valens-i-05

中天〈MC〉可以用下列簡便的方法求得：使用〈相應〉氣候帶（klima）的升起時間，將從下降點到其對宮點之間各段的升起時間相加，然後取其總和的一半。再從下降點開始計算這個數值。計數停止之處就是中天。/22P/ 例如：上升點位於第二氣候帶的摩羯座15°。我取從 /23K/ 下降點，也就是巨蟹座15°，到摩羯座15°之間的升起時間；總數為214。其一半是107。再將巨蟹座的15°加到這個數值上，我便從同一點開始計數。最後停在天蠍座2°，這就是中天。其他〈度數位置〉也以同樣方式計算。

Midheaven can be handily found in this way: using the rising times for the klima, add the rising times from the Descendant to the point in opposition, then take half of the sum. Count this off from the Descendant. MC will be where the count stops. /22P/ For example: the Ascendant is Capricorn 15° in the second klima. I take the rising times from the /23K/ Descendant, Cancer 15°, to Capricorn 15°; the total is 214. Half of this is 107. Adding to this the 15° of Cancer, I count from that same point. The count stops at Scorpio 2°, which is MC. Similarly for the other .

如果你想知道白晝各時辰的長度，在所有情況下，都把從太陽所在度數到其對宮點之間的升起時間加總。取其十五分之一，就能知道一個時辰的長度。例如：假設前述的下降點，也就是巨蟹座15°，正好是太陽所在的位置。從該處到其對宮點之間的升起時間總計為214；214的十五分之一等於14〔餘4〕，並且還剩下一個時辰的4/15。因此，在敘利亞的氣候帶中，當太陽位於巨蟹座15°時，白晝長度為14又4/15個時辰。

如果你想知道夜晚的長度，則將從太陽對宮點到〈太陽〉所在位置之間的升起時間加總，以同樣的方法計算。其餘各星座也依此辦理。

If you wish to know the length of the hours of the day, in all cases add the rising times from the sun’s degree-position to the point in opposition. Take 1/15 of that and you will know the length of the hour. For example: assume the previous Descendant, Cancer 15°, is the sun’s position. The rising times from there to the point in opposition total 214; 1/15 of 214 equals 14 [remainder 4] with 4/15 parts of an hour left over. Therefore the day in the klima of Syria, with the sun in Cancer 15°, will be 14 4/15 hours. If you want to know the length of the night, work out the calculation by adding the rising times from the point opposite the sun to <the sun’s> position. Similarly with the rest of the signs.