10 



EXPERIMENT STATION KECOKD. 



suiting products were compared with those of the original oils. The hy- 

 drogenated oils gave the respective color reactions for marine animal and seed 

 oils, although Halphen's and Milleau's reactions for cotton-seed and kapok-seed 

 oils in the hardened fats made therefrom gave negative results. Nickel was 

 present in all of the products. 



The catalytic reduction of oleic acid and cotton-seed oil by means of 

 hydrogen in presence of finely divided nickel, T. W. A. Shaw (Jonr. Soc. 

 Chem. Indus., 33 (1911,), No. 15, pp. 711-774, figs. 2).— A digest of the data 



obtained by hydrogenating oleic acid 

 and cotton-seetl oil at diminished and 

 increased pressures. 



A new and improved form of Kjeldahl 

 distillation apparatus, A. D. Holmes 

 (Jour. Indus, ami Enfjin. Chcm., 6 (lOlJf), 

 No. 12, pp. 1010-1012, figs. 3; 7 (1915), 

 No. S. pp. 693, 69.',, fig. l).—\ descrip- 

 tion of an apparatus and a modification 

 thereof with which it is possible to make 

 ten or more distillations at one time. 

 The condensers are so arrange<l that 

 each one Is entirely .separate and may be 

 remove<l without disturbing the oi^ra- 

 tion of the others. All gas and water 

 taps are also .separate. The modified ap- 

 paratus, which can be set up on a labo- 

 ratory table of the usual height and still 

 not be t<»o high to be used by a person of 

 .small stature. Is shown in figure 1, to- 

 gether with a horizontal offset burner 

 which may be used in connection with it. 

 Notes on the colorimetric determi- 

 nation of phosphorus in soil extracts, 

 C. K. Mii.r,.\R and F. A. G.vnot.ek {Jour. 

 Indus, and Engin. Chrni., 7 (1013), No. 7, p. 619). — From the results obtained 

 with the Veitch method (E. S. R., 14, p. 833), as perfected by Sclireiner and 

 Brown (E. S. R., 16, p. o33), "it would appear that if suflicient care is given 

 to the purity of reagents and to the measuring out of all reagents, determina- 

 tions of small amounts of phosphorus may be made In soil extracts with 

 considerable accuracy." 



The determination of sulphates in soils, P. E. Brown and E. H. Ket.looo 

 (Jour. Indus, and Engin. Chcm., 7 (1915), No. 8, pp. 686, 687).— The method 

 described in this article is also fully explained In Research Bulletin IS of the 

 Iowa Experiment Station, noted on page 19 of this issue. 



A method for the titrametric estimation of phytin. W. Heitiner and H. 

 Stadtj;r (Biochcm. Ztschr., 6.', (191^), No. 4-6, pp. 422-432) .—Phytic aci«l in 

 100 cc. of a solution of 0.6 per cent hydrochloric acid can be determined with 

 a 0.0.5 to 0.2 per cent ferric chlorid solution which al.so contains an equivalent 

 amount of 0.6 per cent hydrochloric acid, employing 0.03 ix>r cent annnonlum 

 sulphocyanld solution as an Indicator. Each milligram of iron Is equivalent to 

 1.19 mg. of phytin phosphorus. Titrations can be made In the presence of in- 

 organic phosphoric acid or phosphoric acid esters, since the.se are not precipi- 

 tated by iron in an acid solution, provided they are not In a great excess over 

 phytin. 



£2, 



Flo. 1. — Improved form of Kjeldahl appa- 

 ratus, with offset burner. 



