SECRETIONS AND EXCRETIONS. 235 



which are named after their originators, Ewald and 



Boas. 



Test-break- Consists of from 35 to 70 grams (2 ounces) 



FAST OF of wheat bread, and of 300 to 400 cu. cm. 



Ewald AND (ji to 2 glasses) of water, or weak tea 



Boas. without sugar. 



Consists of oatmeal soup, prepared by 

 Test-break- boihng down to 500 cu. cm. (17 fluid 

 fast of Boas, ounces) one liter (quart) of w^ater to which 



one tablespoonful of rolled oats has been 

 added. A little salt may be added, but nothing more. 



Soup 400 cu. cm. (2 glasses), beefsteak 

 Test-dinner 200 grams (7 ounces), wheat bread 50 

 OF RiEGEL. grams (i| ounces), water 200 cu. cm. (i 



glass). Finely chopped meat may be sub- 

 stituted for the beefsteak. 



Besides the contents already mentioned 

 Ingredients, above, the vomit always contains more 



or less mucus and saliva. Food in all 

 stages of digestion will be noticed, and, if present, the 

 segments (proglottides) of tape-worms, the adult round 

 worm (ascaris lumbricoides), and the thread-like 

 trichinae. Foreign indigestible objects, which have 

 been swallowed, may be discovered, such as pins, 

 needles, whistles, etc. These are found most often in 

 the vomit of children, the insane, and in hysterical 

 subjects. In the last class of patients the most rigid 

 surveillance must be practised to prevent deception. 



