I have just discovered that this essential book is now freely available online via Heidelberg
[digi.ub.uni-heidelberg.de]

I was long ago able to obtain a photocopy of this work, but having the pdf will now make it far easier for me to copy and paste from. Perhaps it has been available online for some time and I have simply been unaware, but in any event I pass this along to any who might find having a pdf version of Jequier's 'reines Neit et Apouit' to be helpful.