Disinfecting Powers of Increased Temperatures. 115 
1. A waistcoat, which had been worn all night by the elder Ger- 
rard, a day or two after the appearance of the scarlet eruption, was 
heated four hours and a half at 204° Fahrenheit, and on the 8th of 
November, was applied to the body of a boy, et. six years. No 
symptom having shown itself on the 15th, a second waistcoat was 
then applied to him, which had been worn more than twelve hours 
by Johnston on the second day of the scarlet efflorescence, and then 
heated at temperatures varying from 200° to 204° Fahrenheit, du- 
ring two hours and three quarters. After an interval of twenty-two 
days the boy, who still continued to wear the same waistcoat, remain- 
ed perfectly well. . 
2. A waistcoat, which had been worn twenty-two hours by the 
elder Gerrard on the fourth and fith days after the appearance of the 
eruption, was on the 19th of November heated three hours at 204°. 
It was, after this, worn by a girl, aged twelve years, ull the 30th, 
without effect. Another waistcoat, which had been worn by Sarah 
Gerrard, was then substituted but without any effect ensuing. | 
3. A waistcoat, put on by Sarah Gerrard on the second day of 
the efflorescence and worn by her for three days, was applied, Nov. 
19th, after it had been heated two hours at 200°, to the body of a 
boy aged ten years. On the 30th a second waistcoat, which had 
been worn by Robert Green during the first and second days of the 
eruption, and which had been kept in the disinfecting apparatus at 
204° during one hour only, was substituted; but no symptoms of 
infection have appeared. 
4. A waistcoat, which had been worn by the elder Gerrard sev- 
enteen hours on the 7th and 8th of November, (the second and third 
days of the eruption, ) was kept closely corked up in a bottle till the 
25th, then heated four hours anda half, at temperatures varying 
from 200° to 206°, and applied to a girl aged thirteen years. On 
the 30th of November, no effect having been produced, another 
waistcoat was substituted, which had been worn eleven hours by 
Johnston on the third day of the efflorescence, and then disinfected 
by a temperature of 204° applied during two hours. No symptoms 
of scarlatina have shown themselves in this case. 
In all the foregoing intances, it was ascertained by the most care- 
ful inquiries that the children, to whom the disinfected waistcoats 
were applied, had never been affected with the scarlatina, and there- 
