D'Albertis, Signor, 205.

Dale and Schorlemmer, 143.

Dall, W. H., 226, 228, 256, 278, 283, 320.

Dallinger, Rev. W. H., 237, 244.

and Drysdale, 300.

Dallman, Captain, 189.

Damoiseau's tables, 20.

Dana, Dr. Edward S., 151.
J. D., 169.

Dana's text-book, 152.

Darby, Prof. John, 416.
D'Arrest, 1.

D'Arrest's comet, 25.

Darwin, F., 249, 252, 327, 328, 345.
Daubrée, M., 160, 162, 163.
Davis, Captain J. E., 416.

Lieut.-Commander C. H., 28.
Rear-Admiral, 195, 416.

Dawson, G. M., 168.

J. W., 178, 305.

De Genouilly, Admiral, 73.

De la Cour, 62.

De la Grye, 96.

De la Provostaye, 109.

De Notaris, Giuseppe, 417.

De Romilly, 96, 97.

De Waha, 112.

Demography, 268.

Denison, of Colorado, 89.
Denmark, Bacteria of, 242.
Depths of the ocean, 190.
Des Cloizeaux, 153, 155, 160.
Desains, 109.

Descent, theory of, 310.
Deschanel's philosophy, 75.
Deshaies, Alfred, 417.
Detmer, 355.

Deville, H. Sainte-Claire, 92, 140.
Charles Sainte-Claire, 417.
Dictionnaire de Géographie, 191.
Digestion of foods, 377, 378.
Dimorphism, 280, 345.

Dipicrylamine, or aurantia, 143.
Dispersion of light, 113.
Dixon, E. M., 360.
Doberck, 7.

Dohrn, Dr. Anton, 285.

Döuhoff, 313.

Doolittle, Prof. C. L., 50.

Dorpat observations, 59.

Dorst, Dr., 188.

Dove, 74, 86.

Double stars, 6, 7.

Draper, Dr. Henry, 1, 11, 26, 46, 114.

Draper's (Dr. H.) observatory, Hastings-

on-Hudson, 46.

Dreyer, Dr., 2.

Drink from prickly pear, 342.

Drude, Dr. O., 326, 337.

Drummond, James, 417.
Dubiago, S.

Duboscq, 115.

Dudley, W. R., 337.

Observatory, Albany, 36.

Dujardin, 321.

Dulong and Petit, 109.

Du Moncel, 121.

Dumortier, Eugene, 328, 417.

Duncan, Prof. P. M., 300.

Dunér, of Lund, 7, 26.

Dunker, 176.

Dunn, Mr., 417.

Dupuy process, 395.

Dutton, Captain, 215.
Duvillier, 140.

Dyer, Prof., 343.

Hartlaub, Dr., 296.

Hartley, 104, 135.

Hofmeister, Prof. Wilhelm, 325, 326, 418.
Hohngren, 116.

Holden, Prof. Edward S., 1, 3.

Mass., 39.

spectra, 107.

1. Thermometry, 102.

2. Expansion, 103.

3. Change of state, 104.

4. Radiation, 107.

Heathcote, Commander J. A., 417.

Heer, 177.

Heeren, 148.

Heiden, 355.

Heinrich, 366.

Heis, Prof. Edward, 34, 418.
Helianthus tuberosus, 338.
Heller, 322.

Hellmann, Dr., 71, 78.
Helm, 283.

Helmholtz, 121, 124, 237, 238,
Hematin, pure, 146.
Henneberg, Prof., 374.
Henneguy, 250.
Hennessey, 83.
Henry, M. M., 10.

Henry Mountains, Utah, 53.
Henshaw, H. W., 218, 276.
Hepaticæ, 328.

Herand and Bouillet, 187.

Herbarium at Kew, 333.

Hermann, 139, 142.

Herschel, Sir John, 2.

William, 19.

Hertwig, Prof., 247, 301.
Hesehus, 106.

Hesse, 104.

Hessian fly, 309.

Heterogone flowers, 345.
Heterostyled, 345.

Heuglin, Theodor von, 418.
Heumann, 137.

Hicks and Harkness, 168.
Higgin, Thomas, 302.
Higgs, 94.

Highway across Peru, 194.
Hildebrandsson, 72.
Hildebrandt, 345.

Holle, 327.

Holub, Dr. E., 203.

Holz machine, 131.

Holzhauer, Capt.-Lieutenant, 188.
Homogone flowers, 345.

Hooker, Sir Joseph D., 211, 336.
Hoorweg, 69.

Hopkins Observatory, Mass., 51.
Hopkinson, Dr., 30, 130.

Hoppe-Seyler, 285.

Horn, G. H., 318.