ISS5-1 
and other Manufactured Articles. 523 
use among us. There is no longer room for doubt of the 
tiuth of this assertion in the minds of those who have 
caiefully inquired into the subject. Nevertheless public 
feeling has not been aroused, at least to an extent sufficient 
to produce any very marked effedt in diminution of the evils 
which the physician and the chemist have from time to 
time endeavoured to bring prominently into notice. 
In the investigation of an obscure or hidden disease the 
medical man, in any and every case, is given to associate 
fadts and group together symptoms ; and should he find that 
these recur in pretty much the same order, in a number of 
cases, and if some distindt or special pathological condition 
is seen to underlie them and constantly reproduce them, 
then he considers that he is justified in regarding them as 
an unmistakable indication of cause and effedt. By careful 
observation it has been found that wall-papers coloured by 
arsenical pigments will produce, and do produce, a series of 
symptoms of poisoning which are not only significant, but 
perfedtly conclusive of poisoning by their agency. 
It is a well-recognised fadt that those persons who are 
“ susceptible” to the adtion of such potent toxic agents as 
arsenic, and who may be compelled to occupy a bed-room 
the walls of which are covered by an arsenical paper, will 
certainly suffer in health therefrom. That this is so receives 
additional^ strength from the fadt that immediate relief from 
a series of distressing symptoms is experienced on removal 
from the room and its surroundings, and which always recur 
on their returning to the apartment, or even to the house. 
It is a fadt, then, that sufferers from arsenical wall-paper 
poisoning invariably experience perfedt relief from all their 
distressing symptoms on trying change of air, — nay more, 
by changing one room for another. Any permanent change 
produces a cure. But on their returning to the influences 
or surroundings which were the original cause of the illness, 
they just as surely experience the same train of distressing 
symptoms which in the first place was the cause of the 
“ mysterious illness.” 
It may readily be surmised, from these few introductory 
observations, that the question of arsenical poisoning is in 
many respedts an important one for individuals and for 
households. From the large number of cases of poisoning 
already made known by the medical profession and by ana- 
lytical chemists, I gather that the evil is widespread, and 
the danger arising therefrom can in no way be exaggerated. 
The late eminent chemist and toxicologist Dr. Alfred 
Taylor was the first to put the public on its guard against 
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