to Blair-Gaimrie and Perth. 287 



intersected by a vein of newer greenstone. Some miles lower 

 down the Tay, at Thistle Bridge, we noticed another linn or 

 fall of the river, caused by a vein of greenstone crossing the 

 river. The sandstone all around red, with beds of red marly 

 slate, which, like the sandstone, exhibits green streaks, and cir- 

 cular green and grey spots. This old red sandstone continues 

 onwards to Perth, being in its course variously intersected and 

 disturbed by veins of dolerite and other trap-rocks. 



In this line of walk, as in that from Aberdeen to the head of 

 the Dee, the zoologist and botanist will find much to interest 

 them : — the lover of insects will ramble in a country, the ento- 

 mology of which is nearly unknown — the botanist will not go 

 unrewarded : if he has merely a passion for rare plants, he will 

 be gratified ; if he aspires higher — if he is desirous of tracing 

 plants from the sea-coast to the summits of the most lofty land 

 in Britain (Cairngorm), and from thence down to the low land 

 leading to the Firth of Forth ; and if he endeavour to connect 

 their aspect and distribution, with rock, soil, exposure, climate, 

 and height above the sea, he will procure for himself the most 

 varied and multiplied enjoyment, and will be doing what has 

 not been done before, in this or in any other district in Scot- 

 land. In this tract the ornithologist and the ichthyologist will 

 not travel in vain ; and even the conchologist will, if he is dis- 

 posed to collect and determine the species of land, river, and 

 lake shells, return home with a store of facts of a very inter- 

 esting nature. 



Descriptive Memoir of the Imperial Forest of Bialowieza. By 

 the Babon de Brincken, Conservator in Chief. 



One of the most important and singular remnants of the pri- 

 meval forests of Lithuania is that of Bialowieza, formerly the 

 private domain of the kings of Poland, and now the imperial 

 property, in the district of Pruzany, in the government of Grod- 

 no. It comprises the immense forest which extends from the 

 River Bog to the heights, near the town of Osia, from north to 

 south, at the southern extremity of which is the hamlet of Hay- 

 ■nowezyna. The forest forms an uiiinterriiptcd mass, 31.5 miles 



