IV. AND REVIVED. 129 
‘or confiftent will more flowly receive the impref- 
fion of the water, and be longer of reviving ; or 
fome may be difeafed, and lefs fit for immediate 
+efurrection. I have not perceived any very fen- 
fible difference of time between the refurrection 
of thofe that have been dry fome hours, and the 
refurrection of thofe that have been dry feveral 
days, months, or even complete years. 
As I knew the influence of heat in reftoring 
the life of animals and vegetables, the fand was 
frequently moiftened with warm water: and the 
animals revived fooner than when it was wet with 
water at the temperature of the atmofphere. 
But there is one condition indifpenfible to the 
refurrection of wheel animals: it is abfolutely ne- 
ceffary that there fheuld be a certain quantity of 
fand ; without it they will not revive. ‘Let us 
enquire further inte this. One day I had two 
wheel animals traverfing a drop of water about 
to evaporate, which contained very little fand. 
Three quarters of an hour after evaporation, they 
were dry and motionlefs. I moiftened them with 
water to revive them: but it was in vain, not- 
with{tanding they were immerfed in water many 
hours. Their members fwelled to thrice the 
original fize: but they continued motionlefs. 
This circumftance appeared to me the more ex- 
traordinary, as it was among the firft times I had 
wet the fand, and of all the animals I had ex- 
perimented on, thefe two were the only ones that 
Vou, I, I did 
