256 Intelligence and Miscellaneous Articles. 



necessary in all cases to depend only upon the average difference 

 of position obtained by comparing all the observations at one 

 period of the different years, with all at the other period. He finds 

 that there are then only five stare in the list, viz. 32 Eridani, 41 

 Aurigoe, c Geniinorum, an anonymous star in Cancer.and Herschel 95) 

 which show diftereuces in the proper direction, and so much greater 

 than the probable errors as to deserve much attention, as exhibiting 

 parallaxes measurable by this method, and, of these, h Geminorum 

 is subject to great doubt, from the smallness of the number of the 

 observations at the late period of the year. 



The results however are entitled to rather more consideration in 

 this respect, that, with regard to the greater numbers of the stars 

 that are physically unexceptionable (that is, omitting binary stars, 

 and those whose components are of equal magnitude), the directions 

 of apparent change of position are favourable to the supposition of a 

 measurable parallax. This is particularly the case with respect to 

 32 Eridani and Herschel 95, which the author in conclusion recom- 

 mends to the notice of astronomers provided with adequate instru- 

 ments for observing them. 



XXXV. Intelligence and Miscellaneous Articles. 



POSTSCRIPT TO A PAPER " ON STRIATED ROCKS IN THE LAKE 

 •' 'district OF WESTMORELAND." BY JAMES BRYCE, JUN., M.A., 



To the Editors of the Philosophical Magazine and Journal. 



Gentlemen, 

 T TAKE the earliest opportunity afforded by your Journal to correct 

 -*- an error in my paper on striated rocks, which appeared in the Num- 

 ber of the Philosophical Magazine for December last. It is stated in 

 the first paragraph, that " striated rocks have not been before noticed 

 in the lake district." This is a mistalce. In drawing up the account 

 I overlooked a paper by Dr. Buckland, in which the existence of 

 scratched rocks in Westmoreland is mentioned. To this paper my 

 attention has been kmdly directed by Mr. John Hudson of Kendal. 

 It is contained in the Proceedings of the Geological Society of 

 London, vol. iii. part 2 ; and is given' under the dates November 

 18th and December 2nd, 1840. The following is the only passage 

 in which striae are referred to ; it occurs on pp. 347-8. 



"Dr. Buckland had no opportunity of seeking for polished and 

 striated surfaces in the high mountain valleys of the lake district ; 

 but he found them on a recently exposed surface of greywacke in Dr. 

 Arnold's garden at Fox Howe near Ambleside ; likewise near the 

 slate quarry at Rydal ; and on newly-bared rocks by the side of the 

 road ascending from Grasmere to the Pass of Wythburn ; he is also 

 of opinion that many of the round and mammillated rocks at the bot- 

 tom of the valley leading from Helvellyn, by the above localities, to 

 Windermere, owe their form to glacial action." 



