246 



SCIENCE 



[N. S. VoL.XXXn. No. 816 



institution. Professor Cattell recently said 

 in an address at Harvard that " The first step 

 of a really great president would be to refuse 

 to accept a larger salary than is paid to the 

 professors.'" In the University of Pitts- 

 burgh, however, there is an increasing differ- 

 ence between the salaries for teaching and for 

 administration. 



There seems to be a diversity of opinion on 

 the matter of presidents' salaries. In Bulle- 

 tin jSTo. 2 of the Carnegie Foundation, May, 

 1908, it is stated that "the salaries [of presi- 

 dents] are not much above the upper range of 

 what a professor may receive " (p. 25). From 

 the figures just given it will be seen that this 

 statement holds approximately true for the 

 two state universities referred to, but is very 

 wide of the mark for the University of Pitts- 

 burgh. And there is every reason to believe 

 that many more small colleges and universi- 

 ties show a similar disproportion. In view of 

 these and other considerations, it seems to me 

 that the Carnegie Foundation should make a 

 complete and thorough investigation of the 

 matter, especially of those institutions now on 

 the accepted list. The foundation has already 

 done great service by publishing the average 

 and the maximum salaries for professors in 

 many institutions, but this has been as much 

 in the interests of institutions as of the facul- 

 ties. A very great service could be rendered 

 to the professors themselves by publishing also 

 the minimum professor's salary and the presi- 

 dent's salary. Inasmuch as the prime purpose 

 of the foundation is to advance the profession 

 of teaching, and not institutions as such, a 

 thorough investigation should be made, and 

 at the earliest possible moment. 



A. W. Crawford 

 Untvehsity of Manitoba, 

 June 30, 1910 



' ON THE ORIGIN OP FLINT-LIKE SLATE NEAR 

 CHAPEL HILL, N. C. 



To THE Editor of Science : In a recent bul- 

 letin of the North Carolina Geological and 



' " The Case of Harvard College," Popular Sci- 

 ence Monthly, p. 61.3, Vol. LXXVI., No. 6, June, 

 1910. 



Economic Survey Dr. F. B. Laney' has oc- 

 casion to refer to an article by me' on the 

 flint-like slate near Chapel Hill, and con- 

 cludes from the partial chemical analysis and 

 petrographic description there given that I 

 am unwarranted in ascribing to the rock a 

 sedimentary origin. In the quotations from 

 my article no reference is made to the field 

 data upon which the classification of the rock 

 as a sediment was based. 



The rock in question lies in distinct beds 

 in avsedimentary series which includes sand- 

 stones and conglomerates, and in places it 

 grades oil into a fine sandstone. It coincides 

 in dip with the other members of the series 

 and can be traced for miles along the strike, 

 and does not pinch out as would be the case 

 with a lava flow. At several localities along 

 Morgan's Creek, the one nearest Chapel Hill 

 being at King's Mill, two miles distant, the 

 slate lies unconformably upon sheared felsite 

 or rhyolite, the marked difference between the 

 two rocks being apparent at a glance. 



The partial chemical analysis of the rock 

 was given to show specifically its close re- 

 semblance to the local sheared felsites from 

 which it was supposedly derived by mechan- 

 ical wear. Dr. Laney does not seem to real- 

 ize that the material of a felsite or rhyolite, 

 broken down and reconsolidated, may show 

 the same essential characteristics as the orig- 

 inal rock. It is evident that he has not seen 

 the flint-like slate in place in this neighbor- 

 hood. 



H. N. Eaton 



Unin-ersity or North Cabolina 



■ ' THE oscillations OF SWINGING BODIES 



To THE Editor of Science: May I be al- 

 lowed to say that farther investigation shows 

 that the forms of two of the curves in a 



• North Carolina Geological and Economic Sur- 

 vey, Bull. 21, 1910, "The Gold Hill Mining Dis- 

 trict of North Carolina," by F. B. Laney, p. 18. 



• Elisha Mitchell Scientific Society, Journal, 

 Vol. 24, No. 1, April, 1908, '■ Micro-structure and 

 Probable Origin of Flint-like Slate near Chapel 

 Hill, North Carolina," by H. N. Eaton. 



