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thread was not always made, (2) the hour of observation not 
being always the same, the results are affected by the diurnal 
variation, and (3) the results must also be affected by irregu- 
lar disturbances. 
MICEOSCOPICAL AND NATURAL HISTORY SECTION. 
December 4th, 1876. 
Charles Bailey, Esq., in the Chair. 
Notes on a Botanical Excurison in the Aberdeenshire 
Highlands in July, 1876,” by Mr. Thomas Eogers. 
The author started in company with Messrs. J. Nield 
and Ashton and John Whitehead, on Jul}^ 14th, and com- 
menced ascent of Ben Mac D’hui, from Aviemore the follow- 
ing day. On the wa^^ in brief words were noticed Trienta- 
lis Europea and the rare Musci, Orthotriclium speciomm and 
0. leiocarpum. Crossing the river Spey, they entered the 
woods of Rothiemurchus — in which was situated a swamp 
where v/as gathered Sphagnum laricinum. — a plant almost 
new to Britain. Up higher grew Carex pauciflora; 
and many of the little rills hereabouts were much infested 
with a beautiful algae (Batrachospermum rnoniiiforme). 
Still moving upwards for about two miles, Cornus suecica 
and Vaccinium uliginosum were found, and the rarest of the 
six British Lycopodia (L. annotinum). The path now 
began to get rugged and barren, Junus trifidus being the 
principal plant. Near the top of the watershed among 
moss covered stones were found Veronica alpina, the rare 
