| 梦溪笔谈 | 
Mèng Xī Bǐ tán | 
Dream Pool Essays by Shen Kuo 沈括, book on various fields of knowledge, the first to describe the magnetic needle compass | 
| 梦 | 
mèng | 
dream (CL:场,个) / (bound form) to dream | 
|  溪 | 
xī | 
creek / rivulet | 
|  溪 | 
xī | 
variant of 溪 | 
|   笔 | 
bǐ | 
pen / pencil / writing brush / to write or compose / the strokes of Chinese characters / classifier for sums of money, deals / CL:支,枝 | 
|   笔谈 | 
bǐ tán | 
to communicate by means of written notes (instead of speaking) / to publish one's opinion (e.g. as part of a scholarly dialogue) / (in book titles) essays / sketches | 
|    谈 | 
Tán | 
surname Tan | 
|    谈 | 
tán | 
to speak / to talk / to converse / to chat / to discuss |