I was entirely prevented from shutting the windows of my laboratory, from fear that a too elevated temperature might put an end to the lethargy of the subject, or induce some change in the fluids.

If a thaw had come on, all would have been over with my experiment.

But the thermometer kept for several days between six and eight degrees below zero, and I was very happy in seeing the lethargic sleep continue, without having to fear congelation of the tissues.
I commenced to produce the vacuum with extreme slowness, for fear that the gases distributed through the blood, becoming free on account of the difference of their tension from that of rarified air, might escape in the vessels and so bring on immediate death.

Moreover, I watched, every moment, the effects of the vacuum on the intestinal gases, for by expanding inside in proportion as the pressure of the air diminished outside of the body, they could have caused serious disorders.

The tissues might not have been entirely ruptured by them, but an internal lesion would have been enough to occasion death in a few hours after reanimation.