264 



PROFESSOR C. PIAZZI SMYTH ON 



Table XXXI.— MONTHLY ELEMENTS OF ALL SCOTTISH METEOROLOGY, REDUCED TO 

 ONE CENTRAL GEOGRAPHICAL POINT, VIZ.: 



Latitude = 56° 30' N.; Longitude = 3° 40' W.; Height = 256 Feet; Distance from General Sea-Coast, 

 Eastward, 40; West, 90; North, 120; South, 120 Miles; — and for the Mean Epoch of the 

 Years 1856 to 1887 inclusive. 



Table. 



Old 

 Tables. 



1 

 2 



3 

 4 



5 

 6 



10 



11 

 12 

 13 



14 



15 



16 



17 

 18 



19 

 20 



New 



Tables. 



21 



22 



23 



24 

 25 



26 



26 a 



27 



28 



29 

 30 



Subject. 



Barometric Mean Pressure, 

 Monthly Range, 



Temperature, Mean in Shade, 

 Daily Range, Mean in Shade, 



Mean of Max. Temperature by Day, 

 Mean of Min. Temperature at Night, 



Humidity, Relative, computed from the 



Bulb Thermometer 



Depression of Wet Bulb below Dry, 

 Depression of Dew Point, 

 Elastic Force of Vapour, 

 Grains of Moisture in cubic foot of Air, 

 Grains further required to saturate 

 cubic foot of air, .... 



Rain, Number of Days on which it fell, 

 Monthly Depth of Rainfall, . 

 Annual Depth of Rainfall, 



Wind, Mean Force of, . 



Wind, Direction of, North, 

 ,, ,, East, 



South, 

 „ „ West, 



Wet 



that 



Sunshine, No. of Hours of, per Month, . 

 ,, ,, per Year, . 



Cloud, Mean Amount of, 

 Lightning, 



Auroras, 



Mean Maximum Temperature in Shade, 

 Mean Minimum Temperature in Shade, 



Accumulated Rainfall, Depth, 



Plant-Growth Temperature, .... 

 Accumulations of each kind of Plant-Growth 



Temperature, ...... 



Accumulations made good of Plant-Growth 



Temperature, 



Preparatory only for 27 and 28, . 

 Frost, Exposed in each month, . 

 Fire, Exposed in each month, . . . . 



Wind-force per month, . 



Wind-force, Accumulated Quantities, . 





Terms. 



Inches, 

 Inches, 



° Fahr., . 

 °Fahr., . 



° Fahr., Expd. Bl. B. 

 ° Fahr., Expd. Bl. B. ; 



Sat. =100, . 



°Fahr., . 



"Fahr., . 



Inch, 



Grs., . . . . 



Grs., . 



Days, 



Inches, 



Inches, 



Lbs. Av. on Sq. Foot, 



Days, 

 Days, 

 Days, 

 Days, 



Hours, 

 Hours, 



Hemisphere = 10, 



Days, 



Stations, . 

 Days x Stations, 



Nights, 

 Stations, . 

 Nights x Stations, 



° Fahr., . 

 ° Fahr., . 



Inches, 



Above 42°, or + 

 Above 42°, or + 

 Below 42°, or - 



Below 42°, or - 



Below 32°, or - 

 Above 32°, or + 



lbs. pressure x into days 

 ( The above from be- 

 ( ginning of year. 



Jan. 



487 

 28-3 



1-5 

 3-5 



0-19 

 2-20 



0-40 



17 

 4-03 



2-06 



4 



5 



9 



11 



63 



67 



1-5 



12 



18-0 



2-0 



8 



16-0 



41-5 

 32-5 



4-03 



-155 

 -155 



-155 



-17-8 

 + 34-0 



63 '95 

 63-95 



Feb. 



29-831 

 1-480 



38-4 

 9-9 



56-1 

 29-2 



1-5 

 3-6 



0-20 

 2-30 



0-40 



15 

 3-14 



2-11 



4 



5 



8 



10 



85 



6-5 

 1-1 



1-9 

 11 



20-9 



43-4 

 33-5 



7-17 



-101 



-257 







-256 



-16-0 

 + 44-2 



59-80 

 123-75 



March. 



29-833 

 1-446 



39-5 

 11-8 



64-0 



29-4 



1-8 

 4-0 

 0-21 

 2-40 



0-40 



15 

 2-83 



2-09 



6 



6 



6 



10 



124 



6-4 



1-2 



6 



7-2 



2-0 

 9 



180 



45-4 

 33-7 



10-00 



- 77 

 -339 

 + 6 



-334 



-15-5 



+ 54-4 



64-93 



188-68 



April. 



29-888 

 1-264 



44-2 

 14-1 



73-7 

 32-3 



83 



2-0 

 4-4 

 0-24 

 2-80 



0-50 



12 



2-24 



1-72 



6 



8 

 7 

 8 



162 



6-3 



1-2 



13 



15-6 



1-8 



8 



14-4 



51-3 

 371 



12-24 



+ 66 

 -341 



+ 74 



-267 



-11-0 

 + 64-7 



51-52 

 240-20 



May. 



29-930 

 1-076 



15-4 



81-7 

 35-9 



30 

 6-0 

 0-28 

 3-10 



0-90 



13 



2-27 



1-52 



6 



8 

 7 

 9 



201 



6-2 



1-7 



19 



32-3 



1-0 



2 



2-0 



56-5 

 41-1 



14-51 



+211 

 -341 



+285 



- 57 



- 8-1 

 +72-1 



47-01 



287-21 



June. 



29-928 

 0-919 



54-8 

 15-6 



90-1 

 41-9 



81 



3 

 5-9 

 0-35 

 3-90 



1-00 



13 

 2-53 



1-40 



5 



6 



8 



10 



217 



6-2 



2-2 



26 



57-2 



0-1 







0-0 



62-6 

 47-0 



17-04 



+384 

 -341 

 + 668 



+327 



- 17 

 + 79-7 



42-00 

 329-21 



