50 MILK SURVEY OF THE CITY OF ROCHESTER 



change in the methods of handling animals, we never saw this eye trouble 

 develop. We found even after the eyes could no longer be opened, we 

 could change the diet in connection with butter fats and with vegetable 

 fats, and if the animals were not too far gone, the introducion of milk 

 fats or egg yolk fats into the diet would cause a progressive reaction and 

 recovery, and frequently a complete recovery. It is possible even after 

 the eyes are so far deteriorated as to cause permanent blindness to cure 

 this condition by introducing butter fat or egg yolk fat into the diet. This 

 observation that I mention was first published in 1913, in June; and in 

 1913, in November, Dr. Osborne and Dr. Mendel of Yale published 

 essentially the same type of diet, extending the work somewhat by saying 

 cod liver oil would relieve his pathological state in just the same way 

 that butter fat or egg yolk fat did. 



"There are three types of diets which have succeeded both for ani- 

 mals and for men. The first of these is the type of diet which is entirely 

 derived from animal tissues. This is used by such animals as the lion, 

 the tiger; and such men as the Eskimo or the carniverous Indian of the 

 plains east of the Rocky Mountains in the days when the buffalo fur- 

 nished his sole food supply. Now, that does not mean that simply meat 

 eating is satisfactory. The Eskimo succeeds in living a fairly long period ; 

 they rarely reach a great age; never live a great age in terms of great 

 age of ours. He rarely lives 60 years, and he is an inefficient individual. 

 He succeeds, as we know from animal experimentation, because of 

 prodigal habits in the choice of food. The Eskimo, I know from the testi- 

 mony of a number of people, selects as the most appetizing portion of the 

 animal that he may kill for food, the blood. If he kills a reindeer, he 

 consumes his blood first of all. The American Indian on the Western 

 plains did the same thing, killing buffalo ; they liked warm, fresh blood. 

 The lion and tiger do the same thing. The second choice of food in the 

 carniverous animal is always one of the organs, such as the liver pr the 

 kidney or its nervous tissue. They will open the brain cavity or body 

 cavity and eat those organs second after the blood. The third choice of 

 the carniverous animal is the bone marrow or soft ends of the bone, the 

 same as man. The last choice of the carniverous animal is the muscle 

 tissue. That is the one which we in temperate regions living on both 

 an animal and vegetable diet, select as the most appetizing cuts of meat, 

 such as round steak, porterhouse steak, and roasts, and we do not like 

 the highly flavored glandular organs like the kidney stew every day or 

 the liver and bacon. This is a type of diet which succeeds in a measure. 

 Carniverous man like the carniverous animal, is lethargic after eating. 

 He disturbs himself only when he is hungry. Dr. Grenfall in his book 

 on Labrador says, the Whites will catch ten fish to the Eskimo's one. 



