205 
(■ cl ) In America . — With the exception of Mr. Thompson, who died 
in January, 1906, from “bilateral pneumonia following influenza,” 
and about whose medical history, qua Mediterranean fever, no evi- 
dence can be obtained, only 1 person — a woman at the quarantine 
station — took the milk in any quantity. She, however, drank the 
mixed milk from several goats for a considerable period, and in De- 
cember, 1905, suffered from a typical attack of Mediterranean fever. 
3. THE RESULTS. 
In summarizing the result of this unpremeditated experiment sev- 
eral factors have to be considered. For instance, a certain unknown 
number of goats — more, however, than 2 — were shown to be secreting 
infective milk after their arrival in America, some three months after 
leaving Malta, but there is no direct evidence as to the number whose 
milk contained M. melitensis during the voyage in summer weather 
from Malta to Antwerp. Arguing from analogy with average 
Maltese herds, at least 6 should have been secreting infective milk. 
The goats purchased by Mr. Thompson were, however, picked ani- 
mals and heavy milkers, and as experience has shown that the goats 
yielding the most milk in any given herd are the most likely to be 
passing M. melitensis in their milk, the probability is that in this par- 
ticular herd of 60 milch goats (1 having died the day after leaving 
Malta) the milk from considerably more than 6 was heavily infected— 
an inference which receives confirmation from the fact that the 6 
officers and the steward who drank “ mixed ” milk each developed an 
attack of Mediterranean fever, the remaining officer and the cabin 
boy, with whom the milk disagreed and who consequently did not 
drink it, remained well. 
The members of the crew, on the other hand, each drank u whole ” 
milk from a single goat, and apart from the possibilities of the milk 
being supplied on any particular occasion from an uninfected ani- 
mal, a reference to Section I (3), shows clearly the possibilities of 
a man who obtains milk, even from an infected animal, avoiding the 
ingestion of infective milk. 
Apart from such considerations, however, it suffices to state the 
net result as follows : 
Of 23® men on board the steamship Joshua Nicholson who drank 
on one or more occasions presumably infected milk, no evidence what- 
ever is available as to 12 and no relevant information as to Mr. 
Thompson; of the remaining 10, 1 suffered from hernia only, 1 
was infected by M. melitensis at an unknown date, while" 8 suffered 
® That is disregarding the 2 men who boiled the milk before drinking it, 
and the officer and cabin boy who did not drink the milk. 
