616 ANNUAL RECOKD OF SCIENCE AND INDUSTRY. 



to have been subjected to an elevated temperature, such as 

 that of a ball-room or a theatre, or to have engaged in vio- 

 lent muscular exercise : the cutaneous vessels are dilated, 

 and in a state more or less akin to paralysis, and in all cases 

 more slow to contract than usual. If at this moment the same 

 person be exposed abruptly and without any intermediate 

 transition to a low temperature, especially to a current of cold 

 air, a considerable loss of heat will be observed upon the surface 

 of the body. The blood which has been thus cooled externally 

 comes back into the internal organs and cools them suddenly; 

 which circumstance alone may, in an organ predisposed to dis- 

 ease, become the active cause of some severe malady. The cu- 

 taneous vessels, on their part, become contracted, driving out 

 the blood which they contained, and thus produce a kind of hy- 

 persemia, w^hich in itself may exercise a morbific action. This 

 cause, however, is usually only an accessory one, at least in 

 cases where the temperature has been much elevated. The ves- 

 sels have lost their tonicity, and do not contract suddenly. But 

 if the danger from collateral hyperemia is thus diminished, 

 that from refrigeration is increased. 8 B, Dec. 21, 1872, 592. 



CURE FOR CORNS. 



According to the Union Medicale^ corns may be cured, with 

 greater certainty and rapidity than in any other way, by sim- 

 ply applying, morning and evening, a drop of perchloride of 

 iron by means of a bit of straw. This treatment, continued for 

 fifteen days, will, in most cases, effect a cure without involving 

 any pain. 3 B, September 26, 1872, 106. 



BENEFITS OF VACCINATION. 



The small-pox epidemic has been very prevalent for some 

 time past in Vienna, and numerous cases are constantly occur- 

 ring, taxing the abilities of the medical profession and the 

 capacity of the various hospitals to the utmost. The benefit 

 of vaccination, however, is shown by the unanimous testimony 

 of those who have been most concerned in the treatment of 

 the disease. The general result is summed up as follows : 

 1. The mortality has been ten times greater in the un vacci- 

 nated than in the vaccinated. 2. The intensity of the disease 

 has also, as the general rule, been very much greater in them. 

 3. Cases of hemorrhagic small-pox occurred much more fre- 



