Essay on the Effects of the Placenta on the Foetal Blood

Scope and Content

This is an unbound essay consisting of 17 folios with the original pagination pp.1-34 entitled 'What are the changes effected on the foetal blood by circulating through the placenta?'. The stamp of the Victoria University of Manchester is evident on the final page, and Lyon has also signed the final page and dated it 9th November 1814.

Firstly Lyon focuses on the nature and characteristics of the placenta in humans and animals, then focuses entirely on the human placenta before considering the nature of respiration.