864 



SCIENCE 



[N. S. Vol. XLI. No. 1067 



served and a term like Alexandrian series be 

 established as a valid stratigrapbic title. 



Charles Keyes 



alabama aegillacea in minnesota 



The cotton-worm motb, Alabama argillacea 

 Hubn., appeared in Minnesota during the 

 past season at several different places. The 

 first recorded appearance was at Garden City, 

 Blue Earth County, September 21, where it 

 was proving injurious to a variety of ever- 

 bearing strawberries. The moths punctured 

 the fruit and apparently did considerable in- 

 jury. 



Between the tenth and the fifteenth of Oc- 

 tober, several other inquiries from other places 

 were received, complaining of this moth injur- 

 ing strawberries. One complaint came from 

 Eochester, Minn., one from St. Paul, and one 

 from Excelsior, which is on Lake Minnetonka, 

 west of Minneapolis. The moths apparently 

 stayed but a very short time in each of these 

 places. Between the fifteenth and nineteenth 

 of October the nurseryman at Garden City, 

 Minn., had further trouble from these moths. 

 He stated in a letter that they were most 

 abundant about the twentieth of September, 

 after which they disappeared, becoming rather 

 scarce, but appearing again in numbers about 

 the fifteenth of October. 



These few notes may be of interest to ento- 

 mologists, as they show the northern flight of 

 the moths; also that they will feed on fruit, 

 if fruit is available at that time. 



William Moore 



Division op Entomology, 

 University ov Minnesota 



chemihydrometry 

 The writer has been searching for a name 

 for the new method of measuring the flow of 

 rivers, the discharge of turbines and the ca- 

 pacities of reservoirs by means of chemicals 

 mixed with liquids. OJiemihydrometry seems 

 to convey the idea exactly, but it can be criti- 

 cized in at least two respects. It is a com- 

 pound whose component parts are derived 

 from two different languages, which is not 

 good form, and the second part is almost ex- 

 clusively used when it refers to the determi- 

 nation of density or specific gravity. 



An appropriate name for this new branch 



of engineering will soon be in demand and it 



is, therefore, suggested that other names be 



submitted by your readers for consideration. 



B. F. Groat 



EYE shades for microscopical work 

 To THE Editor of Science: The eye shade 

 described in Science for May 28 is identical 

 in plan though not quite as perfect in con- 

 struction as one sold for many years by deal- 

 ers in microscopic supplies. It was designed 

 by Dr. E. H. Ward and is illustrated in ear- 

 lier editions of Gage, " The Microscope " (e. 

 g., VI. ed., p. 59), and in various catalogues 

 of micro accessories as Ward's Eye Shade. 

 In the later editions of Professor Gage's book 

 it is replaced by another form which in the 

 author's judgment probably meets the needs 

 of the case more satisfactorily. 



The discussion which Professor Gage gives 

 in connection with the figure of the eye shade 

 regarding the care of the eyes is worthy the 

 more careful consideration of the laboratory 

 teacher. Such problems receive little, if any, 

 attention in the training of graduate stu- 

 dents, and college classes suffer when every 

 new generation of teachers comes to practise 

 on them. X 



SCIENTIFIC BOOKS 

 The Climatic Factor as illustrated in Arid 

 North America. By Ellsworth Hunting- 

 ton, with contributions by Charles Schuch- 

 ert, Andrew E. Douglass and Charles J. 

 Fullmer. Carnegie Institution of Wash- 

 ington, Publ. 192, 1914. 4to. Pp. 341, richly 

 illustrated. 



The senior author of " The Climatic Factor " 

 has for a number of years endeavored to throw 

 light upon the relations between changes in 

 climate and human activity, and the wealth of 

 fact which he personally has hitherto brought 

 to light and correlated with the investigations 

 of others, especially archeologists, in that re- 

 gion called the cradle of western civilization, 

 together with interpretation in terms of cli- 

 matic oscillation, have won for him much 

 recognition both from a wide circle of the 



