49G 



EXPERIMENT STATION RECORD. 



pp. 51). — For tlie information of American packers and exporters, a translation of 

 the (ierman otlicial regnlations and proclamations which have a direct ])earing upon 

 the meat-inspection law have been ])ublished. The translation is accompanied by 

 the orijrinal < Jerman text. 



Encyclopedia of household enconomy, Emily Holt {Neir York: McCiure, Phil- 

 lips <t* Co., 1903, ])}). 381, pis. 11). — This volume includes useful information on cook- 

 ing, preservation of fruits, vegetables, etc., sanitation, water supply, and other topics 

 connected with the household. 



ANIMAL PRODUCTION. 



The status of phosphorus in certain food materials and animal by-prod- 

 ucts, with special reference to the presence of inorganic forms, E. B. Hart 



and \V. H. Andrews {Xew York State Sta. Bui. ^38, pp. 181-196). — It is apparently 

 quite generally believed that phosphorus exists in vegetable products partly in 

 organic compounds and partly as inorganic salts. With a view to determining the 

 correctness of this belief the authors studied the character of the phosphorus bodies 

 in a number of animal and vegetable products. 



Different methods of separating and estimating organic and inorganic phosphorus 

 were tested and compared, that finally adopted depending upon the solubility of 

 phosphorus compounds in hydrochloric acid. Samples of suital)le size are treated 

 with this reagent, and the inorganic phosphorus and the total phosphorus removed 

 by it are determined in aliquot portions of the extract, the total soluble phosphorus 

 by the Neumann method, and the inorganic phosphorus as magnesium pyrophos- 

 phate, minimum amounts of nitric acid being added to insure quantitative separation 

 of ammonium phospho-molybdate and to prevent the cleavage of the organic phos- 

 phorus compounds into organic and inorganic radicals. Any phosphorus in the 

 original substance undissolved by the reagent used is assumed to exist in organic 

 compounds as nucleo-proteids, nucleins, and lecithins, and its amount is directly 

 determined, as is also the total phosphorus in the materials studied. 



The following table shows the amounts of different kinds of phosphorus com- 

 pounds in a number of materials as determined by the method outlined, and for 

 comparison the results obtained by similar methods, water and dilute acetic acid 

 being used as solvents: 



Forms of phosjjhorus in a numher of feeding stuffs and in feces. 



Substance. 



Oats 



Bran (wheat) ... 



Malt sprouts 



Brewers' grains. . 

 Distillers' grains 



Corn 



Alfalfa 



Linseed meal 



Oat straw 



Wheat 



Blood 



Meat meal 



Liver-meat meal 

 Cow feces 



Total 

 phos- 

 phorus. 



Per cent. 



0.355 



1.548 



.677 



.421 



.307 



.313 



.266 



.789 



.135 



.390 



.123 



4.073 



1.034 



.344 



In aqueous extract. 



Total 

 soluble 



phos- 

 phorus. 



Inor- 

 ganic 

 phos- 

 phorus. 



In acetic-acid ex- 

 tract. 



Total 

 soluble 



phos- 

 phorus. 



Per cent. 

 0.114 

 I.IOC 

 .489 

 .039 

 .104 

 .203 

 .182 

 .327 

 .095 

 .174 

 .028 



Inor- 

 ganic 

 phos- 

 phorus. 



Per cent. 



In hydrochloric- 

 acid extract. 



0. 055 

 .279 

 .007 

 .005 



.079 

 .085 

 .028 

 .040 

 .010 



Total 

 soluble 



phos- 

 phorus. 



Per cent. 

 0.096 

 .951 

 .477 

 .040 

 .069 

 .177 

 .180 

 .195 

 .086 

 .172 

 .054 

 1.387 

 .486 

 .148 



Inor- 

 ganic 

 phos- 

 phorus. 



Per cent. 



0.036 

 .017 

 .009 

 .007 



.079 

 .088 

 .009 



.098 

 .005 

 .004 



