These are some of Angus' original photos. Angus, the files were tiny, so I did what I could to improve and sharpen them. The ones you were able to forward, I think did not include the one with a measuring tape.
Angus' narrative that went with his photos was:
"...It is of a frozen cow lie in sternal. Left side of animal. The skeleton from first rib to end of pelvis is 53 inches. The ribs I count 13 of em is 29 inches. At rib seven is the start of the rumen ingesta. This ball of frozen rumen contents is 12 inches wide and 17 inches long. I believe a live animal would be larger. It lays along the [right]
left (I flipped the photo for consistency with other illustrations - Jag) rib cage starting at rib seven going back towards the tail. The metal ring in the photos is seven inches in diameter. The spinous process of the spine are 8 inches before the scapula and 5 inches behind it. The depth of the lung field is a maximum of 16 inches. This deepest part is where the scapula us positioned. It is my belief a elk lying down will have the scapula shifted foreword. The area behind a standing animal where there is lung are would be slightly less than the 8 inches shown in the photo. As you can see neck of the scapula is about dead center of the lung field. With 9 inches in front and 9 inches behind."