JTJLT 7, 1911] 



SCIENCE 



29 



Notes in Segard to Efficiencies of Luminous 



Flames: G. W. Stewart. 



An investigation of the efficiency of luminous 

 flames would be of interest. Eesults obtained 

 incidentally were studied, showing that a cylin- 

 drical acetylene flame is not so efficient as a 

 flat acetylene flame when judged by the propor- 

 tion of its radiant energy that is visible. The 

 amount of visible radiant energy that a given 

 quantity is able to furnish should also be consid- 

 ered. Experiments with a flat kerosene flame 

 show a height of flame at which the candle-power- 

 hours-per-gram is a maximum. The problem of 

 obtaining the most efficient flame, in the broadest 

 sense, is complex. It is advisable to get the tem- 

 perature of the incandescent particles as high as 

 possible, and also to get as many of them per 

 gram of the illuminant as possible. Both of these 

 factors depend upon the shape of the flame. 



On the Rate of Becovery of the Elastic Properties 



of a Certain Wire: L. P. Sieg. 

 The Measurement of Musical Capacity: C. E. 



Seashore. 



The speaker outlined a series of measurements 

 and statistics for a quantitative determination of 

 musical capacity. The principal measurements 

 are on pitch discrimination, perception of conso- 

 nance ana dissonance, tonal memory, tonal im- 

 agery, discrimination for intensity of sound, the 

 appreciation of rhythm, rhythmic action and vol- 

 untary control of pitch of voice. These exact 

 measurements were supplemented by returns to an 

 elaborate questionnaire on musical education and 

 appreciation and a personal interview after the 

 statistics had been collected. 



Illuminating Engineering — A New Profession: 

 Arthur H. Ford. 



Some Bemarks on the Solubility of Certain Salts 

 in Water: LeEot D. Weld. 



Notes on the Pollination and Variation of Bed 

 Clover (Trifolium pratense) : L. H. Pammel 

 and Charlotte M. King. 



Giving notes on the more important insects that 

 pollinate the red clover in the state of Iowa and 

 their relation to fertility; compares the amount of 

 seeds produced per head and the number of 

 flowers, showing an extreme variation. 



The Ecology of a Prairie Formation with Adja- 

 cent Swamp and Woodland in Story County, 

 Iowa: Ada Hayden. 

 Gives a physiographic account of the region 



with a physical analysis of the soil and the tem- 



perature records for an entire growing season and 



a list of plants foimd on each formation and the 



repopulation of tillable soil which is reverting to 



prairie. 



Some Notes on Iowa Fungi: T. H. Macbride. 



The Flowers of Myriophyllum spicatum: N. D. 



Knupp. 

 Glaciated Bock Surfaces near Linn and at Quarry : 



W. H. Norton. 

 Some Features of the Bering Biver Coal Field, 



Alaska: George F. Kat. 

 Problems on the Border Lines between Geology 

 and the other Sciences: George P. Kay. 

 In this paper attention is called to the need of 

 cooperative work among investigators in the dif- 

 ferent fields of science. Reference is made to 

 several bulletins and papers which have already 

 been published by the chemists of the United 

 States Geological Survey, by the physicists of the 

 geophysical laboratory, and by other scientists, 

 throwing light on many problems in geology which 

 heretofore were obscure. The necessity for fur- 

 ther work upon border problems, already under 

 investigation, and upon many other problems 

 which need solution, is emphasized. 

 Graphics of Ore Origin: Charles R. Keyes. 



In calling attention to some of the newest 

 aspects of ore genesis charts were prepared show- 

 ing (1) the old conceptions of the origin of ore 

 deposits, (2) the later ideas of secondary sulphide 

 enrichment and (3) the latest views concerning 

 the genesis of ore deposits generally. The last 

 mentioned is presented as a rational scheme for a 

 genetic classification of ore deposits. 

 Depositional Phases of Eolation under the Stim- 

 ulus of Aridity: Charles R. Keyes. 

 It is now a question whether wind-scour under 

 the stimulus of a typically arid climate is not 

 actually the most potent and persistent of all 

 erosive agencies. Under favorable conditions its 

 general efficiency must greatly exceed that of 

 stream-action in normally moist lands. At any 

 rate, erosionally, its world's work is probably sur- 

 passed neither by that of hydrasion nor by that of 

 glaciation. 



Volcanic Phenomena of Coon Butte Begion, Ari- 

 eona: Charles R. Keyes. 



Contrary to the recently expressed views re- 

 garding the origin of this remarkable crater, the 

 most critical evidences seem to indicate that this 

 feature of the local landscape is only one of the 

 many manifestations of the explosive type of vul- 

 eanism so prevalent throughout the region. 



