日晷的實作 目錄 序 第一章 目錄 第一章　日圭 ........................................................................................... 1 　一、太陽年的長度 ............................................................................................................... 7 　二、地理上的南北方向線 .................................................................................................. 9 　三、大地是圓的 ................................................................................................................... 10 　四、黃道面和赤道面的交角 ............................................................................................. 12 　五、春分和秋分 ................................................................................................................... 17 　六、夏至和冬至 ................................................................................................................... 19 　七、日圭所在地的緯度....................................................................................................... 22 第二章　傳統日晷 .................................................................................... 27 　一、赤道式 ............................................................................................................................ 29 　二、水平式 ............................................................................................................................ 34 　三、垂直式 ............................................................................................................................ 43 　四、圓弧式 ............................................................................................................................ 48 　五、半球面式 ....................................................................................................................... 51 　六、變心日晷 ....................................................................................................................... 54 第三章　誤差 ........................................................................................... 59 　一、儀器的偏差及誤差 ...................................................................................................... 60 　二、人為的誤差 ................................................................................................................... 61 　三、小結 ................................................................................................................................ 61 　四、日晷測量的誤差來源 .................................................................................................. 62 　五、結論 ................................................................................................................................ 64 第四章　讓我們來做個日晷玩吧 ............................................................... 67 　一、製作 ................................................................................................................................ 68 　　1. 赤道式日晷 ................................................................................................................... 68 　　2. 水平式日晷 ................................................................................................................... 82 　　3. 垂直式日晷 ................................................................................................................... 86 　二、檢討 ................................................................................................................................ 90 　　1. 結構部分 ........................................................................................................................ 90 　　2. 數字部分 ........................................................................................................................ 92 　三、攜帶型日晷 ................................................................................................................... 95 第五章　計時又計日的日晷 ...................................................................... 99 　一、平面式 ............................................................................................................................ 100 　二、半球面式 ....................................................................................................................... 104 　三、圓柱面式 ....................................................................................................................... 109 　四、平面立體式 ................................................................................................................... 113 　　1. 雙牆式 ............................................................................................................................ 113 　　2. 單牆式 ............................................................................................................................ 116 　　3. 三牆式 ............................................................................................................................ 118 　　4. 雙牆式 ............................................................................................................................ 119 　　5. 四牆式 ............................................................................................................................ 119 　　6. 雙牆式 ............................................................................................................................ 120 　　7. 三牆式 ............................................................................................................................ 121 附錄 ......................................................................................................... 123 　附錄一 　　台灣省各地的經緯度以及製作水平式和垂直式日晷所需的底邊長 　　和垂邊長的比例 ............................................................................................................... 124 　附錄二　一年裡各天的時差補正值及其圖形 ............................................................... 125 　附錄三　赤道式與圓柱面式的面盤圖形 ........................................................................ 127 　附錄四　公式 ....................................................................................................................... 129 　附錄五　計算日影位置之Qbasic 程式 ............................................................................. 131 　附錄六　一些日晷相關的相片 ......................................................................................... 141 參考書籍及網站 ....................................................................................... 162 索引 ......................................................................................................... 164