312 THE MICROSCOPICAL NEWS. 
day’s sport. Our rivers also afford us many specimens if we are 
careful in selecting our hunting ground, and in concentrating our 
specimens. The following illustrations represent organisms taken 
from the Thames at Richmond, not, be it understood, a single 
Animal and Vegetable Productinna 
@zotaned in tbo warer of the Thames. thken « Riohmeed 
Fig. 73. 
Organto Mattor (livifg and dead), 
Gaprcially the Thames Paramoolum and hneh of whese. 
Fig. 74. 
dip of the water taken hap-hazard, but carefully filtered, whereby 
the excess water is allowed to escape, and the organisms brought 
into a smaller bulk. 
The water from service pipes requires to be very much con- 
centrated before anything can be obtained fit for examination. 
The fine linen bag should be tied round the tap, and the water 
allowed to run for some hours, the bag then being carefully washed 
into a conical test glass, and allowed to settle. Another method 
may be employed, viz., using a fine linen filter to Maignen’s 
“Filtre Rapide,” described in our first article. By this means the 
animal life suffers less than is the case when the hag is tied direct 
to the tap. The two next figures show what can be obtained from 
an ordinary service pipe by these means :— 
Water from Service-Pips. 
@, Branhiouns, D. Stentor Millen; ¢, Bursaria; d, Perammcium sorelia; 
@. Parammowum ap. , f, Orytricha ; g, Vortioslia convallaria; h, Colepe 
hirtus, 1, Pediastrum Boryanum; &,Sceusdermas sontus,/, Malosira variana, 
mM, Cyolotela operoulata; on, Nasroula ampbiatberna, 6, leore 
Nitaachia Sigmoides ; ¢, Frogmenta,of mnacnlar fibre, a, Starch 
‘Water from Service-Pips 
2, Paremaoia (3 species, b. Vorticalle convsiana, 0, Colepa hirtas; 
@, Pandorss Morum, e, Seonedeamus quadncands . f, Navouls Arphie. 
(i es spharopbors fh. Astenone!la formosa, Framlane aa P 
Capucivs ; wn active sporules, /, Stationary green sponiles ; ey 
A 5 Gorpuscles of whoat, (, Starob; uv, Hunk of wheat baire of whest 
fm, Threads of slender fungus. n, Orpmio earthy matter ; , Rarthy and latwinnar f 
® Aomilnla donee 
Fig. 75. Fig. 76. 
In judging of the quality of water from the results of a micro- 
