( 4 *?) Numbly. 
A LETTER 
Concerning a new way of curing fundry difeafes by Transfufm 
of Blood? Written to Monfieur de MONTMOR. 
Counfellor to the French King, and Mafler of Requefts, 
By J: DENIS Profeffor of Philofcphy, 
and the Mathematicks. 
Munday July 22. 1667. 
S1K, ~ " 
H E project of caufing the Blood of a 
healthy animal to pafTe into the veins of 
one difeafed , having been conceived a- 
bout ten yean agoe t in the illuftrious Society 
of Virtue fi which afiembles at your houfe> 
and your goodnefs having received M. 
Emmeri^Sc my felf, very favorably at fiich 
times as we have prefum’d to entertain 
you either with difeourfe concerning it, or the fight of fame 
not inconfiderable effetSis of it ; You will not think it ftrange 
that I now take the liberty of troubling you with this 
Letter, and defign to inform you fully what purfuances and 
fuccefifes we have made in this Operation > wherein you are 
Juftly intitled to a greater lhare than any other, conftderipg 
that it was firft fpoken of in your Academy & that the Publick 
is beholding to you for this as well as for many other difeove-' 
riesj for the benefits & advantages it fhall reap from the fame. 
But that I may give you the reafons of our procedure & ecu:. 
Gee vines 
