DEODORIZER OF SEWAGE. 
31 
speaking of the animal’s general health, &c., the owner 
asked me what grass it was, as the dog seemed to prefer 
that to any other. I soon ascertained, by a slight examina¬ 
tion of its leaves and root, that it was the Triticum repens , or 
common twitch. This grass is eaten by dogs to cause 
vomition, which is probably produced by the roughness of 
its leaves mechanically irritating the fauces. 
( To be continued .) 
Facts and Observations, 
POISONOUS SAUSAGES. 
Recently we directed the attention of our readers to the 
poison developed in meat that has been long kept. ( See last 
vol., pp. 480—520.) Lately, in the neighbourhood of London, 
several persons have been seriously affected, and one person 
died, with vomiting and dysentery, after partaking of sausages 
purchased in Newgate Market, the meat of which was found 
by Dr. Letheby, to be in a putrid state. It is probable that 
this hereafter will be added to the number of instances of an 
animal poison being developed in diseased and putrid meat. 
As illustrative of what other causes may be in operation 
to render food deleterious, we find the following in the Stam¬ 
ford Mercury : “ About a fortnight ago, a farmer in the fens, 
having cooked his mangolds and potatoes for his pigs in the 
furnace in which he had just before dressed his seed-wheat 
w ith mercury, the poor animals soon exhibited unmistakeable 
symptoms of having been poisoned, whereupon this con¬ 
scientious farmer at once cut their throats, dressed them, and 
sent them off to London, where they w : ere sold for about a 
shilling a stone.” 
DEODORIZER OE SEWAGE. 
D rs. Hofmann and Frankland in their report to the 
Metropolitan Board of Works, state that, of all agents em¬ 
ployed for disinfecting sewage-w 7 ater, the perchloride of iron 
stands the highest in value, next will come chloride of lime, 
and lastly lime. 
Three equal quantities of sewage w 7 ere severally acted upon 
by these agents; after three days, the lime sew 7 age had be- 
