riSHEEY BOARD FOR SCOTLAND. 91 



and is from its conformation and the position of the observing 

 stations singularly well adapted for obtaining data to bring the 

 phenomena of atmospheric meteorology and marine physics into 

 relationship with those of marine life, these observations will furnish 

 very valuable results. 



In 1883 special physical work was carried on by Dr. Gibson during 

 a cruise of the " Jackal " in the Moray Firth. The methods and 

 results are given in the Report for 1883,* the paper being illustrated 

 by a chart ; several Tables showing the temperature, the density, 

 and the ratio of total halogen to density at different depths at the 

 various stations. In 1886, during a cruise of the ''Garland" in 

 the Moray Firth, physical observations were made by Dr. Gibson 

 and Dr. H. R. Mill, who has done so much in the study of marine 

 temperature. The results of these investigations are embodied in 

 two papers in last year's Report,t which are illustrated by four 

 plates and furnished with many Tables. In the same Report there 

 is a paper by Drs. Mill and Gibson describing the apparatus required 

 for marine physical observations ;J and another by Dr. Mill (illus- 

 trated by a chart and two plates) dealing with the physical condi- 

 tions of the sea to the west of Lewis. 



To the Report for 1886 Dr. Mill contributed a paper On the 

 Physical Condition of the Firth of Forth, ^ which is accompanied 

 by a Table giving the density, salinity, and alkalinity of the water, 

 three plates showing the curves of salinity and temperature, and a 

 large bathymetrical chart. 



During September last H.M.S. '' Jackal " was engaged in a 

 cruise of physical investigations, under the charge of Dr. Gibson, 

 along the east coast of Scotland, and across the North Sea to Bergen 

 and Copenhagen. A large number of stations were formed, at 

 which vertical series of temperature, density, and alkalinity observa- 

 tions were made, the gaseous constituents determined, and samples 

 of water collected for analysis. 



* Fourth Report, pp. 189—201, pis. vi, vii, 1886. 



+ Sixth Report, Part iii, pp. 313—34:7, pis. xi— xiv, 1888, 



X Op. cit., pp. 309—812, pis. ix, x. 



§ Fifth Report, pp. 349—354, pis. xx— xxiii, 1887. 



