S U M M A R I U M.

EPISTOLA. XIV. Page 128.

The tendon of an ox thigh is described. Concerning the very numerous membranes, spreading themselves through that tendon. Concerning the blood vessels of those membranes. A transverse tendon passes over every particle of the tendon, no larger than a grain of sand. Those tendons are not lacking their spiral ducts. Why it is necessary for tendons, at the joints, to be strengthened with transverse tendons. The same is observed in the tendons of sheep and chickens: likewise in the tendons of mice and hares; and with what difference? Smaller tendons also do not lack spiral ducts, or gyres wrapping themselves around.

EPISTOLA. XV. Page 135

The fleshy parts of animals are not everywhere inserted into the tendons themselves by their extremity. The hind feet of a mouse subjected to examination. How numerous the tendons are with which they are provided. The most suitable and orderly arrangement of those tendons, and also of the fibrils. Whatever force is applied to the upper parts of the said tendons, is also applied to the lower ones. The tendons of a mouse thigh, no thicker than a hair of a human head, are nevertheless not devoid of spiral wrinkles. The described connection of tendons with tendons, and with fibrils. Fibrils in a certain sense must be called tendons. Where the extremities of the tendons end. A larger muscle is compared with the trunk of a tree, diffused into various branches. Other things concerning mouse tendons. All the tendons and fibrils of one and the same muscle are moved at one and the same time. The admirable and most concise construction of muscles, tendons, and fibrils. The insertion of fibrils into other fibrils. The violence, which is applied to the tendons, also passes into the fibrils. Fibrils are, in a certain sense, the generators of fibrils. The meat of a polecat subjected to examination.

EPISTOLA. XVI. Page 149

Fleshy fibrils can be considered under the name of tendons. No force is applied to a tendon, which does not redound into the fleshy fibrils. Tendons

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