Someone posted a link of the partial translation of the well known  Chen Shi TaijiQuan book in the ChenWired  forum.  This is my favorite Chen style book with very detailed analysis of the New Frame Routine 1 and 2. Interestingly the translated articles were found on the Yang Family taichi site.

The 2 articles links are

1. The Fourth Characteristic: An Exercise of Empty and Full in which the Body Stands Centered and Upper and Lower Body are Coordinated
2. The Second Characteristic: An Exercise of Springy Lengthening of the Body and Limbs

Enjoy reading!