CoLENSO. — Bity.li Notes. 477 



last coluinu on the assumption that the centrum is at a 

 depth of twenty to thirty miles. 



The result of the method of circles shows that we can- 

 not assume a velocity greater than about 15| miles per 

 minute; hence the time at the origin must have been 5.12 

 p.m. nearly. 



Velocity of propagation = l,S64:it. per second, nearly. 



Depth of Centrum. — No plausible estimate can be made as 

 to the deptli of the centrum, the distances being too great, or, 

 at least, too great for the degree of accuracy of the time- 

 observations. The origin was probably deep — say between 

 twenty and thirty miles. 



General Remarks. — I have not received or seen any notice 

 of any extraordinary sea-wave being observed. I do not 

 know that any previously-recorded earthquake can be referred 

 to the same origin, unless it be that of the 30th October, 1879 

 (though this is doubtful). 



The epicentrum has been assumed throughout to be a 

 point, which, of course, it is not. It might very well be an 

 area that would include B, C, E, and even D. But we have 

 no means of determining the e.^tent of the disturbed area. 



Art. LVII. — Busli Notes; or, SJiort Objective Jottings. 

 By William Colexso, F.E.S., F.L.S., &c. 



[/iCrtrf before the Havhc's Bay Philosophical Institute, 14th November, 



1890.] 



"Tis in ourselves that we arc thus aud thus. 



Sh^vblespeabe. 



1. On a Clear Pool of Water in the Thick Forest. 



It is a pretty and a i^leasing sight to come suddenly on a 

 deep pool of water in the dense still forest, especially on one 

 formed in an excavation having steep sides, made by the side 

 of the railway-line, with its pure smooth surface shining like a 

 mirror, and clearly aud faithfully reflecting the images of all 

 branches and leaves and flowers of trees and shrubs, and of 

 elegant drooping ferns overhanging its margins and growing 

 around it. Early in the day, with the sun shining m the 

 heavens, and its beams glinting down from the clear blue sky 

 through the open spaces among the tall tree-tops, such a pool 

 presents a ravishing spectacle, particularly when it possesses its 

 natural delicate fringes of light-green floating fresh-water Alrjce- 

 — Conferva and Oscillatoria — bespangled with glittering dew- 



