ABSTRACT

In their 1906 paper to the Academie des Sciences in Paris a {'P,ot"lnr Bordas and d'Arsonval demonstrated for the first time that it was

possible to dry a delicate product from the frozen state under moderate vacuum. In that state it would be stable at room for a long time and the authors in a set of successive notes, that this technlqlle could be to the of sera and vaccines. was then its been in use centuries ago the Incas who dried their frozen meat in the radiant heat of the sun in the rarified atno05:phere of the Altiplano.