CONTENTS. 



ABSORPTION (On tbe omission and) by metals of rays of lieat of 2;reHt, \vavelenü;Mis. fiOH. 

 AHSORPTIOXBAND (Observations on the magnetic rotation of tbe |)liine of ]iolarisation 

 in tbe interior of an). 41. 



— (Tlie calcuLition — from tbe mao-netic rotation of tbe plane »>f polarisation for 



substances witbout an) in tbe visible speotrnni. 418. 

 ACCUMULATION experiments witb denitrifying baeteria. 1 18. 

 ACETALDEIIYBE -\- paraUlelwde (Equilibria of pbases in tbe system :) wifli and wilboiit 



molecular transformation. 283. 

 ACID (On tbe prussic) in tbe opening buds of Prunus. 31. 



ACins (On tbe so-called comjiounds of sulplioncarboxylic) witb snli)buric esters. 482. 

 AilROBio micro-organisms (ïbe decomposition of cellulose by). 085. 

 A I, i{ E K D A VAN E K E N s Ï E I N (w.) aiul 0. A. LoBRY DE Hruyn : "Fomialdcliyde 



(metbylene)- derivatives of sugars and glucosides.'' 175. 

 ALLOYS (Tbe course of tbe meltingpoint-line of solid) or amalgams. (I). 42t. (II). 511. 

 AMALGAMS (Tbe course of tbe raeltingpoint-line of solid alloys or). (I). 424. (11). 511. 

 AMPinoxus L.vNCEOLATUS (Ou tbe structure of tbe ligbt-per^epting cells in tbe spinal 



cord, on tbe neurobbrillae in tbe ganglioncells and on tbe innervation of tbe 



striped muscles in). 350. 

 Anatomy. J. W. van VVijiie : "A new raetbod for demonstrating cartilaginous niikro- 



skeletons." 47. 

 ANGLES (On tbe connection of tbe planes of position of tbe) forinod by two spaces Sn 



passing tbrough a point and incident spacial systems. 53. 

 ANTIMONY (On tbe atomic weight of). 51-3. 



ARC (Tbe inlluence of variation of tbe constant current on tlie pitcb of tbe singing). 311. 

 A RON stein (L.) and A. S. van Nieuop. On tbe action of snlpbur on toluene 



and xylene. 288. 

 Astronomy. E. F. van ue Sande Bakhuyzrn: "On tbo yearly periodicity of tbe rates 



of tlie standavddock of tbe Observatory at Leydcn, Hobwii Xo. 17." (I). 68. 



(II). 193. 

 -- E, F. van be Sande Rakhuyzen: "Preliminary investigation of tbe rate of tlie 



standardclock of tbe Observatory at Leydon, Ilobwii N". 17 after it was nioiintcd 



in tbe nicbe of tbe great pier." 207. 



— J. Weedeh: "On interpolation based on a 3nppo.sed condition of iiiinimuni." 304. 

 atmospheric vuessuke (Measurements on tbe magnetic rotation of the plane of pola- 

 risation in liciuetied gases under). 243. 



48 



