4 
Spectroscopic Vacuum Tubes. — Starting Mercury Vapour. 
J. S. Anderson and G-. B. Burnside. 
Proc. Roy. Soc. Edin., vol. xxxiii., 1913, pp. 117-123. 
Vacuum Apparatus. — Starting Mercury Vapour. 
J. S. Anderson and G. B. Burnside. 
Proc. Roy. Soc. Edin., vol. xxxiii., 1913, pp. 117-123. 
Campbell, N. P. — On the Application of Manley’s Differential Densimeter 
to the Study of Sea- Waters on Board Ship. 
Proc. Roy. Soc. Edin., vol. xxxiii., 1913, pp. 124-136. 
Manley’s Differential Densimeter, On the Application of. 
3ST. P. Campbell. 
Proc. Roy. Soc. Edin., vol. xxxiii., 1913, pp. 124-136. 
Sea- Waters, Study of, on Board Ship. 
N. P. Campbell. 
Proc. Roy. Soc. Edin., vol. xxxiii., 1913, pp. 124-136. 
Densimeter, Manley’s, On the Application of. 
N. P. Campbell. 
Proc. Roy. Soc. Edin., vol. xxxiii., 1913, pp. 124-136. 
