306 APPENDIX. 
D. 
APPENDIX TO CHAPTER IV. (p. 148). 
PTOMAINE OF THE MICROBE OF FOWL CHOLERA. 
Duclaux cites the following fact in his book, Ferments 
ef Maladies :—‘ If a fowl is inoculated with a few drops 
from a culture of fowl cholera, the bird sickens and dies; 
but if the liquid has been filtered before using it, through 
plaster or porous china, the disease produced is not fowl 
cholera. The bird rolls himself up and falls into a passing 
sleep, from which he is roused by the slightest noise. 
“ After a few hours, his recovery is complete. Thus 
there are two kinds of symptoms in fowl cholera, of which 
the most apparent is due toa species of narcotic (ptomaine) 
secreted by the microbe, but capable of independent action, 
and not in general ending fatally.” 
E. 
APPENDIX TO CHAPTER V. (p. 171). 
CESSPOOLS. SYSTEM OF CARRYING EVERYTHING TO THE 
SEWERS. 
This system, so long advocated in Paris by Durand- 
Claye, implies that the water should pour into the recep- 
tacles, so as constantly to flush the drain-pipes. A minimum 
of ten litres per diem to each inhabitant is necessary for 
this purpose. 
The household water and rain-water likewise pass 
