Contact | Library of Congress

<!DOCTYPE html> <html lang="en" class="no-js" prefix="lc: http://loc.gov/#"> <head><script type="text/javascript" src="/_static/js/bundle-playback.js?v=HxkREWBo" charset="utf-8"></script> <script type="text/javascript" src="/_static/js/wombat.js?v=txqj7nKC" charset="utf-8"></script> <script>window.RufflePlayer=window.RufflePlayer||{};window.RufflePlayer.config={"autoplay":"on","unmuteOverlay":"hidden"};</script> <script type="text/javascript" src="/_static/js/ruffle/ruffle.js"></script> <script type="text/javascript"> __wm.init("https://web.archive.org/web"); __wm.wombat("https://www.loc.gov/contact/","20210125034049","https://web.archive.org/","web","/_static/", "1611546049"); </script> <link rel="stylesheet" type="text/css" href="/_static/css/banner-styles.css?v=S1zqJCYt" /> <link rel="stylesheet" type="text/css" href="/_static/css/iconochive.css?v=3PDvdIFv" />  <meta charset="utf-8"> <meta name="viewport" content="width=device-width,initial-scale=1"/> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="version" content="$Revision$"/> <meta name="msvalidate.01" content="5C89FB9D99590AB2F55BD95C3A59BD81"/> <link title="schema(DC)" rel="schema.dc" href="http://purl.org/dc/elements/1.1/"/> <meta name="dc.language" content="eng"/> <meta name="dc.source" content="Library of Congress, Washington, D.C. 20540 USA"/> <link rel="alternate" type="application/json" href="https://web.archive.org/web/20210125034049/https://www.loc.gov/contact/?fo=json"/> <meta property="fb:admins" content="libraryofcongress"/> <meta property="og:site_name" content="The Library of Congress"/> <meta property="og:type" content="article"/> <meta property="twitter:site" content="librarycongress"/> <title> Contact  |  Library of Congress </title> <meta name="dc.title" content="Contact 聽|聽Library of Congress "/> <meta property="og:title" content="Contact 聽|聽Library of Congress "/> <meta name="description" content=" Ask a Librarian Get direct help from a member of the Library of Congress reference staff."/> <meta property="og:description" content=" Ask a Librarian Get direct help from a member of the Library of Congress reference staff."/> <meta name="dc.rights" content="Text is U.S. Government Work"/> <link rel="dc.rights" title="Rights Restriction" href="http://www.loc.gov/text-us-government-work"/> <meta name="dc.type" content="web page"/> <meta property="og:image" content="https://web.archive.org/web/20210125034049im_/http://www.loc.gov/static/images/favicons/open-graph-logo.png"/> <meta property="og:image:secure_url" content="https://www.loc.gov/static/images/favicons/open-graph-logo.png"/> <meta property="og:image:width" content="1200"/> <meta property="og:image:height" content="630"/> <link href="/web/20210125034049cs_/https://www.loc.gov/static/stylesheets/base.css" type="text/css" rel="stylesheet"/> <script src="https://web.archive.org/web/20210125034049js_/https://assets.adobedtm.com/dac62e20b491e735c6b56e64c39134d8ee93f9cf/satelliteLib-6b47f831c184878d7338d4683ecf773a17973bb9.js"></script> <script type="text/javascript" src="/web/20210125034049js_/https://www.loc.gov/static/js/lib/jquery-1.8.2.js"></script> <script type="text/javascript"> /** * Timing.js 1.0.4 * Copyright 2015 Addy Osmani */ (function(window) { 'use strict'; 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$('.royalSlider').royalSlider("updateSliderSize", true); if(slider){ slider.ev.on('rsAfterContentSet', function (e, slideObject) { var img = slideObject.holder.find('img').eq(0); if (img && img.length && slideObject.caption) { img.attr('alt', slideObject.caption.text()); } }); } return slider; } function create_overlay(highlight_id, left, top, width, height) { return $('<div id="' + highlight_id + '" class="hit-highlight image-highlight" />') .css({ 'left': left + '%', 'top': top + '%', 'width': width + '%', 'height': height + '%', 'position': 'absolute', 'z-index': 10 }); } function position_overlays(page_id, page_width, page_height, coords_list, $image, $container, fudge) { if (!($container.length)) { // no actual search result for this page -- exit this function return true; } $container.find('div.image-highlight').remove(); if (!coords_list) { // coords data doesn't exist -- exit this function return true; } var container_width = $container.width(); var container_height = $container.height(); var image_marginLeft = $image[0].offsetLeft; var image_marginTop = $image[0].offsetTop; var image_width = $image.width(); var image_height = $image.height(); // The overlays are positioned relative to their parent, the // $container, but they need to show up in the right place relative // to the image. // The $container can be larger than the image, // so we take the ratio of the sizes and use it to scale the // positions, widths, and heights of the highlight overlays. // We also make the overlays a little larger so they're more visible // and we shift them a little using the "fudge" numbers. var marginLeft = image_marginLeft / container_width; var marginTop = image_marginTop / container_height; var scaleWidth = image_width / container_width; var scaleHeight = image_height / container_height; $.each(coords_list, function (index, coords) { // word coordinates: [left, top, width, height] var highlight_id = "highlight-" + page_id + '-' + index; var overlay_left = 100 * (marginLeft + scaleWidth * coords[0] / page_width) + fudge.left; var overlay_top = 100 * (marginTop + scaleHeight * coords[1] / page_height) + fudge.top; var overlay_width = 100 * coords[2] / page_width * scaleWidth + fudge.width; var overlay_height = 100 * coords[3] / page_height * scaleHeight + fudge.height; var $highlight_overlay = create_overlay(highlight_id, overlay_left, overlay_top, overlay_width, overlay_height); $container.append($highlight_overlay); }); } var word_coordinates_pages; word_coordinates_pages = {}; var get_$container; var get_$image; var fudge_numbers; get_$container = function(page_id) { return $("#highlights-container-" + page_id); }; get_$image = function(page_id) { return $("#iconic-segment-image-" + page_id); }; fudge_numbers = { left: -1.3, top: -0.5, width: 2.5, height: 1.3 }; if (!$.isEmptyObject(word_coordinates_pages)) { var $iconic = $(".iconic"); var loaded = 0; var loaded_total = $iconic.length; // make sure we wait til all the images are loaded before we try to position the highlights on them: $iconic.one("load", function() { loaded++; if (loaded === loaded_total) { $.each(word_coordinates_pages, function(page_id, page) { var $image = get_$image(page_id); var $container = get_$container(page_id); position_overlays(page_id, page.width, page.height, page.coords_list, $image, $container, fudge_numbers); }); } }).each(function() { // to make sure the "on load" event occurs even if the // images are already cached: if (this.complete) { $(this).load(); } }); } $(window).resize(function() { setTimeout(function() { $.each(word_coordinates_pages, function(page_id, page) { var $container = get_$container(page_id); var $image = get_$image(page_id, $container); position_overlays(page_id, page.width, page.height, page.coords_list, $image, $container, fudge_numbers); }); }, 300); }); }); </script> </div> </script> <script type="text/javascript"> if(window['_satellite']){ _satellite.pageBottom(); } </script> </body> </html>

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