. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. SPLEEN. 795 loops or with free extremities. In the calf, the thickness of these smallest nerves on arteries of a line in diameter (where it is not uncommon to find two such trunks) is 24 to 28-1000ths of a line ; on the pencils of arteries 48 to 56-10,OOOths ; on the smallest ar- teries and capillaries 3 to 4-1000ths. Their structure was so far peculiar, that in the calf the finest nerves (Jig- 539.) exhibited no trace of nerve fibres, even when treated with soda and acetic acid, but they seemed to consist wholly and sol
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. SPLEEN. 795 loops or with free extremities. In the calf, the thickness of these smallest nerves on arteries of a line in diameter (where it is not uncommon to find two such trunks) is 24 to 28-1000ths of a line ; on the pencils of arteries 48 to 56-10,OOOths ; on the smallest ar- teries and capillaries 3 to 4-1000ths. Their structure was so far peculiar, that in the calf the finest nerves (Jig- 539.) exhibited no trace of nerve fibres, even when treated with soda and acetic acid, but they seemed to consist wholly and solely of the fibres of Ilemak. Nevertheless, in branches of 12 to '28-1000ths of a line, I have often very plainly seen a single Fig. 540. A somewhat larger nerve, in which may be seen, a sin file dark nerve fibre : also from the Calf. Mag- nified 350 diameters. nerve tubule of 20 to 28-10,OOOths of a line (Jig. 540.), with dark margins, in the midst of the fibres of Remak. From these facts it may be concluded that the finest nerve tubes in the spleen of the calf are devoid of the dark bor- ders, just as they are in the organ of smell according to TodJ and Bowman ; or as in the Pacinian corpuscles, the cornea, &c.; but we are scarcely able to conclude therefrom that they possess the same constitution in the adult animal. I will here permit myself to Fig. Two primitive nerve fibres given off from the trnnli of vc of the Calf, about an inc/i before its the splenic nerve < entry into the Spleen. Magnified JuO diameters. add an interesting microscopic observation concerning the splenic nerves of the calf. A division of the primitive nerve fibres takes place in them (fig. 541.), similar to that which Henle and myself found in the Pacinian cor- puscles, Mtiller, Briicke, and R. Wagner in the muscles, and Savi and R. Wagner in the electrical organ of the torpedo. But what is altogether new in the minute anatomy of nerve is, that these divisions do not take place at the ter
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