204 Intelligence and Miscellaneous Articles. 
In that portion of the conglomerate which is adjacent to its 
confines, ' boulders ' of quartzite are apparently disrupted portions 
of quartzite-bands, since these are in alignment with the truncated 
portions of bands still existing, and are of similar composition. 
The authors are not at present in a position to account for the 
presence in the conglomerate of boulders of rocks foreign to the beds 
that border the conglomerate, or of such as possess markings 
comparable to glacial strise, by their theory of differential earth- 
movements ; but they consider that a boulder-bed subjected to 
lateral pressure would probably lend itself to the production of 
' false pebbles/ through the disruption of intercalated hard bands 
within itself or on its boundaries. 
XVI. Intelligence and. Miscellaneous Articles. 
A Theory of the Displacement of Spectral Lines 
PRODUCED BY PRESSURE. — A CORRECTION. 
IVf T attention has been drawn by Professor W. J. Humphreys to 
-L*-*- a slip on page 576 of my paper under the above title in volume 
14 of this Journal. Since the formula for %\ towards the bottom of 
the page is in electrostatic units, the datum e/mc= 1-8 x 10 7 should 
be replaced by e/m = l-8 x 10 7 . The value of £\/a is 8 x 10- 11 
per atmosphere as stated. 
0. W. ElCHARDSON. 
Princeton, N. J., 
Dec. 9, 1907. 
Lord Kelvin. 
With the beginning of a new volume we have to mourn the loss 
of Lord Kelvin. Ever since the year 1871, when Sir William 
Thomson's name first appeared as one of the Editors of the 
Philosophical Magazine, this journal has been very deeply indebted 
to him for his kindly interest and invaluable advice, as well as for 
many contributions of the highest value. 
Notwithstanding the incessant calls on his time and energy, 
arising from his numerous public duties as well as from his uninter- 
mittent scientific labours, he was never too busy to give his 
ungrudging help to the Magazine whenever it was sought. 
Our readers will doubtless join with us in an expression of 
profound admiration of Lord Kelvin's intellectual greatness and 
of affectionate regard for the simple kindliness of his nature. 
