Rlouthly Meteorological Register, at tlie Provincial Ma^nciical Observatory, Toronto, Canada West.— April, 1855. 



Latitude, 43 dei/. 39.4 min. North. Longitude, 79 deg 21. min. West. Elevation above Lake Ontario, Wifeet. 



— 



Barom. at temp, of 32 deg. 



Temp, of the Air. 



Mean 



Tension of Vapour. 



Humid'y of Air. 



■Wind. 





















Temp. 



-t-or- 











Rain 















































Snow 









10 





6 



2 



10 





of the 



6 



2 



10 





6 







10 











Mean in 



in 



ft 



Ga.m. 



2 P.M. 



P.3I. 



Mean. 



A.M. 



P.M. 



P.M. 



m'n. 



Average 



A.M. 



P.M. 



P.M. 



m'n 



A.M 



•73 



P.M 



■78 



P.M 



m'j; 



6 a.m. 



2 P.M. 



10 p.m. 



Vel'j 

 26-40 



Inch. 



Inch. 



1 



29.256 



29-263 







25°5 



o 



26-2 



o 







o 



0-102 



0-113 







_ 



NWbW 



NWbfl 



N W 



0^1 



? 



■412 



•469 



29-636 



29^529 



12^2 



30-7 



21-9 



22-1 



—14-5 



•053 



•076 



0-097 



0^076 



65 



43 



■81 



■63 



NWbW 



NWbW 



NWbW 



22-10 







s 



•82'' 



•904 



•874 



■875 



18^4 



37-0 



27^4 



27^6 



— 9^4 



-071 



•143 



■127 



■112 



67 



65 



84 



72 



NN W 



S 



Calm. 



3-90 







4 



•918 



•894 



•822 



.872 



25^5 



44^5 



29-8 



33^3 



— 4^1 



•104 



■128 



■148 



■132 



74 



44 



89 



71 



Calm 



Sb E 



Calm. 



1-48 





... 



5 



-674 



•503 



•317 



■483 



32-3 



46-0 



36-0 



38-1 



+ 0-4 



•170 



■173 



■194 



■182 



94 



57 



92 



81 



EbS 



ESE 



N 



3-03 





... 



fi 



•233 



•345 







32^9 



42-3 















•173 



■192 











93 



72 







— 



NN W 



NW 



NWbN 



12-25 



Inap. 





7 



■580 



•526 



•433 



■508 



24^4 



40-2 



31-6 



32^] 



— 6^3 



•113 



■123 



•144 



■131 



84 



50 



80 



73 



NbE 



SSE 



SWbS 



5-16 







8 



•379 



•306 







34^8 



54^3 



. — . 



— 





•176 



■185 



. — , 



— 



88 



45 



— 



— 



Calm 



SWbS 



NWbN 



8-83 



0^635 



... 



9 



•507 



•516 



•536 



■517 



32-9 



53-2 



39^1 



42^6 



+ 3^6 



•176 



■177 



•214 



■197 



95 



44 



91 



77 



SS W 



w 



Calm. 



6-95 



0-015 





in 



•451 



•489 



•569 



■506 



36-2 



40^8 



32^3 



36^2 



— 3^3 



•199 



■138 



•156 



■163 



94 



55 



86 



79 



SbW 



■WN.W 



Calm. 



14-53 





l-'i 



11 



•668 



•800 



•913 



■808 



32-fi 



43^6 



36^6 



37^5 



— 2^3 



•152 



•137 



•189 



•160 



82 



49 



87 



74 



NWb N 



NN W 



NN W 



21^09 







12 



•963 



■906 



•882 



■914 



33-0 



51^2 



37^6 



40-4 



+ 0-2 



•148 



•109 



•182 



•146 



78 



29 



81 



62 



NN W 



NWbN 



NbW 



7^98 



<•• 



0-1 



13 



•813 



■726 



■586 



•687 



36-0 



36-3 



35^5 



36-7 



— 8-7 



•186 



•169 



•177 



•181 



88 



79 



86 



84 



NWbN 



E 



NE 



4-88 



0-655 



... 



14 



•387 



■345 



•582 



•442 



38-1 



60^5 



41-6 



47^3 



+ 6^6 



•220 



•375 



■228 



•242 



96 



72 



87 



78 



Calm 



SS W 



NN W 



7^01 





... 



IS 



•656 



•654 









33-5 



50-6 



— 



— 



— 



•158 



•224 







— , 



82 



61 



— 



— 



NWbN 



S 



Calm. 



