SYSTEMATIC SYNTHESIS OF TISSUES INTO ORGANS. 233 



422. Illus. If a bone is cut across when sound, its nerves will 

 not cause pain. Indeed, two persons stated to the author that a slightly 

 pleasant tickling sensation was caused by the saw passing through the 

 bone. 



423. Remark. A twinge of excruciating pain will be caused by 

 cutting across a nerve of touch, if one happens, as is sometimes the 

 case, to extend through the bone hi the path of a section. 



424. Inf. The sooner a bone is set after it is broken, the less pain- 

 ful the operation. 



425. THE VERY SENSITIVE CONDITION OF THE NERVES 

 after a fracture is a wise means of compelling a perfect 

 quiet of the parts, such as no splint can produce ; for 

 when, as sometimes happens, the nerves do not become 

 painful, the parts are not kept sufficiently quiet to have 

 them unite, and it is necessary to excite pain in the 

 nerves. 



426. BLOOD-TUBES DO NOT EXIST IN THE CARTILAGES 

 OR LIGAMENTS of the skeleton, for it would not comport 

 with the offices of those parts to have compressible 

 Blood-tubes in them; but they exist all around those 

 parts, which are slowly nourished from them, and tedi- 

 ously recover from injuries. 



427. THE NERVES OF THE CARTILAGES AND LIGA- 

 MENTS, like those in tendons, are not sensitive while un- 

 injured, nor if pricked, cut, or even burned, but if twisted 

 ever so little are very painful. 



428. Illus. IP A TENDON ON THE BACK OF THE HAND, Sometimes 6X- 



posed by a cut, is touched with a red-hot wire, pain will not be felt, nor 

 if it is pinched but if the tendon is twisted in the slightest degree, 

 pain is instantly felt. 



429. Illus. IP A PIN IS THRUST THROUGH THE SKIN JUST ABOVE THE 



KNEE, and turned downward, it may be buried in the tendon without 

 causing pain. Boys often try this. 



430. Remark. There is A CURIOUS FACT about the nerves of the 

 hip-joint. When it is diseased, the pain caused throughout its nerves 

 seems to be in the knee, and of that part the affected child will com- 

 plain. This disease is very insidious and serious, but if taken in season 



422. Is bone painful? 424. Inf. 425. What said of ? 426. Why ? 427- 

 said of ? 428. What said of ? 429. What ? 430. What ? 



