296 PROCEEDINGS OF THE VICTORIA INSTITUTE. 
Gulf which was owing to trees having overgrown the whole city. 
Too many trees should not be let grow near the houses and he 
pointed- out both these things made for disease. He pointed out 
that in most of the h.ouses occupied by gentlemen from the Main 
in Port-of Spain precautions were taken not only to concrete the 
foundations but also the yards. This was a most wise precau- 
tion as it prevented not only rain water soaking into the houso 
but subsoil water from getting into it and the universal adoption 
of this precaution was well worthy of consideration. He thought 
Dr. Prada dealt with the sewerage question in a very happy 
manner, and he supported the idea of such a system. He 
instanced the case of Port Louis, Mauritius, as a city where the 
advantage of a sewerage system had been proved. The work 
was done by Mr. Chadwick, whose plans were very similar to 
those he had prepared for the drainage of Port-of-Spain and in 
reply to a question previously asked by the Chairman, Dr. Lovell 
said that Mr. Chadwick’s scheme provided for the separation of 
storm water from sewerage water, and between the two there 
would be no connection. There was no storm water admitted to 
enter the sewerage pipes whatever. To allow this would be a 
very great objection indeed. Dr. Lovell went on to speak of the 
enormously good work done in Port-of-Spain in scavenging by 
the corbeaux and expressed his pleasure that these invaluable 
birds had not become less prevalent since their Government pro- 
tection had been withdrawn. 
Mr. Bourne said he had not realized as he perhaps ought to 
have done that the chemical analysis of water gave no infor- 
mation whether as to bacteriological contamination and perhaps 
should not have been aware of it until an actual outbreak oi 
epidemic. He wished to know how far the human animal coul< 
have bacteria communicated to him by cattle. Very little** 
he supposed. And Dr. Prada he noticed only recommended 
one filterer, the Pasteur. Was this an adequate substitute for 
the boiling of water or would not the boiling of water always be 
a judicious precaution even where the Pasteur filter was used r 
The lecturer said contamination from cattle would be p u,e J-' 
organic and by them he did not think any disease germ would 
be communicated to man. With the Pasteur filterer it was un- 
necessary to boil water. It was a perfect filterer and it bj 
been tested with bacteria and most thoroughly and impartia V 
in every way. 
Mr. Mntlian confessed that from being a sceptic he h a< i 
become absolutely convinced of the positive necessity ° ® 
sewage system for Port-of-Spain. At first he was frightened 
y the knowledge that the town was perfectly saturated 