1^99 







Ifi 



■761 



•749 



•746 



•751 



31-2 



62^0 



38-8 



45-6 



+ 4^1 



•149 



•312 



•180 



•221 



84 



57 



77 



72 



Calm 



SbE 



Calm. 



2^17 



... 





17 



■659 



•528 



•625 



■591 



40^6 



59-8 



47^6 



50-5 



+ 8^8 



•224 



•264 



•287 



•265 



89 



52 



89 



75 



SE 



ESE 



Calm. 



1-78 



0-095 



... 



18 



■5-52 



•441 



•457 



•473 



51-3 



62-9 



47^0 



53-6 



+11-5 



-350 



•400 



•273 



•349 



94 



71 



86 



86 



EbN 



Calm 



ESE 



4-27 



0-025 





19 



■448 



•472 



■485 



■467 



51^7 



62-8 



49^5 



55-0 



+12^7 



•339 



■333 



•312 



•336 



90 



60 



89 



80 



Calm 



NbE 



Calm. 



1-74 



Inap. 



... 



20 



■467 



•623 



■786 



■639 



45^2 



60-9 



43^4 



49-0 



+ 6^2 



•279 



■283 



■184 



•247 



93 



54 



67 



73 



N 



SbW 



Calm. 



4-94 





... 



21 



•814 



•729 



■601 



■707 



35^0 



63^0 



46-3 



48-3 



+ 5^2 



•166 



■280 



■266 



•233 



82 



51 



86 



71 



Calm 



SE 



Calm. 



1-27 



... 



... 



22 



•563 



•662 











44^2 



61-5 













•238 



■226 







— 



83 



42 



— 



— 



Calm 



NbW 



NbW 



9-29 



... 





23 



■811 



■754 



■704 



■757 



38^1 



62-1 



44-2 



49-7 



+ 6^0 



•166 



■299 



■238 



■239 



72 



55 



84 



68 



Calm 



SF 



Calm. 



0-61 





... 



24 



■655 



•478 



■482 



■537 



40-4 



63-8 



58-0 



•55-0 



■4-11-0 



•221 



■325 



■338 



■301 



89 



56 



72 



71 



Calm 



ESE 



W S W 



3-60 







2.5 



■704 



•765 



■674 



■713 



45^9 



48-5 



43-4 



45-8 



-t- 1-4 



•276 



•296 



■255 



■269 



90 



88 



92 



88 



Nb W 



EbN 



EbN 



6-54 



0-695 





26 



■371 



•524 



■861 



■596 



44-5 



51-6 



39-2 



45-4 



+ 0-7 



•274 



•226 



■180 



■228 



94 



60 



75 



76 



Calm 



NWbN 



WNW 



14-43 







27 



■939 



■914 



■990 



■950 



36-7 



53-3 



35-5 



42-7 



— 2-3 



•152 



•082 



■127 



■135 



71 



19 



62 



52 



WbS 



N W 



NbW 



11^29 







28 



■988 



•942 



■809 



■903 



35^5 



40-0 



34-5 



37^0 



— 8^4 



•180 



•112 



■157 



■158 



87 



45 



78 



73 



Calm 



E 



E 



8-11 



Inap. 





29 



•717 



•683 



, . 







36^3 



39-6 







. 



: 



•198 



•211 



— 



. — 



93 



88 



. — 



— 



EbN 



E 



EbN 



6-65 



0-440 





30 



•567 



•415 



■449 

 29-6.59 



■470 



40-2 



54-1 



48^6 



47 



42^4 



-f- 0^9 



•235 



■317 



■300 



■283 

 0-208 



95 



^5 



78 



89 



89 

 -75 



EbN 



ESE 



Calm 



2^79 

 7^57 



0-070 

 2-0 



... 



M 



29-664 



29-642 



29-654 



35-7 



5b2 



39-4 



4- 1-4 



0-192 



0-220 



0-206 



6-11 



10-78 



5-25 



1-6 



Highest Barometer 29^998, at 8 a.m. on 28th ■( Monthly range : 



Lowest Barometer 29-233, at 6 a.m. on 6th J 0-765 inches. 



Highest registered temperature 69°-4, at p.m., 14th \ Monthly range : 

 Lowest registered temperature 10°-7, at a.m. on 2nd J 58°-7. 



Mean Maximum Thermometer 52°-93 1 Mean daily range: 



Mean Minimum Thermometer 32°-06 / 20.87 



Greatest daily range 37°-2, from p.m. of 14th to a.m. of 15th. 



Least daily range 5°-7, from p.m. of 29th, to a.m. of 30th. 



