©crĂ©ative des pĂȘcheurs Ă  la ligne. Une Ă©tude plus prĂ©cise de Wilmot et de la pisciculture en Ontario Ă  la fin du 19e siĂšcle rĂ©vĂšle toutefois une lutte beaucoup plus complexe qui entoure la gestion de la pĂȘche rĂ©crĂ©ative. Il sera dĂ©montrĂ© que l’élevage de poissons rĂ©crĂ©atifs sous Wilmot Ă©tait subordonnĂ© Ă  des programmes de pisciculture supportant les pĂȘcheries commerciales sur les Grands Lacs. Bien Ă©videmment, Wilmot s’oppose Ă  la restructuration des pĂȘcheries ontariennes en ressource rĂ©crĂ©ative privĂ©e, tel que le souhaite les pĂȘcheurs Ă  la ligne. Vers les annĂ©es 1890, cette position devient toutefois trĂšs impopulaire auprĂšs des pĂȘcheurs Ă  la ligne et des officiels du gouvernement ontarien qui demandent un contrĂŽle provincial accru sur la pĂȘche rĂ©crĂ©ative et les piscicultures. C’est seulement aprĂšs le dĂ©part de Wilmot en 1895 que l’élevage de poissons rĂ©crĂ©atifs gagne en importance en Ontario et ce, grĂące aux gouvernements fĂ©dĂ©ral et provinciaux qui s’engagent dans des programmes d’ensemencement de perches. En 1899, l’Ontario s’enrichit d’une nouvelle juridiction sur les pĂȘcheries et Ă©tablit pour la premiĂšre fois un bureau provincial des pĂȘcheries, lequel pose les bases pour la crĂ©ation de programmes plus complets d’élevage de poissons rĂ©crĂ©atifs au courant du 20e siĂšcle

    The Go Home Bay Biological Station: A Landscape of Science

    Get PDF

    Health instruction in Nebraska high schools

    Get PDF

    The ribosome builder: A software project to simulate the ribosome

    Get PDF

    CSCI 315E.01: Computers, Ethics, and Society

    Get PDF
    • 

    corecore