: 



I. 2. i. 1 8. ' OF IRRITATION. 61 



the whole fanguiferous fyftem, or death. The blue colour of 

 fome children's arms or faces in very cold weather is owing in 

 manner to the torpor of the abforbent terminations of the 

 the veins, whence the blood is accumulated in them, and fome- 

 times burfis them. See Hsemorrhagia venofa, and Suppl. i. 2. 7. 



In forne cafes of fever attended with petechise, Dr. HalJ, of 

 Colcheil'er, directed the body to be warned with cold vinegar and 

 water twice a day, with great advantage. The petechise became 

 aily lefs numerous and lefs livid, the pulfe flower and ftrong- 

 r, with lefs delirium, and more fieep. 'He has treated twenty 

 cafes in this manner, and not loft one. JVledical Review, Vol. 

 III. p. 8. 



In thefe cafes not only the application of external cold feems 

 to have been of iervice, by preventing the unneceiTary expendi- 

 ture of animal power ; but as the flimulus of vinegar renders 

 the lips pale, when applied externally, and in confequence ftim- 

 ulates the terminations of the veins into greater action j it feems 

 alfo to have contributed to remove the Petechise. 



1 8. Aneurifma. Ar r eurifm is probably owing to the want of 

 due irritability of a part of the coat of an artery. As living 

 raufclesare known to refift diruption more than dead ones, ac- 

 cording to the experiments (I think) of Dr. Langrifh, it follows 

 that when a part of the coat of an artery ceafes to contract by 

 the (limulusof the blood, that it will foon become diftended by 

 the force of it, till it widens into a fack, and at laft becomes 

 ruptured. 



M. M. Venefedion repeatedly in fmall quantities. Reft. 

 Diluent, mild nutriment. Daily evacuation by a pill confifting 

 of rhubarb eight grains, and foap four grains. 



It is poflible alfo, that an aneurifrn may be produced by the 

 reliftance to the circulation, and the force of the heart being 

 greater than the fides of the arteries can counterbalance. 



Mr. Gimbernat is faid to have cured fome cafes of aneurifm 

 in the popliteal artery by comprefTmg it by means of an adapted 

 machine, confifting of a fteel ring above and below the knee, 

 which are joined by a plate, beneath which is placed a proper 

 cufhion, which can be preffed on the diftended part of the arte- 

 ry more or lefs by of means a fcrew. The other method of cure 

 is by a double ligature above the aneurifm, as firft pra&ifed by 

 Mr. J. Hunter. 



19. Varlx. The varix of veins occurs frequently in the legs 

 of women, poflibly fometimes from tight garters, and has for its 

 proximate caufe the inirritability of the coat of the vein ; whence 

 it becomes diibnded, till it burits, by the power with which the 



blood 



