ANNALS OF PERTHSHIRE SOCIETY OF NATURAL SCIENCE, xxvii 



ever, was the Flora of Perthshire^ on which Dr. Buchanan White was 

 engaged at intervals during the last twenty-five years of his life, and 

 which was issued after his death under the editorship of Professor 

 J. W. H. Trail. 



The Society's library, which has been added to year by year, now 

 contains 2579 volumes, representing 1130 works, all of which have a 

 bearing, more or less direct, on natural science subjects. The council, 

 in making their selections, have aimed at acquiring works which 

 were beyond the reach of working naturalists of moderate means, as 

 well as purchasing a certain number of more popular works for 

 beginners in the study of natural history. The Keference Depart- 

 ment now contains some really valuable scientific works, such as the 

 Challeiiger Reports, the British Museum Catalogues, Dresser's Birds of 

 Europe, Sow erhy's English Botany, Jeffrey's British Conchology^Yovrler's 

 British Coleoptera, Barrett's British Lepidoptera, the publications of the 

 Eay Society, the Cambridge Natural History, the publications of the 

 Geological Survey of the United States, etc., as well as the leading 

 scientific journals, and the Transactions of scientific societies. 



During each summer session a number of excursions are arranged 

 to different parts of the county, generally with some special object 

 of research in view, and under the guidance of a selected leader. 

 Over two hundred of these have been held, most of which have been 

 described in the Proceedings, with a record of the more interesting 

 finds. The ground covered has been very varied, embracing nearly 

 every region of Highland and Lowland Perthshire, at all elevations, 

 from sea-level to the tops of the highest hills. The following list 

 indicates the nature of the localities, several of which were visited 



on more than one occasion : — 



Cross-country excursions, . . .21 



River banks, . . . . .29 



Glens, ...... 27 



Lochs, ...... 23 



Hills (under 3000 feet), . . .11 



Mountains (over 3000 feet), . . . 11 



Quarries and geological sections, . . 17 



Archaeological and photographic excursions, . 1 7 

 Coast excursions, .... 7 



Special excursions, .... 5 



