APPENDIX A LXIX 
The Department of Experimental Evolution, situated on Long 
Island, has been occupied with theories of heredity, the effects of 
selection, influence of conditions on the germ-phasm, etc. 
The Department of Botanical Research, situated at Desert 
Laboratory, Tucson, Arizona, has been specially engaged in botanical 
research in desert areas, phyto-chemistry, environic reactions of plants, 
distribution of desert plants, principles underlying plant successions, 
reclamation of desert areas, etc. 
The Department of Embryology, located at the Johns Hopkins 
Medical School, Baltimore, has established a remarkable embryo- 
logical collection, and is studying human embryology. 
‘The Department of Marine Biology, with its principal laboratory 
at Tortugas, Florida, is pursuing studies on problems of the tropical 
ocean, ,paying special attention to those of physiology, cecology, 
variation, and generally the biology of the West Indian region. Many 
discoveries in biology and geology have been made. 
The Nutrition Laboratory at Boston has been occupied with 
various problems relating to the important subject of nutrition 
studies in metabolism, influence on metabolism of various factors 
as muscular activity, fasting, obesity, therapeutic agents, moderate 
doses of alcohol, nutritive value of different servings of food. 
The Department of Terrestrial Magnetism, with address at 
Washington, is occupied with a plan for a general magnetic survey 
of the earth. The famous non-magnetic ship Carnegie was constructed 
for this Department. It is also occupied with researches in atmos- 
pheric electricity. 
The Geophysical Laboratory at Washington is determining 
the modes of formation and the physical properties of the rocks of the 
earth’s crust. It is provided with apparatus for the study of ma- 
terials subject to such high temperatures and high pressures as obtain 
in the formation of rocks and minerals in the earth’s crust. . 
The Department of Meridian Astrometry has a southern obser- 
vatory in Argentina engaged in securing accurate measures of the 
positions of stars visible in the southern hemisphere to be compared 
with corresponding measurements made at observatories in the north- 
ern hemisphere. 
The Mount Wilson Solar Observatory at Pasadena, California, 
is engaged on studies on the sun and on the general problem of stellar 
evolution. It has associated with it a physical laboratory. 
The Department of Economics and Sociology is occupied with 
economic problems relating to population, immigration, agriculture, 
forestry, mining, manufacturing, transportation, money, banking, 
labor movement, etc. 
