42 



TABLE IV. 

 SEA WATER. 



Immediately after infection . 2,470,000 B. typhosus per 1 c.c. 



24 hours . 1,530,000 



1 day after change . . >. 13,180 



2 days yj. . . 10,580 



^ }) ".: -"- ,, ,, 



6 >, ',{. ;. per T ^ c.c. 



* J) J> 53 *!. ; ,, ,, 



WET OYSTERS. 



Oyster 1 after 1 day in infected water, 95,800 B. typh. per oyster. 

 3 after 2 days in clean water, 752,800 ,, 



5 5> 4 )) )3 1200 ,, ,, 



7 6 200 



JJ ** ' 



13 9 ,, 390 ,, 



15 ,,11 per i part of oyster. 



DRY OYSTERS. 



Oyster 2 after 2 days dry . . 58,700 B. typhosus per oyster. 



,, 4 4 . . 17,400 



6 6 . . 37,900 



8 . 7 ,, . . 1,300 



10 11 . . Innumerable; abnormal. 



The foregoing experiments, confirmatory as they have 

 been to one another, all point in the same direction, and 

 are, I think, without further repetition, sufficient for drawing 

 some general conclusions. 



In the first place, it is clearly shown that oysters during 

 the period these experiments were carried out, viz., September, 

 October, and November that is, when oysters are in a fit 

 state for consumption and there is no reason why the 

 same should not be applied to the oysters during the rest 



