1006 E\n:iaxMENT staiion rkcokd. 



The nature and properties of corn oil, II. 'V. Vulte and Harriet 



W. (ill'.soN {,/<>"/: Anar. Chnn. Snr., .!.: ( I'.ll) 1)^ Xo. 1, pp. 1-H). 'Y\\^ 

 iiivo.sti»''alioii reported eiideuNors to ideiitil'v the series of fiitty acids 

 contained in maize oil. Tliis oil is made up of a eoni])lex mixture of 

 o-lycerids of tiie fatty acids, a small jx'rcentaj^-e of xolatiie oil, and a 

 larger pi'rcenta<;v of iinsaponilial)le matter. Attention is ealU'd to the 

 ahnost insurmountable ditticulties. owine- to the hu-k of a detiiute sclieme 

 of analysis, in ohtaininj^- accurate knowh'dge of the properties of tiie 

 fatty acids. 



The methods employed in the present investio-ation arc o-ivcn, and in 

 the case of previously known constituents, the results are com])ared 

 with those of other investig'ators. 



In studyino- the soluble fatty acids, a ])ortion of the acjueous liquid 

 was heated with alcohol and concentrated sulphuric acid. The charac- 

 teristic odor of ethyl acetate was produced, indicatint«- the presence of 

 acetic acid. By the silver nitrate test the presence of formic acid as 

 determined by Kokitiansky. was confirmed. Further research is needed 

 to prove the presence or absence of caproie, caprylic, capi'ic, and 

 ricinoleic acids in corn oil. The authors conckule that the present 

 investiyation adds to the known constituents of the oil, acetic, hypo«-aeic, 

 and ai'achidic acids. 



A method for determining sesame oil in vegetable and animal 

 oils, Tamiu)N {'/our. Plidi'm. rt ('liliii.,lj. .sw. , lo {lUOl), pp. o7\ '>S; 

 riLs. Cliein. CeiiM.. 1001, /, No. 7, p. .^^;.^).— To 15 cc. of the oil thei-e 

 is added T to 8 cc. of a reagent composed of 3 to •!• gm. of chemically 

 pure crystallized dextrose in loo cc. of hydrochloi-ic acid. The nnx- 

 ture is shaken '1 or 8 minutes, heated to Ijoiling, again shaken, and the 

 color noted. In the a})sence of sesame oil. the mixture remains col- 

 orless. In the ])res(>nce of 1 to 5 per cent of sesame oil. a ])eautiful 

 rose-red color is pi'oduced, with violet streaks turning to a chen-y rtnl. 

 Ten ])er cent of sesame oil gives a red color. The same reaction is 

 obtained with the fatty acids of the sesame oil. 



Rock analysis, W. F. Hillkbraxd (IUiI. I . ,s. (in,!. Siirrn/, No. 17f!, )>}>. 114 + 

 XIII, fuj>^. iJ).— This i>^ ;i revised e<liti(iii of the lii>t juirt of i'.ulletiii US of the Sur- 

 vey, giving (lescri])tionH of methods mid aiiparatus used in the laboratory of tiie 

 Survey for tlie eoiui)lete mineral analysis of rocks, minerals, etc. 



Recent work in soil analysis, II. (i. Srti)KKi!.\r.M (l\<jl. LoixUhv. Abui. Jlniidl. 

 Tidxkr., S!> [lUOO), A'o 4, jip. 267-:.'74)- 



On the citrate-solubility of the phosphoric acid of bone meal, T. ^Iethneh 

 [Ztsrhr. Angeiu. Chcm., /!)()/, Xn.t;, j>. /.>'.; ).—Tlieaverage solubility of the plios))horic- 

 aci<l of 6 samples of bone meal ( •_'] gm. of the l)one is .'lOO ce. of 2 per cent citric acid) 

 was 95.75 per cent. 



The valuation of gas liquor, F. .1. K. Cauii.la (Jmir. Sue. Chnii. Iml., ..'0 il'JOl), 

 Xo. 7, pp. ;?.:?-i^5).— A discussion of the use of the hydrometer in determining the 

 ammonia content of this sub.stance. 



The ash constituents of some Lakeland leaves, P. Q. Keegan {Xaturc, 63 

 (1901), Xo. 16o4, i>. ,?.%■)•— T''*' perceiita'jeof ash and the contents of silicaand lime in 

 theash of the leaves of sycamoie, wych ilm, rowan, common and cojipt-r beech, birch, 



