NATURAL SCIENCES OF PHILADELPHIA. 
467 
1888.] 
Gaudry, Albert. Les ancetres de nos animaux dans les temps geologiques. 12mo. 
Paris, 1888. I. V. Williamson Fund. 
Geikie, Archibald. The teaching of geography. 8vo. London, 1887. 
Text book of geology. 2nd Ed. 8vo. London 1885. 
I. V. Williamson Fund. 
Geinitz, II. B. Zur Dyas in Hessen. Kassel, 1886. 
Nachtrage zu Funden in den Phosphatlagern von Helmstedt. Biiddenstedt 
u. a. 18S3. 
Die Versteinemngen des lithographischen Schiefers im Dresdener Museum. 
1881. The Author. 
Genth, F. A. Lansfordit, ein neues Mineral. 8vo T. (1888). 
A letter to the Hon. the Board of Trustees of the University of Pennsylvania. 
June 25, 1888. The Author. 
Gerstaecker, A. Das Skelet des Doglings, Hyperoodon rostratus. 4to, Leipzig, 
1887. I. V. Williamson Fund. 
Gibson, John. Great waterfalls, cataracts and geysers, described and illustrated. 
8vo. London, 1887. I. V. Williamson Fund. 
Gilbert, G. K. Statistics of the Philosophical Society of Washington. 8vo T. 
The Author. 
Gilbert, J. H. Results of experiments at Rothamstead, on the growth of root- 
crops for many years in succession on the same land; being a lecture deliv¬ 
ered July 27, 1887, at the Royal Agricultural College, Cirencester. 8vo T. 
The Author. 
Godman, F. Ducane and Osbert Salvin. Biologia Centrali Americana. Zoology, 
Pt. 62-69. Botany, Pt. 24. I. V. Williamson Fund. 
Godwin-Austen, H. H. Land and freshwater mollusca of India. Plates and 
text. Pt. VI. I. V. Williamson Fund. 
Goodall, Geo. L. The wild flowers of America. With illustrations from original 
water color paintings by Isaac Sprague. 4to. Boston, n. d. 
I. V. Williamson Fund. 
Gosse, Phillip Henry. Actinologia Britannica. A history of the British sea- 
anemones and corals. 8vo. London, 1860. I. V. Williamson Fund. 
Gould, John. The Birds of New Guinea. Pts XX—XXIII. 
Supplement to the Trochilidae or Humming Birds. Pt. V. Wilson Fund. 
Grandidier, Alfred. Histoire phvsique, naturelle et politique de Madagascar. 
XVI, Atlas, 17e. Fasc., XVIII, T. 1, Texte, Ire. Partie, 15e. Fasc ; 
XXII, Atlas, 16e. Fasc. I. V. Williamson Fund. 
Gray, Asa. Memorial of the American Academy of Arts and Sciences, 1888. 
The Society. 
Portrait of. Editors of Torrey Botanical Bulletin. 
List of the Writings of. Mrs. Asa Gray. 
Green A. H. Geology. Part I., Physical geology. 8vo. London, 1882. 
' I. V. Williamson Fund. 
Greene, Edward L. Pittonia. I, 1-3. 8vo. 1887. The Author. 
Gruber, Wenzel. Beobachtungen aus der menschlichen und vergleichenden 
Anatomie, VIII. I. V. Williamson Fund. 
Giimbel, K. Wilhelm von. Geologie von Bayern. I Th.. 5 L; Title and 
Index. I. V. Williamson Fund. 
Gueme, Jules de. Campagnes scientifiques du Yacht Monegasque L’Hirondelle. 
Troisieme annee, 1887. Excursions zoologiques dans les lies de Fayal et 
de San Miguel ( Azores). 8vo. Paris, 1888. Prince Albert of Monaco. 
Guppy, H. B. The Solomon Islands, their geology, general features and suitability 
for colonization. 8vo. London, 1887. I. V. Williamson Fund. 
Harden, John H. and Edw. B. The construction of maps in relief. 8vo T. 
July, 1887. Edw. B. Harden. 
Harvey, F. L. The fresh water algae of Maine. 8vo T. The Author. 
Haughton, Rev. Samuel. Geometrical illustrations of Newland’s and Mendelejefif’s 
periodic law of the atomic weights of the chemical elements. April 28th 
and May 14th, 1888. 8vo T. The Author. 
