262 



Mr. F. G. Jackson and Dr. Y, Harley. 



The average amount in Becquerel's, Eodies's, and Busk's cases of 

 sciu-yy in the human subject was 0-81, the smallest being 0-55 and the 

 largest 1'15 per cent. 



Garrod, in the analysis of the blood in one case of scurvy, found a 

 deficiency of the potassium salts, upon which he formed his well-known 

 theory that scurvy was due to their want. 



"We therefore see, in reference to this monkey, that the ash does not 

 tend to be decreased with the low specific gravity and diminution of 

 the total solids. It is apparent that the diminution in the total solids 

 is principally due to a lessening in the quantity of proteids. 



Conclusions. 



The descriptions brought forward in the first part, of several cases 

 of sciu'vy which occurred in the Arctic regions when the individuals 

 were under the influence of preserved or salted meats, in spite of their 

 taking at the same time either vegetables or lime juice, of the Nares 

 Polar Expedition, in which scurvy occurred, as well as the very 

 striking case of the six priests already mentioned, can^be compared on 

 the other hand with conditions of the greatest hardship and privation 

 in the Leigh Smith Expedition, Xansen and Johansen, and the 

 Frederick Jackson land part}', as well as in the instance given of the 

 Samoyads who -winter on Waigatz and who live on fresh meat ; in all of 

 M'hich cases, in spite of the entire absence of vegetables or even lime 

 juice, no sciu-vy occurred. 



If we look at this evidence alone we could almost say we have con- 

 clusive experimental evidence that the eating of salted or improperly 

 preserved meat, or tainted meat in any form, can produce sciu-vy, 

 even when lime juice or vegetables are being taken at the same time. 



AVe have also the support of the fact that bad ventilation, believed 

 by Dr. Neale to be one of the causes of scurvy, was not the cause of 

 scurvy with Dr. Xansen, li-^ing on fresh meat and blood — probably 

 owing to the fact that he introduced no ptomaine, and therefore na 

 scurvy occurred. 



AVe now come to consider the experiments on monkeys, and how 

 much or otherwise these experiments confirm the results already given 

 in man. It is necessary to consider what are the symptoms of scurvy. 

 In the present paper it is impossible to go through all the symptoms 

 of scurvy described by the various observers, since diff"erent epidemics 

 have shown more markedly various symptoms. We, however, can 

 compare the 'symptoms in oiu* monkeys with those generally described 

 as accompanying sciu"vy. The pallor and yellowish colour of the face,, 

 which is described as distinctive in scurvy, is of course impossible to 

 be observed in monkeys, although in those monkeys which we con 

 sider to sufi'er from scurvy there was generally a good deal of blue- 



