124 TYPICAL QUEENSLAND LAGOON 
if delivered to consumers by the pipes of any water system 
in Australia. Not only is the purified lagoon water excellent 
for drinking purposes, but it is also eminently suitable for 
other uses ; its softness and freedom from colour rendering 
it especially desirable for laundry work and steam raising. 
It is evident from the results of these investigations 
that the purification of waters of this type is not by any means 
the impossibility which tradition has taught us to imagine it. 
In the course of these investigations, I have frequently 
found it necessary to obtain the advice of several of my 
friends, better versed than myself in various phases of this 
subject, and I seize this opportunity of expressing my grat- 
itude to these and all others who have rendered me assist- 
ance. 
Appanpix I. 
LIST OF AQUATIC PLANTS IN LAGOON. 
Names Suppriep py F. M. Batuny, F.L.8., Cotomran BorTanist. 
Utricularia flexuosa. 
Hydrilla verticillata. 
Myriophyllum verrucosum, 
Myriophyllum variaefolium. 
Jussiaea repens. 
Ottelia ovalifofia. 
Marsilea Brownii. 
Kelipta alba. 
Cyperus exaltata. 
Polygonum lapathifolium, 
Polygonum attenuatum. 
Limnanthemum indicum. 
Nymphza gigantea. 
Nymphwa. flava. 
Azolla rubra 
