NATURAL HISTORY AND PHYSIOGRAPHY OF NEW BRUNSWICK. 



237 



buds in spring, forcing the plants t» branch profusely, as a hedge does 

 when clipped. This is confirmed by the broken appearance of the tips 

 of the branches. The sheep browse as high as they can reach, but finally 

 the main terminal bud gets beyond them and thenceforth develops 



Fig. 3. Browsing effect upon spruces. 



normally. Three stages in the development of the upper cone are 

 shown in the three accompanying figures which are traced from photo- 

 graphs, and therefore are accurate. No doubt this effect is common 

 enough, though I have seen it in but two or three other places, and 

 never so perfectly as here. 



28. — An Optical Illusion on the Peat Bogs of Charlotte County. 



(Read June fi, 1899) 



In a paper on " Raised Peat-bogs in New Brunswick," published 

 two years ago (Trans. Royal Society Canada, new series, III, sec. iv r 

 150) I pointed out what seemed to be a rising and sinking of the surface 

 of the Lepreau bog to an extent of several inches, under the influence of 

 weather conditions which I could not determine. The only rule about 

 the movement seemed to be this, that it rose in bright and fell in dark 



