182 



RECORD AND RESULTS OF 



we have found to be 8j° on the average clnrhig the year. In March, 1861, Dr. 

 Hayes visited the harbor, and recorded the following temperatures by thermometer 

 No. 10. 



ISth 10 P.M. 



Temperature 



—47° 



Wind N. 



Force 2 



19tli 8 A.M. 







—26 (ill 



sun) Calm 





19th 9 P. M. 







—48 



Wind N. by E. 



" 2 



20th 6 A. M. 







—66.5 



" N. 



" 1 



20th 9 P. M. 







—46 



" N. 



" 2 



21st 6 A. M. 







—68 



" N. 



" 1 



21st Noon 







—50 



" N. 



" 5 



Applying the correction for errors of graduation, avc obtain the following com- 

 parisons of temperature. 





Port Foulke. 



Van Rensselaer. 



Difference (R— F). 



March 18th 10 P. M 



— 30°.T 



—430.4 



—120.7 



19th 9P. M 



— 16.9 



—44.4 



—27.5 



20th 6 A. M 



—16.4 



—62.9 



—46.5 



20th 9 P. M 



—28.2 



—42.4 



—14.2 



" 21st 6A.M 



—31.2 



—64.4 



—33.2 



" 21st Noon .... 



—25.0 



—46.4 



—21.4 



The average difference on these four days is 26° nearly, and the greatest difference 

 observed, March 20, 6 A. M., is 46 g°, Van Rensselaer Harbor being so much coklcr. 

 The greatest cold recorded by Dr. Kane (February 5th, 1854) was — 66°.4, which 

 exceeds the above on March 21 A. M., by 2° only ; the month of March was 

 decidedly the coldest month according to Dr. Kane's observations. 



During the above four days of comparison the wind at Port Foulke was N. E. on 

 the average ; at Van Rensselaer Harbor it was N. 



Diurnal Fluctuation of the Temperature of the Air. 



Taking monthly means of the observed temperature at each hour of the day, and 

 referring the readings by thermometers No. 7 and 6, in November, to thermometer 

 No. 3 used during the second half of that month, we have the following bi-hourly 

 mean values from which to deduce the diurnal fluctuations. 



October 



November 



December 



January 



February 



March 



April 



May 



.June 



July 



+21. 

 +5, 

 +1. 



—10. 



—23. 



+20.95 



+5.72 



+2.00 



—9.55 

 —23.47 

 -23.82-24, 

 —22.29—22. 

 —13.63—14. 

 +18.34+20. 

 +30.78+32. 

 +39.37+39. 



+21, 

 +5. 

 +2, 

 —10, 

 —23, 

 —22, 

 —22, 

 —12. 

 +21. 

 +33, 

 +40, 



+21. 



+6. 



+2. 

 —11. 



22. 



—21! 

 —20. 

 —10. 

 +23. 

 +33. 

 +42. 



+21, 

 + 6, 

 +2, 



—10. 



—22. 



—21. 



—19. 



—10. 



+24. 



+35, 



+43, 



+22.19 

 +7.53 

 +3.22 

 -10.66 



42j— 22.23 

 27—21.09 

 55—17.98 

 02 —8.79 

 43+24.92 

 07+35.78 

 33 +42.98 



+22.48 

 +7.77 

 +3.26 

 —10.56 

 —22.84 

 —20.11 

 —14.64 

 —8.00 

 +24.60 

 +36.59 

 +44.78 



+22. 



+7. 



+3. 



—9. 

 —23. 

 —21. 

 15. 

 -8. 

 +24. 

 +35. 

 +44. 



+21. 

 +7, 

 +3. 



—10. 



—23. 

 21. 



—18. 

 —9. 



+24. 



+35. 



+43. 



+21, 

 +7, 

 + 3, 



—10, 



—23. 



—21. 



—19, 

 10, 



+22. 



+ 34 



+42. 



+21, 

 +6, 

 +3, 



—11. 



—23. 



—21. 



—20. 

 12. 



+20. 



+32. 



+41. 



,26+20.48 

 is: +5.87 

 42 +2.49 

 36—10.16 

 21 —23.11 

 63 —22.75 

 48—21.78 

 39—12.97 

 61+19.48 

 57+31.58 

 69+39.16 



