Mfl 



liquid by observing theNewton's rin^ 

 form between is 



tOTii ttr - : "|-'"r *"' 1 Kaisers experiments 



how that it does so by increasing the prowuro 



oo ij,,. .me air. forcing it out at the 



|t fl tf \Vjih the turn- that he investigated fu- 



don took place in 8-$ second- with n<> potential 



Iflbranca. in 1*4 second with ..m- Daniell cell. 



,0-4 second nh -'. With ..,..,-,- celK fu- 



4oa took place instantly and the Him- usually 



bant. MSS** \.-ad.-mv i 



... r thei all. ! Bn.wnian 

 mflfrffl^nt of small] in a liquid, eon- 



cladc* thut it i a capillary |.h.-j|,.ui. n-n. <J. 

 Oajneke (Wfademnnn'- " Annalen. " December. 

 Wf) calls attention ,, the fart that the forms 



Masuned by combinations of alkali.-- with oi.-ir 



rought in 1 ' Imvr 



a rrmarkable analogy with tin- configuration of 

 various small portions of thr st.-lhir universe, 

 such as por --, and Coma Be- 



Cnttrol Jfein/. Pictet (Berlin Physical So- 

 ..f thr ..pinion that -ub-ian.-rs 

 most Still IK- in tin- fluid state at the critical 

 i.iiint of heat that must be put 

 < substance, reckoning from absohr 

 b less than the latent heat of the liquid, and 

 solid bodies do not separate from solution at the 

 critical temperature, but do so on a furth- 

 of temiKTa' 

 Evaporation.- Lehfeldt r Philosophical I 



November) has deduced from thcrmody- 

 naraic considerations a formula rrpr.-s.-nt in- t be 

 relation between the composition of a mixed 

 li juid and that of the vapor that rises from it. 

 nnula agrees reasonably well with oxperi- 

 i hough new data seem to be needed. 

 CbrtMM/Mm.- Wilson (Cambridge Pl.ilo- 

 . - ,--.. M ,. i.: fadi thai in dost- 

 frae air there u still condensation into a cloud 

 of fine drops after th- u exceeds a cer- 



tain critical amount, which point remains con- 

 stant, no matter how many expansions are 

 made. The ratio of final (./initial volume at 

 this critical expansion i- l-2-V<. when the initial 

 temperature is 16'? ('., corresponding to a fall 



ure of 86. 



Solution. hinder and I' "hided sev- 



eral years ago that there is n<> definite line to be 

 drawn between aspen -ion and |>crfcct solution. 

 the difference being only one of degree of aggre- 

 catiofu They have now' r' Journal of th.- < 

 teal Society.'' February) strengthened their < on- 

 dsMion I. y finding tha- 



msjtuut oxide solution with hydrogen-sulphide 

 water is not only diffu-il.;. 

 through a porous pot Pour grades of such 



-- .. r *,lulions have thus bec-i, 

 rf which the first contains aggregates t hir 

 * ^ under the microscope, the second i- in- 

 fWWe but not d.ff. -Inrd difTu-il.le 



fcjt not filterable, and thr fourtti ,th diff.i-i- 

 JJrJl fll! 7^ tboogh it scatters and p.,i r - 

 **] ^1 de BoUUudr \ , a de- 



isMasms belong io a ierie. of which 



br. at one end may dilate on solution 



mS&FflX**? rn " r 



-BullHin de TAcatlemie Royale de Bel u 



No. 6) finds that the critical temperature of so- 



PHYSIC'S, PROGRESS OF, IN 1805. 



Itition is iinle|endent of the amount of either 

 body present. 1 ;m-h from mn 



ii.-r. but is cmiMaiit for the same Ixxiy, 

 and for a mixture is .-cnilly .'(jual t<> the ariih- 

 inetieal mean <-f th.. s ,. ,,f the c.,n-l itueiits. Tho 

 surface ten-i<>n of the lower of t\\o liijiiid- ' 

 at this temperature and the M 

 (ion men is< -iw becomes a plane, hence thr tnii- 

 |H-ratir e <1. t.-niinir.l l.y n 



:. Arctowski til'id.i. l>\ delerminin; 

 sulubility at very low temperatures of 

 organi compounds in carbon disulphide. li; 

 that the point of fusion of the s..|\. -nt a| 

 not to he an essential point on the cut 

 solubilities, as supp< ird. 



Cry*talli -/'-.,. I. [do Hoisbnudrnn(Parii 



ny of Science. April 'J'Ji -h"\\s th.-r 

 tals may form at the bottom of a solut; 



jH-cific gravity than theinsi 1 

 action depending on small variations oi 

 perature. Haudro\v-ki ( /eitsehrift fi'jrph\-i- 

 kali-chr Cliemie." Nov.-mbi-r. 1 

 inrd thr lii^lit that certain salt- emit during 

 cry-talli/atioii.an<l conclude- that it i- pr 

 electrical, being due to the union of elect rifl 

 ions. 



i.ascs. /, .. A hvgrometerbaf 



a new irincipie i- su^r-ted l.y I >r. .1. \' i 

 felt (" Bulletin of the Belgian Royal Acadi 



! ami K. The hygrometrie state of 

 atnio-plirre may be taken a- the ratio of tho 

 vapor tension inside a solution to the 1 

 pos-ihle vapor tension of water at the sam 

 sion. when tin- solution is neither 

 nor condensing water from the air. 'I i, 

 moistening a weighed piece of blotting . 

 with a weighed <|uantity of a solut io.>. 

 of known concentration". exposing to the air. and 

 weighing au'ain. the " e<|iiilibrium con' 

 tion." and hence the humidity, may IK- 

 lated. 



Socjrtv. I-'rb. 7) has attempted to -!iw that 

 Maxwell's theorem of the eijiial part it i 

 energy among the d freedom - 



ally lield. incoi, 



with the various internal movements in>i 

 by gaseous speet ra. This is ,lu,. t,, the c 

 exercised over the motion of the elect ron- 

 n.-i-hboring at.ms by the intervening ether, 

 that if, sav, 10* atoms are thus conn. . 

 motions of their miirht be ddii 



'8 co-ordinat.-s. aii'l "if thr atoms wen 

 there would be BxlO 1 degrees of fn-rdon 

 fial di-lim- the motion ol 



li-ctP : . if the total eneriry bi- C(| 



ilistributed among all the-r dr^r.'r- of ' 

 each atom will have only its share of th- 

 tro-iiiotion-. ;u,,i , ; ,1 motion 



will only be dimini-!. 

 to th< of the intrrnal motion 



ns." "ur c;,loriiiH'tric ineth. f] 

 sufllcirntly delic.-ii,- to d-trct this rlimiii 

 Liveing and !><-war (Paris Academy 

 July l.'n find that oUrrvat ion of th- 

 liqtiidnirand oxy^.-n do not bear out th- : 

 that the increase of intensity of the bai 

 the square of th<- density of oxygen i- d 

 the -ncounters of molecules "f ordinary 

 which are more frequent as tlu-ir free \ 

 diminishvd. Mixtures of liquid air and 



