ANT MAT, PRODUCTION. 905 



oxyliiityric ;ici(l is not formed in tlic body froin Icucin. or tliat at any rate if il 

 be firanted that theoretically leucin may yield isovaleric acid and tlie latter 

 /3-oxyhutyric acid, such a process does not take i)lMce (inantitatively in Hie body. 

 r.y far the larjier part of the acetone liodies excr(>led in the lU'ine are derived 

 from fat or fatty acids. 



Third treatise on the effects of borax and boric acid on the human system, 

 O. I-iKHRKini ( I.itntJoii: ./. d- A. ChurchUK JDOd. pii. V 1 1 1 + 1(1. (Jfpnx. ,?7). — In 

 this article, which is a translation from the (Jerman. tiie anthor liives a 

 critical review nf the experiments on tlie effects of horax made nnder the 

 ;iusiiices of tills Department < ll. S. It.. H'l. |i. <;nI| and disa.t,'rees willi Hie 

 jjeneral <-oiiclnsions wliich were readied. l-LarTu'r worlv h.is Iteeii pi'e\iously 

 reported ( K. S. K.. 1 1. i>. '.»f.l'). 



The occurrence and identification of soluble proteid in the feces of adults, 

 II. Scm.(')ssM.\N.\ [Zlxchr. J\liii. MnL. lUI iV.IOI]), />/>. .il.i-iit.'i: (ihs. in Zcnthl. 

 Gesani. Phiisi,,!. n. I'alli. Staff irrcli.scl.s. ii. scr.. 1 (1906), No. 23, p. 723). — 

 Aecordinj; to tlie .autlior. tlie proteids i>recii)itated from feces extract by acetic 

 acid consist veiy lart^ely of a complicated mixture of nucleo-proteids. with 

 nniciu under some circumstances. When large amounts of nucleiu are talcen 

 in the food the feces of healthy adults do not contain an increased amount of 

 nucleo-proteids. lait with children such an increase is noted. The author's 

 investigations also include the pathology of the subject. 



The phosphorus content of feces fat, J. H. Long and W. A. Johnson (Jour. 

 Ajiicr. CJiciii. Sac. .^S (]!)0()). \(i. 10. pp. 1 'i99-l'}03) . — Continuing earlier work 

 (E. v*^. R.. IS, ]). ry2~)) the i)hosi)horus content of feces fat was studied. The fat 

 content of S samples ranged from ,S.<) per cent to 19.45 per cent on the dry- 

 matter basis, and the I'.Os content of the fat from 0.2 per cent to I^.ftt! per cent. 



" Extreme variations are shown in the percentage amounts of phosphoric acid 

 recovered from the f;it. As found before, these amounts are not increased by 

 prolonged extraction." 



As regards the source of the fats containing phosphorus the authors note 

 that they may either represent unchanged substances from animal and vegetable 

 foods or may represent products of metabolism within the body. The possi- 

 bility of intestinal bacteria as a source of feces fat is also spoken of. The 

 authors state that the investigations will be continued. 



ANIMAL PRODUCTION. 



Investigation of concentrated commercial feed stuffs as sold in Iowa, 

 L. (I. MiciiAKi, (fnird Sill, liitl. si;, pp. :,j).—.\. large number of commercial 

 feeding stuffs collected in Iowa were analyze(!. including blood meal, tankage, 

 and sinnlar products, cotton-seed meal. linseed meal, wheat shorts or standard 

 middlings, ijuiir middlings, mixed wlieat feed, low grade or red dog flour, 

 hominy U"'i\. cern .and oat cliop, rnrn-aiid-<(ili meal, corn meal, mixed alfalfa 

 feeds, oat sliorts. oat l»ran, oat Hour, oat middlings, germ oil meal, pressed 

 cracklings, germ meal, and gluten feed. 



The samples of blood meal received during the year, the author states, ran 

 below the percentage of protein guaranteed by the manufacturers, and the same 

 was true of tankage. 



" Meat meal, also guaranteed to contain <i() jur cent protein, has averaged 2.i;-5 

 per cent below that standard, one sample dropping as low as 52.47 per cent. 

 Both jiroducts. stated to be free from stomach contents, have been found to 

 contain undigested oat hulls or hair. Even as high as 4.4 per cent of silica (the 

 basic constituent of sand) has been found in some samples. 



