友情提示:如果本网页打开太慢或显示不完整,请尝试鼠标右键“刷新”本网页!
读书室 返回本书目录 加入书签 我的书架 我的书签 TXT全本下载 『收藏到我的浏览器』

on books and the housing of them-第5部分

快捷操作: 按键盘上方向键 ← 或 → 可快速上下翻页 按键盘上的 Enter 键可回到本书目录页 按键盘上方向键 ↑ 可回到本页顶部! 如果本书没有阅读完,想下次继续接着阅读,可使用上方 "收藏到我的浏览器" 功能 和 "加入书签" 功能!

project 12 to 18 inches at each end beyond the line of 
the wall。 Let the passage ends be entirely given to 
either window or glass door。 Twenty…four pairs of 
trams run across the room。 On them are placed 56 
bookcases; divided by the passage; reaching to the 
ceiling; each 3 feet broad; 12 inches deep; and separated 
from its neighbors by an interval of 2 inches;
and set on small wheels; pulleys; or rollers; to work
along the trams。 Strong handles on the inner side of
each bookcase to draw it out into the passage。 Each
of these bookcases would hold 500 octavos; and a room
of 28 feet by 10 would receive 25;000 volumes。 A room
of 40 feet by 20 (no great size) would receive 60;000;
It would; of course; be not properly a room; but a
warehouse。







End 
返回目录 上一页 回到顶部 0 0
快捷操作: 按键盘上方向键 ← 或 → 可快速上下翻页 按键盘上的 Enter 键可回到本书目录页 按键盘上方向键 ↑ 可回到本页顶部!
温馨提示: 温看小说的同时发表评论,说出自己的看法和其它小伙伴们分享也不错哦!发表书评还可以获得积分和经验奖励,认真写原创书评 被采纳为精评可以获得大量金币、积分和经验奖励哦!