简平仪说
熊三拔
3 chapters·8,823 characters·Classical Chinese · Public Domain
一卷。明熊三拔撰。简平仪是熊三拔仿照星盘原理所造，分上下两盘。天盘在下为方版，地盘在上空其半圆，便于合视。两盘之间设枢纽，使可旋转。该书着力介绍使用简平仪观测太阳经纬度、定时刻、定纬度等方法，还简论大地是个球体的概念。收入明刻《天学初函》本、《守山阁丛书》本、《中西算学丛书》本。
Chapters (3)
CoverPage
Cover Image
✦ Pro for classical readers
Read 简平仪说 the way it was meant to be read.
Free tier gives you the full text and tap-to-look-up. Pro adds: line-by-line modern Mandarin, pinyin on every line, AI passage rewrites, audio read-along, and a workbook that remembers every character you save. All 5 languages. $2.50/month, annual.