240 Transactions of the Royal Microscopical Society. 
terms to indicate, the innocent or more or less dangerous nature of 
the adulterated water can he ascertained, and, in case of need, 
demonstrated in a court of law. Not long ago, amongst a number 
of milk samples delivered to me for analysis by one of the Glamor- 
ganshire Food Inspectors, one was found to be not merely much 
adulterated with water, but the water employed for this admixture 
sold as “ new milk ” I ascertained to have been of a frightfully 
impure character, inasmuch as besides decomposing animal and 
vegetable matters, no less than eighty-seven living animalculae were 
counted in half a pint of this “ milk ” treated according to the plan 
here indicated. I certified the sample to be “ injurious to health,” 
and a fine of 31. and costs has effectually remedied this obvious 
danger to public health in the neighbourhood of Penarth. Since 
the conviction I have ascertained the source whence this foul and 
polluted water was obtained, wherewith the dealer was in the habit 
of “ improving ” the product of his cows. 
Upon a future occasion I hope to say a few words upon the 
method proposed by me for the critical examination of the organisms 
collected in the space of a few drops of water, but representing an 
infinitely larger hulk ; as also upon the comparison and tabulation 
of the results. For the moment, if I succeed in obtaining some 
expression of opinion upon the necessity which exists at present for 
a system of hydro-microscopy capable of yielding something like 
comparative results, my object will have been fully accomplished. 
