BIVALVE.--The question of the causation of typhoid fever by oysters created a great sensation last autumn, and it will doubtless do so again this year. Typhoid is infinitely more common in autumn than at any other season. It is caused by a definite well-known microbe, and it never occurs without the presence of this organism. The question of oysters conveying typhoid, therefore, depends upon the answer to the query, "Can the bacillus of typhoid live in the oyster?" It appears to be an undoubted fact that the living microbe can exist in the living oyster. Some men tried to prove that the organisms only occurred in oysters that were bad; but this was proved to be incorrect. Having decided that oysters can harbour the bacillus, the next question is--"How does the oyster obtain this microbe?" The answer to this is easy. The bacilli can only come from a patient with the disease, and so the oysters must obtain the poison from sewage. As far as we know oysters which are unable to feed on sewage matter cannot possibly obtain the typhoid poison. By no means everybody who swallows typhoid bacilli gets the fever. Typhoid is a distinctly infectious disease, but is rarely, if ever, caught from person to person as scarlet fever and small-pox are. The disease invariably results from taking food contaminated with sewage. Water is the chief vehicle by which the disease is spread, and therefore during epidemics of typhoid all water that is intended for drinking purposes should be boiled. Milk, watercress, oysters, salads, etc., also convey the disease. Milk is a common method of spreading typhoid, either by the milk being diluted with water, or else the cans having been carelessly washed out. Pure milk, absolutely free from water, cannot convey typhoid. Typhoid fever rarely attacks the same individual twice. EFFIE.--You can do nothing to alter the colour of your eye. It is not at all uncommon for the eyes to be of different colours, but nothing can be done to cure it.