109 



Professor Frazer, from the Committee, consisting of himself, 

 Professor A. D. Baehe, and Mr. M'Euen, to whom was re- 

 ferred the second paper of Professor Loclve on Magnetical Ob- 

 servations, reported in favour of its publication, which was or- 

 dered accordingly. 



Professor Locke's paper contains a continuation of his observations 

 upon the magnetic dip and intensity, made at different points in the 

 United States during the year 1844, and includes thirty-five sets of 

 observations made at twenty-four different stations. He then gives a 

 series of thirteen observations made at three stations, viz : Fort Lee, 

 N. Y.j Snake Hill, and Patterson, N, J., intended to show the re- 

 markable changes which take place both in the dip and intensity, in 

 passing from rocks of the usual kind, to those belonging to the trap- 

 pean family; which changes, so far as they regard the magnetic in- 

 tensity, he announces in the following terms : — " The intensity, which 

 ordinarily has a value along a line of moderate length not varying 

 beyond certain moderate limits, becomes, at the base of a trappean 

 pinnacle, extraordinarily diminished, and at the top of the same still 

 more extraordinarily increased." These changes, as well as those 

 of the dip which follow the same law, are illustrated by diagrams, in 

 which the values of the dip and intensity are represented as the ordi- 

 nates of a curve, the distances between the stations being taken upon 

 the line of abscissas. Professor Locke believes these changes to be 

 due to the assumption of magnetic properties by the trappean rocks, 

 the axis of the magnet coinciding with the axis of figure of the hill, 

 which is generally vertical. 



Professor Locke strongly urges the propriety of multiplying obser- 

 vations upon these phenomena, in order to develop the general law ; 

 and concludes by returning his thanks to Col. Sabine and the British 

 Association for the kindness and liberality with which they have ten- 

 dered their assistance in his labours. 



Professor Frazer, on the part of Mr. Haldeman, presented a 

 communication, entitled " Observations on General Phonology 

 and Alphabetic Notation, with an Attempt to adapt the Roman 

 Alphabet to Exotic Languages, by S. S. Haldeman, A.M.," 

 which, on motion, was referred to a Committee, consisting of 

 Dr. Dunglison, Mr. Pickering, and Dr. Bethune. 



Mr. Kane, on the part of the Committee of Arrangements, 

 consisting of himself, Mr. Ord, and Dr. Patterson, made the 



VOL. IV. — p 



