UK \i> OF soil 



only a year ago were any results of a satisfactory Polytechnic Institi/ r, N. Y., presided over 



obtained." The paper ended th n n-f.-r- this MH-H.-H. H^ mbjeet was on Expert Testi- 

 to isothermals and smral k. 



. 

 coMnl before the * 



iuul Twit of a 1.S50 Wntt Trun-f. 



The Magnetic Survey 

 of Mart In 



At by Gases at 

 ores " mid - The Measurements of Small Oaaeoos 



... . u i:.;. aj 



I- .',.> i: ' v - M-:!--d 



. x ; -.,|| iol Liquids," b> 



M, the Coefficient of IXpan- 



ii GaM*." by Edward W. Money and 



,,f H.-at mi tin 



:nit nii.l Utimate Strength of Copper \\ 

 ink I'. Whitman ami M: 



niid their I'M- by tin- Weather Bureau in Explora- 

 tions of the Upper Air," by chai rvin: 

 outs upon the Acetylene-Oxygen Standard 

 Cla>ton 11. Shan.: "Arc SJN 



thur I.. Foi.-y: -nil tin- Brightness of 



- irfaccs under Various Sources of Illu- 



1'. Whiiinaii ; "Note on the 



Construction of a S-nsitivc Kadiomet.r." by F.rnc-t 



: " Photographs Of Manometric Fla 1 

 ;ard L. Nichols and Ernest Merrill ; " The 

 Discharge of Bfeotrifled Holies l.y X-Rays," by 

 '. c'hilil; "A Final Determination of the 

 Kelat Lha of the Imperial Vanl of Great 



r of the Archives." by William 

 :i Electrical Thermostat." by Willis 

 An Apparatus for Testing the Law 

 n of Energy in the Human 1'. 

 toWUbu :' Ed ward I',. Kosa; '"fiie 



BtotricCooductirityof Certain Specimens of Sheet 

 Ota*, with Reference to their Fitness for Use in 

 '.yton C. Miller; "Graph- 

 ical Treatment 'f Altcrmiting Currents in liranch 

 Circuits in Casv of Variable Frequency," by Henry 



iy: "<M Simple Nonalternatini; Currents, 



by Alexander Macfarlane; N Exhibition oi In-tni- 



mining the Preouency of an Alter- 



nalink'<'urn-nt." by George S. Holer and Frederick 



Bedell: "The Predetermi nation (.f Transformer 



Regulation." l.y Frederick Hedell. Richard F. Chan- 



::. H. Sherwood, Jr.; "The FiTect of Pres- 



snre on the Wave Lengths of the Lines of the 



1 -;.-.':.. Eicon i.:-." l-y W..I. lluin- 



rm of Coal Calorimeter," l.y 



Charles L. tes on the Recent 11 



-. in the r nited States." l.y Charles 

 -. A N- \v F'.rm i.f Harmonic Ana! 

 mk A. Law*: "The Determination .f the Sur- 

 netTsnsloD of Water and of Certain Aqueous S 



V f the Methorl ol Hippie*," l.y N. 



Ernest Dorsey; M The Series of International Cloud 

 Observations made by th . , Weather 



Bureau and their Relation to Meteorological I'r-.i- 

 lema, vt bT Prank II. I'M-, low; **Th 

 ion anci Quality "f 



Length produced in Iron Wires oy Magnet i /at in." 

 ron H. Hnw-k. rical Resonance and 



Dielectric Hysteresiv ,rd B. Rosa and Ar- 



thur W. Smith; " A Method of the iMermination 

 .f the Psrfodol Kloctrieal OsdDations and Other 

 Am.lications of the Mime." by Marpint K. Molt by: 

 *' Tne Influence of Time and Temperature upon the 

 Absolute Rigidity of (^u :.- i 1 j. 



Bani 

 Horiiontal Candle Power." by C'. P. Matthews. 



,*/ry. Prof. Will nun P. Mason, who oc- 

 cupies the chair of Chemistry in the Rensselaer 



in..n\. This addros not on. i|,,. ,-ntire 



,| from the .lanilpoint of pra. ' lenoe. 



