hO 



DR HUUH ROBERT MILL ON THE 



Table XXIX. — Temperature Observations off Inveraray. 



No 



Date 



No. of Points . . . 



Temp 



Slope 



Actual Slope . . . •! 



No 



Date 



No. of Points . . . 



Temp 



Slope 



Actual Slope . . . < 



1 2 



19.4.8621.6.81 



7 15 



41-7 

 + 0-7 



43-6 



+2-S 



+ 4-7) 

 -1-9) 



3 



10.S.S6 



19 



i.v: 



-r9-5 



+ 10-4 t 

 -0-9 f 



4 

 24.8.86 



7 



46-4 



-:-l0-8 



+11-11 



-0-3 ) 



16.9.86 

 4 



47-7 ■>. 

 + 10-2 



6 

 17.9.862; 



11 

 47-6 

 + 9-3 



i 



86 

 12 



477 

 + 8-4 



8 



17.11.86 

 15 



48-3 



+2-5 



-2-01 



+4-5 ] 



9 



30.12.86 



12 



46-8 



-1-0 



-2-6) 

 -1-6 j 



10 

 5.2.87 



10 

 45-3 

 -2-7 



-3-2 



+ 



1} 



11 



29.3.87 



17 



44-6 



-0-5 



12 



10.5.87 



12 



45-0 



+ 4-1 



+ 4-6) 

 -0-5 ( 



13 



16.6.87 

 16 

 46-6 



+ 7-3 



14 

 8.7.87 



18 

 47-1 

 + 10-3 



15 



16 



17 



18 



19 



20 



21 



22 



23 



24 



25 



26 



27 



28 



16.8.87 



23.9.87 



13.10.87 



5.11.87 



17.12.87 



14.2.88 



23.3.88 



4.6.88 



25.8.88 



27.8.88 



1.9.88 



17.10.88 



26.8.89 



3.9.89 



15 



10 



9 



12 



16 



15 



9 



9 



15 



12 



6 



12 



13 



13 



48-4 



49-1 



49-0 



49-1 



47-5 



45-7 



43-6 



44-3 



47-5 



47-7 



49-7? 



47-0 



48-1 



48-6 



+ 9'9 



+ 7-3 



+5-0 



+ 1-3 



-2-0) 

 +3-3 \ 



-2-8 



-3-9) 

 +1-1 1 



-1-1 



-2-6) 

 +1-5 ] 



-0-8 



+ 2-6 



+ 12-1 



+ 12-1 



+ 10? 



+ 5-5 



+ 8-4 



+ 6-6 



Out of the twenty-one occasions when observations were made at both stations, there was 

 no difference in the mean temperatures of vertical soundings five times, the temperature 

 at Strachur was higher five times (0°'9 as a maximum), and that at Inveraray was higher 

 eleven times (0°'8 as a maximum). On the whole, the mean temperature of the water at 

 Inveraray was o, l higher than at Strachur. Asa rule, the temperature at Inveraray 

 was higher in the warmest months, and approached equality or became colder than at 

 Strachur during the cold months. The slope of the curves was always the same at both 

 stations, but the amount of slope was on the whole 0°*07 greater for Inveraray than for 

 Strachur. On two occasions the slope had the same value, nine times it was greater at 

 Strachur (maximum difference 1°'8), and ten times it was greater at Inveraray (maximum 

 difference 2 o, 0). The slope was greater at Inveraray than at Strachur only during the 

 warming months — from May to September ; during the cooling months it was greater at 

 Strachur, surface heating being stronger at the former, surface cooling at the latter place. 



Change of Temperature in short intervals of time. — There are five cases of observa- 

 tions at the same point within two days, three of these being at Strachur and two at 

 Inveraray. 



Observations on 19th and 20th April 188G at Strachur, Nos. 1 and 2 of Table XXVIII. 

 — The two observations gave identical results below 1 fathoms, the water being practically 

 homothermic at 41 0, 9 ; and the upper 5 fathoms were at 42° '2 on the first occasion, and 

 42°'5 on the second (fig. 29, Plate XXVIII.). The narrowness of Loch Fyne and the 

 numerous disturbing causes, such as wind, rivers, and rainfall, make it hopeless to attempt 

 to measure the effect of radiation in the way suggested for the Skate Island observations. 



Observations on 5th and 7th November 1887 at Strachur, Nos. 1G and 17 (see fig. 30, 

 Plate XXVIII.). — The mean temperature was higher by 0°'l on the second occasion, but 



