516 



MR OMOND ON THE 



TABLE I.— HOURLY MEAN VALUES. 



Difference in Thousandths of an Inch of Ben Nevis and Fort- William Barometers 



when both are brought to sea-level. 



A minus sign signifies that the Fort-William barometer is the higher, and the absence of sign that 



the Ben Nevis barometer is the higher. 





Spring 



Summer 



Autumn 



Winter 



Year 



Mid- 

 night. 



1 



2 



3 



4 



9 



11 



10 



10 



8 



18 



19 



18 



19 



18 



9 



11 



11 



12 



11 



6 



8 



8 



8 



9 



10 



12 



12 



12 



12 



8 



15 

 12 



9 

 11 



12 



7 



7 



8 



9 



10 



11 



12 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



-4 



-11 



-17 



-20 



-21 



-21 



-19 



-16 



-15 



-14 



-9 



-6 



1 



4 



9 



9 



3 



-3 



- 6 



- 8 



- 8 



- 7 



- 6 



- 7 



- 7 



- 4 



-1 



1 



6 



12 



16 



18 



13 



7 







- 3 



- 8 



-10 



-11 



-11 



-11 



- 7 



1 



3 



9 



10 



12 



13 



p 



8 



7 



4 



1 



- 3 



- .5 



- 6 



- 4 







4 



5 



7 



6 



7 



6 



5 







- 4 



- 7 



- 9 



-10 



-10 



-10 



- 9 



- 6 



-1 



1 



6 



8 



11 



12 



23 



Mid- 

 night, 



10 

 20 

 14 

 6 

 12 



11 

 20 

 13 

 5 

 12 



Differences of Temperature, Fort-William being the higher throughout. 



Spring 



Summer 



Autumn 



Winter 



Year 



Mid- 

 night. 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



23 



Mid- 

 night. 



13'6 



13-0 



12-3 



11-7 



11-3 



11-0 



10-8 



12-0 



13-0 



14-8 



15-9 



17*0 



17-8 



187 



19-5 



20-0 



205 



20-3 



20-0 



18-9 



17-2 



15-8 



14-7 



13-8 



130 



12-8 



12-4 



12 



11-8 



1T4 



113 



11-8 



13'2 



14-1 



15-0 



15-6 



16-4 



16-7 



17-2 



177 



18-3 



18-2 



18-5 



18-4 



177 



16-2 



15-1 



14-1 



13-2 



12-5 



10-3 



10-2 



9-9 



9-5 



97 



9-5 



9 2 



9-5 



9-8 



10-1 



10-6 



12 



12-8 



13-8 



14-5 



15-1 



15-6 



15-2 



14-1 



12-9 



11-9 



11-3 



10-7 



10-1 



9-6 



11-0 



10-7 



10-3 



103 



10-0 



10-0 



9-9 



10 -o 



9-8' 



9-6 



9-8 



10-4 



11-3 



12-2 



12-8 



13*3 



13T 



12-2 



11-7 



11-0 



10-4 



10-3 



10-3 



10-1 



10-0 



11-9 



11-6 



11-1 



10-8 



10-6 



10*4 



10-4 



11-2 



11-7 



12*4 



13-0 



14-0 



14-6 



15-5 



16-1 



16-7 



16-8 



16-6 



16-0 



151 



13-9 



18-1 



12-4 



11-8 



11-5 



Ian. 



Mean Temperatuhes, being the Average of the Ben Nevis and Fort-William Temperatures. 



Mid- 

 night. 



Spring 



34-1 



33- 



Summer . 



46-8 



46- 



Autumn . 



39 1 



38- 



Winter . 



29-3 



29- 



Year 



37-3 



37- 



•6 33-1 

 •4 46-0 



32-9 

 45-6 



38-5 J 38-3 

 28-8 28'8 

 36-6 36-4 



32-6 

 45-4 

 38-1 

 28-6 

 362 



32-6 

 45-4 

 37-8 

 28-4 

 36-0 



34-2 

 47-2 

 377 

 28-3 

 36-8 



35'6 

 48-2 

 38-3 

 28-1 

 37-5 



10 



37-3 

 49-5 

 39-6 

 28-3 



•7 39 



11 



40-0 

 51-4 

 417 

 29-3 

 40-6 



12 



40-8 

 52-0 

 42-5 

 30-0 

 41-3 



13 



14 



15 



42-4 

 53-8 

 43-7 

 30-8 

 42-7 



16 



42-2 

 53-6 

 43-3 



30-4 

 42-4 



17 



41-6 

 53-2 

 42-4 

 30-0 

 41-8 



18 



19 20 



40-7 



39-4 



52-6 



51-6 



414 



40-6 



29-5 



29'3 



41-0 



40-2 



37*9 

 50-1 

 39-7 

 29-2 

 39-2 



21 



22 



36-8 



36-0 



48-9 



47-9 



39 3 



38-7 



29 1 



29-0 



38-5 



37-9 



23 



35-2 



47-1 

 38-4 

 28-9 

 37-4 



Mid 

 night. 



34-4 

 46-5 

 38-1 

 28-7 

 36-9 



pan 



|— 

 7'3 



94 







'9-2 



9-0 



Mean Temperatures required to make Ben Nevis and Fort- William Barometers agree at Sea-Level. 



Spring 



Summer 



Autumn 



Winter 



Year 



Mid- 

 ! night. 



353 

 49-2 

 40-3 

 30-1 

 387 



1 



2 



3 



35-0 



34-4 



34-2 



48 -9 



48-4 



48-1 



40-2 



39-9 



39 9 



301 



29 9 29-9 



38-6 



38-2 



38-0 



337 33 



47-8 47 



39'5 

 29 8 

 37-7 



33-5 

 47-2 

 39-3 

 29 4 

 37*4 



34 2 

 47-8 

 39-2 

 29"2 

 37-6 



10 



35-1 36*0 



48-7 

 39 6 

 29'2 

 38-2 



49 3 

 40-2 

 29-1 



38-6 



11 



37-2 

 50-3 

 40-6 

 29-4 

 39 4 



12 



13 



39-3 

 52-2 

 41-6 

 30-0 

 40-8 



14 



40 1 

 52-6 

 42-1 

 30-1 

 41-2 



15 



40-4 

 52-9 

 42 3 

 30 3 

 41-5 



16 



40-4 

 53-1 

 42-4 

 30-4 

 41-6 



17 



40-4 

 53*1 

 42-5 

 30-5 

 416 



18 



39-9 

 52-7 

 41-8 

 30-2 

 41-2 



19 



39-5 

 52-4 



41-8 

 30-2 

 41-0 



20 I 21 



22 



38-4 

 517 

 41-0 

 30-0 

 40-3 



380 

 51-0 

 40-9 

 300 



40-0 



37-2 

 50 3 

 40-4 

 29-8 

 39-4 



23 



36-5 

 497 

 40-2 

 29-7 

 39-0 



Mid- 

 night. 



h 



35-8 fWfi ~ 



49-1 

 39-8 

 29-4 

 38'5 



501 

 KH * 

 M : 



IN 



— Is 