, the iiuest ii>n hoth through ihe . -\ 



the lawyer '. hut \va-~ ,p ;l , t 



s\llal.us. pointing out the province nf tin- e\p,n. 



i! lie Illicit IM- Milij.-ct t... and 



suggest mi: the '.hiti(.n f..r numerous dilliculi ie*. 



i-iiiii- tin- duti' 



a fatal error to know too much, and a pit into 

 which the expert may fall i> pi .r him l.y 



ijui-ti"iis lea.imu' him to yenture an opinion upon 



matters outside of his sj.ecial r an- 



swers, well within n "path leadiu- to t he 



point in (piesijoii is the ..! i \\| M n 1 1,,. 



line of inquiry crosses into regions \\ in -re i he \\ 

 feels himself unsafe his prop. 



I'lifortunately. th- M in- 



\ited to take thes,. collateral flights |.\ 1 1,. 

 empl..yinu' him. as well as by (tion. An 



. cases, is sui. i<> I:,, 



thorities quoted against him. so it hehoo\c> him to 

 be familiar with the literature of t he sui,j ( .,.t % M> as to 



be able to point <>ut that sooh and such a wi 



not up to date. <r that, if the entire pas-;. 

 quoted in full, it would not carry the ftd 

 siruetion that its partial i.resriitati In 



conclusion, he said : " Th- i nesx should le 



absoTntely truthful ; of oonrse that i> assumed. I. ut 



1 that he should be clear and terse in his 



statements, homely and apt in his illustrations, in- 

 capable of In-ill^' led beyond the field in which he 

 is truly an expert, and' as f. imale 



i-ii"! il (.(' illegitimate knowl- 



edge. Mount in:: t he witness stand with these prin- 

 ciples as his :;uidc. he may be as-ured o| stepping 

 down again with credit to himself and to th. 



fes-i,,n In- represent-." 



This section met in conjunction with the Amer- 



< hemical Society, many of whose nn i 

 were also members of' the chemical section of the 

 American Association. The papers presented to 

 either or^atii/ation were grouped under 

 heads and were presented before subsections as fl- 

 .nic chemistry. presi<led o\,-r by Albert 

 I'.. I'r.-scott: inorganic cln-mi>t ry. |iresid-d" ovi-r by 



William A analytical obemistrj, presided 



over by Louis M. I)ciinis ; agricultural chemi-t i-y. 

 :.'d ovi-r by Ilar\ey \\'. \\'ilev : industrial chem- 

 istry, presided oyerby William noMurtrie; |h\ 

 che'mistry. pn-ided over by Arthur A. Nbyes; and 

 physiological chemistry, presided oyei by I! 



W. Wiley. 



The f/.llowin^-named paper- i and di- 



r-lissed before the sect ion ; " Alkyl Misinut h lodid.'s " 



and " Kola Tannin," by Albert " I'.. PteSOOtt : u The 

 Chemistry "f Methylene." bv .b.hn t*. N.-f: " < n 

 the Action of Sodium on Met hylpn-pylkeioM and 

 on Acetotihenoii " and " <>n the Const it uti 

 some Ijy.'i- by Paul C. Fre.r; "Tl, 



coiiiposit'ion of Ib-ptane aii.l < ' ili-hTem- 



bv Arthur W. I'.urwel! : - I h-rivatiyea 



!- 



t.-rmination of the Volatility of Phosphorus I'm- 

 . ar-1 W. .Mori. -, : M l,'.-.-.-ni Progress 

 in Analytical Chemistry" and "A New F,nn of 

 Discharger for Spark Spectra of Solution-. 

 Louis M. Mennis: "(Qualitative Analysis: A Point 

 in Teaching that was not a Full Success," bv Ar- 

 thur I ' "1-T Stamlard for I 



..rid "Contributions from the. 

 Lalwratory of Water Ana!\ :-. .Mas;,,-hnsett. In- 

 stitnte of Technology,* 1 by Kll.-n II. Ifidianls; "A 

 Comparison "f Methods for determining Carbon 

 Dioxide and Carbon Monoxide." by Louis. M. Dennis 

 and C. G. Edgar ; " A Preliminary Thermo-Chem- 



