2e8 MEM OIKS of the 
and the intercoftal ; and having cut up the canal o( the Veyte- 
hrce he difcovered the Medulla Spinalis all along the cavity, 
and' traced all the vertebral nerves proceeding therefrom, as 
allbthc Sciatic v^^rvc, which was confiderable enough ^ it is 
true, the Medulla Spinalis was not hereof that confiftence as in 
adult peribns, but one could with fome pains oblerve all the 
four tunics, and the two fubftances, as in the brainy ;:;/^. the 
cortical or gland ulcus fubftance, and the fibrous or white lub- 
llance; but with this difference, that the brown fubftance is 
exterior in the brain, but interior in the Medulla Spinalis -, tor 
it is, as it were, a third brain contained m the canal ot the 
Vertebra, which are defigned for its defence 5 it has Meninges, 
Sinus\ and cavities, which may pafs for ventricles like the 
brain; but it appears to be more ienfible and neceffary to lite 
than the brain itlelf^ for if you take away the brain, or Cere- 
bellum from ^n animal, yet the ^^''f^\'^'^}}\'l^^^^^^^ 
after, bur a wound or compreffion of the Medulla Spinalis will 
caufe ludden death; this is confirmed by fevcral anatomical 
experiments. i.M. du Vcrney took away the brain and C^;t- 
lellum from a pigeon, and ftuffed the Cranium with flax, not- 
withftanding which, it lived fome time, fearched for its 
aliment, did the ordinary funaionsof life, and had the ute of is 
fenfes 2. M. Chirac, profeffor of anatomy at Montpeher, took 
away 'the brain from a dog, yet he lived for fome time after, 
but when the Cerebellum was taken out, he died immediately j 
but he obferved, that by blowing into the lungs, the animal 
lived an hour, altho' without the Cerebellum. 3- ^^. ^^°^ 
away from another dog half the Cerebellum, but he died imme- 
diately. 4. After he had taken away half the brain from a 
third do-, he continued to have the motion of all the parts, 
and couM walk about; and even after he had taken away all 
the brain, he had ftiU fenfe and refpiration. 5- ^.^fY^Tn 
the Medulla Oblongata of a fourth dog from the Medulla ^pi- 
fialis, by mtroducmg a pair of fciflars between the fir t 
Vertebra ^r^^ the Os Occipitis ; the dog had died immediatel>, 
but by blowing into the lungs, the motion of the^^^^J^'^,^ 
continued, and the animal could move his body 6. He took 
the Cerebellum from a fifth dog, but he lived 24 hours, and his 
heart beat regularly. , i- r^ 
All thefe experiments fliew, that an animal may live tor 
fome time, tho' imperfeftly, without the brain,, and even the 
Cerebellum-, but there is no experiment, wher«; they ever lived 
without them all 3 it is therefore probable, that the MeduUa 
