.CLASS IV. 2. 2. 11. OF ASSOCIATION. 421 



11. Testium dolor nephriticus. The pain and retraction of the 

 testicle on the same side, when there is a stone in the ureter, is 

 to be ascribed to sensitive association; whether the connecting 

 cause be a branch of the same nerve, or from membranes, which 

 have been frequently affected at the same time. 



12. Dolor digiti minimi sympatheticus. When any one acci- 

 dentally strikes his elbow against any hard body, a tingling pain 

 runs down to the little finger end. This is owing to sensitive 

 association of motions by means of the same branch of a nerve, 

 as in hemicrania from a decaying tooth, the pain is owing to the 

 sensitive association of tendons or membranes. 



13. Dolor brachii in hydrope pectoris. The pain in the left arm 

 which attends some dropsies of the chest, is explained in Sect. 

 XXIX. 5. 2. 10. which resembles the pain of the little finger from 

 a percussion of the nerve at the elbow in the preceding article. 

 A numbness of this kind is produced over the whole leg, when 

 the crural nerve is much compressed by sitting for a time with 

 one leg crossed over the other. 



Mr. , about sixty, had for two years been affected with 



difficulty of respiration on any exertion, with pain about the ster- 

 num, and of his left arm; which last was more considerable than 

 is usual in dropsy of the chest; some months ago the pain of his 

 arm, after walking a mile or two, became excessive, with coldness 

 and numbness; and on the next day the back of the hand, and a 

 part of the arm swelled and became inflamed, which relieved the 



S>ain; and was taken for the gout, and continued several days, 

 le after some months became dropsical both in respect to his 

 chest and limbs, and was six or seven times perfectly relieved by 

 one dram of saturated tincture of digitalis, taken two or three 

 times a day for a few days in a glass of peppermint water. He 

 afterwards breathed oxygen gas undiluted, in the quantity of six 

 or eight gallons a day for three or four weeks without any effect, 

 and sunk at length from general debility. 



In this instructive case I imagine the pressure or stimulus of one 

 part of the nerve within the chest caused the other part, which 

 serves the arm, to become torpid, and consequently cold by sym- 

 pathy; and that the inflammation was the consequence of the 

 previous torpor and coldness of the arm, in the same manner as 

 the swelling and inflammation of the cheek in tooth-ach, in the 

 first species of this genus; and that many rheumatic inflammations 

 are thus produced by sympathy with some distant part. 



14. Diarrhoea a dentitione. The diarrhoea, which frequently 

 attends dentition, is the consequence of indigestion; the aliment 

 acquires chemical changes, and by its acidity acts as a cathartic; 

 and changes the yellow bile into green, which is evacuated along 



