These are the four diagrams I have always wondered what they are: https://imgur.com/uET07hw 17 https://imgur.com/8S0U2zs 21 https://imgur.com/pMgOAMi 18 https://imgur.com/mQjw9OF 19

The context of the pictures are: This diary was found on a dead german soldier (officer?) in WWI, by a relative of mine in the new zealand military. The diary itself is in high german. There was an attempted translation by my german grandfather on the other side of the family who can read high german, But apparently it's very depressing for someone who fought in WWII to read. I think its his summary at the end in the blue pen, but I dunno (I can't speak german).

For context I have posted all the pages I have here: https://imgur.com/a/M7o2eZN The original was donated to a museum in Napier along with this guys pistol back in the 80's so I don't have access to the rest of it.

I would love to know what those diagrams relate to as its a mystery to me. A basic understanding of what is in the diary would be cool to but, I understand that's a fair bit to read.

If this is the wrong kind of question feel free to remove mods.