AXJGTJST 19, 1910] 



SCIENCE 



255 



tions. The work was started in 1901 and subse- 

 quently carried out for one year by Mr. H. S. 

 Fawcett. It was found that in many cases seed 

 did not germinate readily in the fall, but after a 

 period of stratification and freezing germination 

 proceeded more readily. One of the remarkable 

 features in this study was the great irregularity 

 with reference to the germination of seeds. The 

 paper cites some of the important literature on 

 the subject with reference to delayed germination. 

 The Problem, of Weeds in the West: L. H.-P.'s.M- 



MEL. 



A brief -account of weedy plants observed in 

 Manitoba, Saskatchewan, Alberta, British Colum- 

 bia, Washington, Oregon and the region between 

 the Rockies and the Missouri River compared with 

 the weeds of Iowa. 

 Spore Formation in Lycogala exiguum : Hexey S. 



CONAED. 



Snores ate formed in the man:-:er described by 

 Harper for Fuligo, except that in Lycogala the 

 spores at the periphery of the aethalium are latest 

 to mature. 

 Some Geological Aspects of Artificial Drainage: 



6. G. Wheat. 

 The Pleistocene Record of the Simpson College 



Well: John L. Tilton. 



This paper is a record of material' found as an 

 eighteen-inch well was bored one hundred and 

 twelve feet through the Pleistocene deposits at 

 Simpson College. It was accompanied by an 

 oral description of variations found in other parts 

 of Warren County. 

 The Aftonian Age of the Aftonian Mammalian 



Fauna: Samuel Calvin. 

 Some Standardizing Tests of Stern's Tone Vari- 



ator: R. H. Sylvester. 

 Discrimination Sensibility for Pitch within the 



Tonal Range: H. G. Schaefer. 



The technique of past measurements on pitch 

 discrimination within the tonal range has been 

 overhauled within the la.st few years, and sources 

 of error have been discovered. It has been the 

 object of the present experiment to work under 

 more perfect conditions and on a larger number 

 of individuals, and from the results to obtain a 

 more reliable cur\'e. 



The Technique of Pitch Discrimination Measure- 

 ments: C. E. Seashore. 



During the last few years, the technique of these 

 measurements has been subjected to experimental 

 criticism which has resulted in the rejection of 



numerous experiments, methods and results for- 

 merly credited. It has also resulted in aggressive, 

 constructive work reducing the physical, physio- 

 logical and psychological factors in the problem to 

 a fair degree of control, which enables us to make 

 our measurements reliable and to get a keener 

 insight into the nature of the problem than has 

 heretofore been obtained. 

 Some Recent Discoveries concerning Behavior of 



Platinum-iridium Wires : Lee P. Sieg. 

 Concerning a Study of Kerosene Oils by Physical 



Methods: G. W. Stewart. 

 Historical Sketch of Early Health Regulations in 

 Iowa: L. S. Ross. 



Brief account of causes leading to establishment 

 of rules and regulations. Early ordinances; dis- 

 eases most feared. Danger from cholera in river 

 towns. 



Contributions to the Herpctology of Northwestern 

 Iowa: Alexander G. Ruthven. 

 Partial results of an expedition sent by the 

 Museum of the University of Jlichigan to north- 

 western Iowa for the purpose of obtaining repre- 

 sentatives of the fauna of the region. An analysis 

 of this material shows that this fauna is composed 

 of three elements, a wide-ranging one; an eastern 

 one associated with the lowland habitats, and a 

 western one associated with the upland habitats. 

 An Annotated Catalogue of the Recent Mammals 



of loiva: T. Van Hyning. 

 The Persistence of Certain Mollusks: B. Shimek. 

 A discussion of certain mollusks which appear 

 in the Aftonian and have come down to us through 

 the several succeeding interglacial periods to the 

 present time. 



The Development of the Posterior Lymph Hearts 

 of the Loggerhead Turtle (Thalassochelys car- 

 et t a) : Frank A. Steomsten. 

 The Development of the Sympathetic Nervous 

 System in Birds: Albert Kuntz. 

 This paper is an attempt to further exact 

 knowledge concerning the histogenesis of the sym- 

 pathetic nervous system, to extend the author's 

 observations on the histogenesis of the sympa- 

 thetic system in mammals, and to point out cer- 

 tain morphogenetic differences which occur in the 

 development of the sympathetic system in birds 

 and mammals, with a view to their phylogenetie 

 significance. 



During the business meeting the following reso- 

 lutions were adopted: 



" Recognizing the primal importance of the pub- 



