PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
SESSION 1870-71. 
CONTENTS. 
Monday , 5th December 1870. 
Opening Address. Session 1870-71. Ify David Milne 
Home, Escp, . . 
PAGE 
O v o 
/Li » * ^ 
Monday , 19£A December 1870. 
Additional Remarks on the Theory of Capillary Attraction. 
Dy Edward Sang, Esq., . . . 
Laboratory Notes: On Thermo-Electricity. I3y Professor 
Tait, ....... 
Note on Linear Differential Equations in Quaternions. By 
Professor Tait, . . . . . 
On some Quaternion Integrals. By Professor Tait, 
Note on an Ice Calorimeter. By Dr A, Crum Brown, 
Monday , 16th January 1871. 
Address u On the Educational System of Prussia.” By 
Principal Sir Alex. G-rant, Bart., 
On the Physiology of Wings: being an Analysis of the 
Movements by which Plight is produced in the Insect, 
Bat, and Bird. By James Bell Pettigrew, M.D., 
P.R.S. Communicated by Professor Turner, 
308 
308 
311 
318 
321 
309 
336 
Monday , 50th January 1871. 
Address on “ The Results of the More Recent Excavations 
on the Line of the Roman Wall in the North of Eng¬ 
land.” By Dr J. Coi-lingwood Bruce, . . 330 
