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Mr. Carlisle’s Lecture 
and certainly do not extend to every muscular fibre : they 
appear to receive their contained fluids from the intersticial 
spaces formed by the reticular or cellular membrane, and 
not from the projecting open ends of tubes, as is generally 
represented. This mode of receiving fluids out of a cellular 
structure, and conveying them into cylindrical vessels, is ex- 
emplified in the corpora cavernosa, and corpus spongiosum 
penis, where arterial blood is poured into cellular or reticular 
cavities, and from thence it passes into common veins by the 
gradual coarctation of the cellular canals. 
In the common green turtle, the lacteal vessels universally 
arise from the loose cellular membrane, situated between the 
internal spongy coat of the intestines and the muscular coat. 
The cellular structure may be filled from the lacteals, or the 
lacteals from the cellular cavities. When injecting the smaller 
branches of the lymphseducts retrograde in an oedematous 
human leg, I saw, very distinctly, three orifices of these vessels 
terminating in the angles of the cells, into which the quick- 
silver trickled. The preparation is preserved, and a drawing of 
the appearance made at the time. It was also proved, by many 
experiments, that neither the lymphaeducts, nor the veins, 
have any valves in their minute branches. 
The nerves of voluntary muscles separate from the same 
bundles of fibrils with the nerves which are distributed in the 
skin, and other parts, for sensation ; but a greater proportion 
of nerve is appropriated to the voluntary muscles, than to any 
other substances, the organs of the senses excepted. 
The nerves of volition all arise from the parts formed by 
the junction of the two great masses of the brain, called the 
Cerebrum and Cerebellum, and from the extension of that 
