162 PROCEEDINGS OP THE AMERICAN ACADEMY. 



continued to occupy the room, but the pain in the bowels became 

 more frequent, and on July 27 diarrhoea set in. July 28, the room 

 was changed for one in which the paper contained 46.8 mgr. per sq. m. 

 (O.G gr. per sq. yd.), and on the next day Mr. C. was called away. 



Returned in a day or two, and occupied the second room with 

 marked improvement, which continued. August 3 (19 days), the urine 

 contained 0.021 mgr. per litre. During the rest of the month there 

 was no recurrence of indigestion except on one day, August 19. The 

 urine of this day was collected, and a sample was also taken some time 

 after leaving the house. Both shared the fate of those mentioned in 

 the previous case. 



Though the second room was arsenical, the apparent exemption 

 from its effect was perhaps due to the lesser amount, perhaps to the 

 difference in the compound of arsenic on the walls. The second room 

 was also better aired than the first. 



Case 3. Mr. D., after living in a room which contained no wall 

 paper, removed to another house and occupied a room in which the pa- 

 per, a dark red, contained 110.4 mgr. per sq. m. (1.42 gr. per sq. yd.). 

 About a month after moving, Mr. D. began to be troubled with 

 severe headaches, which were attributed by one physician to change of 

 locality. These headaches continued for some weeks, and in addition 

 there was trouble with the eyes and throat. Another physician sus- 

 pecting arsenical poisoning, the paper was examined. Other papers 

 in the house contained arsenic but were only qualitatively analyzed, 

 and contained less than that of the room in question. February 12, 

 1886, the urine contained 0.015 mgr. arsenious oxide per litre. The 

 paper was removed and a non-arsenical paper substituted. Im- 

 provement began at once, and the headaches soon disappeared. Here 

 again was an apparently very slow elimination as on June 18 (127 

 days) the urine contained 0.003 mgr. per litre. 



Case 4. Miss E. occupied a room with a light blue paper contain- 

 ing 842 mgr. per sq. m. (10.78 gr. per sq. yd). The windows were 

 hung with blue cretonne curtains, with flowers and leaves in red, 

 yellow, and green, containing 309 mgr. per sq. m. (3.9 gr. per sq. yd.). 

 No symptoms of this case have been given to me except a long con- 

 tinued inflammation of the eyes, continual lassitude and weakness, 

 and trouble with the throat. The patient, a girl in robust health, 

 became weak and nervously prostrated. The urine examined March 

 10, 1886, contained 0.02 mgr. arsenious oxide per litre. Miss E. was 

 sent away and rapidly improved in general health. The arsenical 

 paper and hangings were removed and replaced by non-arsenical 



