21. Sur leg caracteres et l’origine deg Flores alpines, et 
particulierement sur les causes qui eu out limite l’extension. 
22. Sur les procedes pour obtenir une evaluation fixe des 
grossissements microscopiques. 
M. P. Le Miere lit un extrait du Saturday Review du 23 
Aout dernier, signalant une epidemic de fievre typhoide ayant 
eclate a Mary leb one et dont la cause a etc attribute a l’usage 
du lait de vache, qui avait etc conserve dans des vases mal 
nettoyes — et mis en vente immediatement. M. Le Miere 
reproduit ce fait, parce qu’il peut avoir lieu ici oil les indiens 
qui elevent des vaclies, s’inquietent peu ou pas du tout des 
soins a prendre, de la plus ou moins grande proprete des 
vases ou le lait de leurs vaclies est depose et de la qualite 
des eaux dont ils se servent. 
Voici l’extrait en question : 
“ It is seldom that an epidemic is so clearly traced to its 
cause as in the case of the late outbreak of typhoid fever in 
Marylebone. In nearly every instance the families in which 
typhoid fever has appeared have been supplied with milk 
from the same dairy, and in several of the few instances in 
which the disease has attacked families not supplied from this 
dairy, it has since been discovered that the sufferers have ac 
ci dentally been brought in contact with it. When the farms 
from which this dairy obtains its milk came to be inspected, 
one of them turned out to have all the conditions necessary 
for the production of typhoid fever. The milk cans were 
washed with water drawn from a well that “ has long been 
condemned by the medical man as unfit to drink, and is, in 
fact obviously impure both to eyes and nose.” The dairy 
well on one farm became contaminated with sewage in which 
