FOODS TrtJMAN NUTRTTTON. 661 



In IK) CISC \\;is orpiiiic jjlutsplionis found in llic urine cxcn when mu extra 

 amount of ni'Lcanic pliospliorus was in.iicstcd. 



Tlic m'calci- pari of tlic i)liospliorus. wlict her or^'anlf or inor^'anic, was 

 cxcri'tcd throu.uh the i<iilni'ys. 



Nitrogenous metabolism as affected by diet and by alkaline diuretics, 

 II. D. IIakki.ns (./o»r. lii'il. Clicni.. 2 ( IDOd), Xo. .i, m). ,2/7-ii.'M-— The rations 

 selected included a low diel made \\\\ of vegetable foods with a little millc and 

 cream and considerahle butter, a "standard" diet fiirnishin.;; about l.l <xm. of 

 nitro.iren and made up of vegetable foods and nulk and eggs in consideraI)le ((uan- 

 tity. a " iieavy " diet sinular in character to the "standard" diet and furnishing 

 '-.', gm. of nitrogen, and a meat diet which contained about '-VM gm. of very lean 

 chopped beefsteak beside nnlk. butter, bread, and dates. One of the '•'< men who 

 served as subjects also followed a purin-free diet for several days. With this 

 sui>Jcct no account was kei»t of the fu(>l value of this ration, but the author con- 

 siders that his diets were deficient in energy. With the other 2 subjects the 

 fuel value of the diet was calculated to be about 8,000 calories. 



Neither sodium citrate nor sodium bicarbonate, when added to the ration, 

 intluenced the total nitrogen excretion. They also failed to cause diuresis. 



" The sudden change to a low diet caused in each experiment an initial fall 

 in body weight, but this was quickly recovered from in both cases where the 

 fuel value was sulficient. The weight of these 2 men increased slightly on 

 the heavier diet." The subject whose diet was deficient in energy lost steadily 

 throughout the exjjeriment until the meat diet was begun. 



The recorded data "show that nitrogenous equilibrium is quickly secured 

 if the nitrogen intake does not drop below 5 gm., as others have also observed. 

 The nitrogen excretion remains fairly constant at 5 to 6 gm. even when the 

 food nitrogen drops below that amount. ... On the standard and ou the meat 

 diet an approximate nitrogenous equilibrium was readily obtained ; on the 

 heavy diet, however, equilibrium was not secured, Ki gm. being the maximum 

 nitrogen excretion." 



In these experiments tlu> alkalies studied decreased the ammonia excretions 

 very markedly under all conditions of diet, the ammonia being usually reduced 

 to one-third of the amount normally excreted. At the same time the urea 

 excretion was increased, the amount corresi)ouding roughly to the decrease in 

 tlie anunonia excretion. 



The metabolism of creatin and creatinin, O. Folin {Brit. Med. Jour., 1906, 

 \(i. 2.i'.)'.). IK ns7 ). — The (-(inclusions drawn from the data presented at the meet- 

 ing of the British Medical Association at Toi'onto, 190(i, follow : 



" There is no experimental evidence showing that creatin is the inunediat*! 

 jirecursor of the creatinin appearing in tbe urine. 



" P.iologic.-illy tbere seems to be a fundamental difference between creatinin 

 and creatin. 



" In the author's opinion it is not yet clear whether creatin is a waste i)roduct 

 or a food." 



Carbohydrate metabolism, F. W. Pavy (London: J. cG A. Churchill; Phihi- 

 ddpliiii: /'. Jlhihisf, til's S(jn tl- Co., 1906, pp. XfI+13S pis. S). — This volume 

 contains a course of lectures given at the Tniversity of London in 100." and is 

 largely made uji of the author's exp(>riments and his deductions and conclusions 

 from tbeiu. The subject is discussed from a physiological and a pathological 

 staudjioint. 



Some properties of the albumens present in duck egg white, A. Panokmow 

 {Zhiir. A'^.s.v. /■'/,:. Khiiii. OJishch.. .il il'.i<i.'i\. jip. !i.i.3-9.31 ; ahs. in Ztschr. f'nter- 

 sitch. Nahr. u. Gcnunumtl., 12 {19(16). Vo. //, pp. 66.'), 666). — Two albumen.s. 



