34 REPORT ON NATIONAL MUSEUM, 1886. 



Lieutenant Winterhalter and Dr. Nash, of the CJ. S. Navy ; Mr. Thomas 

 Lee, of the U. S. Fish Commission, and Mr. H. L. Turner, of the Geo- 

 logical Survey. Mr. Dodge has already rendered valuable services in 

 photography to the Museum. Mr. Merrill has photographed for his 

 own department numerous stone quarries, mud cracks, drift bowlders, 

 etc. From Mr. Thomas Lee have been received several valuable nega- 

 tives which he made on the cruise of the Albatross. 



The Saturday Lectures, given under the joint auspices of the Anthro- 

 pological and Biological Societies of Washington, were delivered, as in 

 previous years, in the Lecture Hall. The programme of the course was 

 as follows: 



Saturday, March 6.— Mr. William Hallock : The Geysers of the Yellowstone. 

 Friday, March 12.— Prof. William Harkness: How the Solar System is Measured. 

 Saturday, March 30. — Prof. T. C. Mkndeniiall : The Nature of Sound. 

 Saturday, March 27. — Prof. F. W. Clarkf : The Chemistry of Coal. 

 Saturday, April 3.— Dr. C. 11 art Merriam : The Migration of Birds. 

 Saturday, April 10. — Dr. Washington Matthews, U. S. Army : The Gods of the 

 Navajos. 



Friday, April 10.— Dr. D. B. Simmons: Social Status of the Women of Japan. 

 Saturday, April 24.— Prof. W. K. Brooks: Life. 



Saturday, May 1. — Mr. Lester P. Ward: Heredity and Opportunity. 

 Saturday, May 8. — Dr. J. S. Billings, U. S. Army: Animal Heat. 



(/) Meetings op Societies. 



As in previous years, several societies have availed themselves of the 

 privilege of using the Lecture Hall for their meetings. These have 

 been the National Academy of (Sciences, the Biological Society of Wash- 

 ngton, Entomological Society of Washington, and the Meteorologists' 

 Convention. 



Since the papers read at the meetings of these societies have in many 

 instances related to the work of the Museum, and were illustrated by 

 Museum specimens, the titles are given below : 



NATIONAL ACADEMY OF SCIENCES. 



(Meetings April 20, 21, 22, 1886.) 



G. K. Gilbert. — The Geologic Age of the Equus Fauna." 



T. Sterry Hunt. — The Cowles Electrical Furnace.* 



E. D. Cope.— On the Phylogeny of the Batrachia.* 



E. D. Cope. — On the Phylogeny of the Placental Mammalia.* 



H. A. Newton. — The Comet of Biela.* 



Elias Loomis.— Areas of High Barometric Pressure over Europe and Asia.t 



S. H. Sccdder.— The Cockroach in the past and in the present. t 



Alfred M. Mayer.— On the diathermancy of Ebonite and Obsidian, and on the 



production of Calorescence by means of screens of Ebonite and Obsidian.t 

 Alfred M. Mayer.— On the Coefficient of Expansion of Ebonite. t 

 Alfred M. Mayer.— On the determination of the Cubical Expansion of a solid by 



a method which does not require calibration of vessels, weighings, or linear measure.t 

 Alfred M. Mayer,— On Measures of absolute Radiation. t 

 E. D. Cope.— On the Geology of the region near Zacualtipan, Hidalgo, Mexico. t 



Read April 20. t Read April 21. $ Read April 22. 



