(Forgive the messy working someone has done on this). This is an excerpt from an engineering textbook that I would like to get my hands on. This is pages 188 and 189.
Sorry it is very vague
, the only other information I can offer is that the textbook is somewhat old and has a distinct orange square at the top corner on each page. If you recognise it could you please tell me what it is?
![IMG-3314.JPG](/data/attachments/28/28504-238d5ce2bc38dd7b8fd155d426b4dff7.jpg)
![IMG-3315.JPG](/data/attachments/28/28505-0d34fa111c8db3820e1cfad191b21ae6.jpg)
Sorry it is very vague
![IMG-3314.JPG](/data/attachments/28/28504-238d5ce2bc38dd7b8fd155d426b4dff7.jpg)
![IMG-3315.JPG](/data/attachments/28/28505-0d34fa111c8db3820e1cfad191b21ae6.jpg)