160 Prof. Royle’s Lecture on the Great Exhibition of 1851. 
munication as this; but I am truly anxious to convince any gen- 
tleman who may have doubts on the subject, that to keep, in 
ever so plain a way, a journal of such appearances as may occur 
at his station, will be a most acceptable contribution to an enquiry 
which will owe much of its interest and value to the scale on 
which it is pursued; and especially to induce those to whom I 
have not the advantage of being personally known, and those 
resident at the remaining posts in the northern, middle, and ex- 
treme western regions to swell the list. 
With respect to the influence of these displays npon the move- 
ments of the magnetical elements registered by photography at 
Toronto, I may say that I find the symbols which represent, in 
the abstract, ‘total absence of disturbance,’ ‘moderate disturb- 
ance,’ ‘considerable disturbance,’ and so on, against almost every 
variety of observation, and am not yet prepared to give any set- 
tled opinion on the subject. * * * me 
I shall look with much interest for the observations made in 
the past winter, which in Canada has been remarkable for the 
number of splendid displays of aurora—and the repeated occul- 
Art. XIX.—On the Arts and Manufactures of India ; froma 
ecture by Prof. Royie.* 
iy CEE RITE eee ae 
__* From the Lectures on the resulis f the Exhibiti see the Society 
pe aera Leetures on t sults of the Exhibition, delivered before eee 
Pr mee ntactures and Commerce, at the suggestion of H. R. H. ee _ 
