OLON TT EN ITs Vi 
DALTON (J. P.). Researches on the JouLE-KELVIN-eflect, especially at low tempera- 
tures. I. Calculation for hydrogen. 863. IL. The JouLr-KeuviN-eflect for air at 
0° C. and at pressures up to 42 atmospheres. 574, 
DIATOMIC GASES (Isotherms of) and their binary mixtures. VIII. The breaking stress 
of glass and the use of glass tubes in measurements under high pressure at 
ordinary and low temperatures, 30. 
DIFFERENCE QUOTIENTS (About) and differential quotients, 59. 
DIFFERENTIAL EQUATIONS (A family of) of the first order, 756. 847. 
— (On a class of) of the first order and the first degree. 813. 
DIPSACAN and Dipsacotin, a new chromogen and a new colouring-matter of Dipsa- 
ceae. 509. 
DISINFECTION (Investigations on the subject of). 668. 
DOUBLE POINTS (On the law of molecular attraction for electrical). 132. 
DUBOIS (£UG.). On a long-period variation in the height of the ground-water in 
the dunes of Holland. 674. 
DUNES of Holland (On a long-period variation in the height of the ground-water in 
the). 674. 
DYNAMIC CONCEPTION (The) of a reversible chemical reaction. 162. 
EARTHCURRENT-REGISTRATION at Batavia. (3rd Communication), 242. 
EASTON (c.) On LockyeEr’s 35-year period in the solar-activity. 842. 
ELECTRO-MYOGRAM (About observations on the) and form-myogram under the influence 
of fatigue. 723. 
ELECTRICAL SYSTEMS (On the law of the partition of energy in). 580. 
ELECTROCARDIOGRAM (About the independence of the) with regard to the form-cardio- 
gram. 273. 
ELEMENTS (On triple systems, particularly those of thirteen). 290. 
EQUILIBRIA in quaternary systems. 138, . 
ERRATUM. 234, 444, 614. 
EYKMAN (C.). Investigations on the subject of disinfection. 668. 
EYKMAN (P. H.). New methods of stereoscopy. 832. 
FATIGUE (About observations on the electro-myogram and form-myogram under the 
influence of). 723. 
FLORA of Java (Contribution NO. 1 to the knowledge of the). 3rd Continuation 129. 
4th Continuation. 158. NO, IIT. 415. 
FLOWER (On the biological significance of the secretion of nectar in the). 445, 
FORM-CARDIOGRAM (About the independence of the electro-cardiogram with regard to 
the). 273. 
FORM-MYOGRAM (About observations on the electro-myogram and) under the influence 
of fatigue. 723. 
FREQUENCIES (On) of the mean daily cloudiness at Batavia. 366. 
FruIts (Rapid change in composition of some tropical) during their ripening. 74. 
GANGLION-CELLS (On the structure of the) in the central nervous system of Brauchio- 
stoma lane,”. 53. 