Warmest day 19th. Mean temperature 55°-02"l Difference, 



Coldest day 2nd. Mean temperature 22°-10 f 32°^92. 



Greatest intensity of Solar Kadiation, 81°-5 onp.m.of2]st "I Range, 

 Lowest pointof Terrestrial Radiation,8°-6 ona.m. of 2nd / 72°-9. 

 Aurora observed on 9 nights: viz. 4th, 7th, 9th, 11th, 12th, 14th, loth, 



20th and 22nd. 

 Possible to see Aurora on 19 nights. Impossible on 11 nights. 

 Raining on 8 days. Raining 23-0 hours; depth, 2-030 inches. 

 Snowing on 3 days. Snowing 8-0 hours ; depth 1-6 inches. 

 Mean of Cloudiness, 0-51. 

 Halos were observed round the moon on the 3rd at midnight and 21st 



at 10 p.m. 

 Thunder storms occurred on the 14th, 17th, 18th, 19th and 29th. 



Stun of the Atmospheric Current, in miles, resolved into the four Cardinal 

 directions. 



North— 2937-92 Wesl^-2581^36 South.— 624^56 East— 875^65. 

 Mean direction of the Wind, N 36° W. 

 Mean velocity of the Wind, 7-57 miles per hour. 



Maximum velocity, 40-0 miles perhour, from 11 a.m. to noon on 26th. 

 Most windy day, the 1st; mean velocity, 26^40 miles per hour. 

 Least windy day, the 23rd; mean velocity, 0-61 " " 



Most windy hour, 1 p.m. ; Mean velocity, 11-76 miles per hour. 

 Least windy hour, 5 a.m. ; Mean velocity, 4-35 miles per hour. 

 Mean diurnal variation, 7-41 miles. 



1st. The most windy day yet recorded at the Observatory. 

 4th. Robins seen. 7th. Blue birds seen. 



8th. Butterflies numerous. 9th. Frogs first heard. 



13th. Swallows observed. 14th. First thunder storm of the season. 



16th. Ice totally gone from Toronto Bay. 



18th. Violent thunder storm and hurricane from 5-30 to 6-30 a.m. 

 during which the wind for 10 min. (5-55 to 6-05 a.m) fully attained 

 the velocity of 38 miles per hour. Heavy rain and large hailstones 

 fell during the storm. (For details see Canadian Journal. 



21st. In digging on the north side of the tower at the Observatory the 

 ground was found frozen to the depth of 2 feet 9 inches. 



27th. 5-30 a.m. ice ^- inch thick on smaU ponds and pools. 









Comparative Table for April. 









Temperatui 



e. 



l-iain. 1 Snow. 



Wind 





K 























Mean. 



from 



Av'ge 



Max. 

 obs'Td 



Min. 

 obs'Td 



Range D's. 



Inch. 



D's. 



Inch. 



Mean 

 Velocity. 





1840 



42-4 



+1-1 



65-9 



25-3 



40-614 



3-420 



2 









1841 



39-2 



-2-1 



62^9 



22-1 



40-8 



3 



1-370 



3 





0-51 



lb. 



1S4?1 



43-1 



+1-8 



89-5 



21-6 



67-9 



8. 



3-740 



2 



... 



0-57 



lb. 



1843 



40^9 



—0-4 



70-0 



15-1 



54^9 



7 



3^185 



3 



0-1 



0^46 



lb. 



1844 



47-5 



+6-2 



74-5 



17^2 



57-310 



1^515 



1 



Inap. 



0^24 



lb. 



1845 



42-1 



+0-8 



66-0 



14-8 



51^211 



3^290 



4 



1-5 



1^00 



lb. 



1846 



44-0 



+2-7 



79-4 



24-4 



55^010 



1^300 



2 



1-3 



0^55 



lb. 



1847 



39-2 



—2-1 



65-6 



8-4 



57^2 8 



2^870 



2 



4-0 



0^59 



lb. 



1848 



41-3 



0-0 



65-4 



26-5 



38-9| 5 



1^455 



1 



0-5 



4-89 



Miles. 



1849 



39-0 



—2-3 



70-9 



23-2 



47-710 



2^655 



2 



1-7 



7-50 



Miles. 



18,50 



37-9 



—3-4 



63^2 



18-2 



45-0! 7 



4^720 



2 



1-1 



7-64 



Miles. 



18.51 



41-3 



0-0 



59-2 



25 8 



33-411 



2^295 



3 



1-2 



8-07 



Miles. 



18.52 



38-2 



—3-1 



53-8 



19-8 



34^0' 6 



1^990 



4 



9-4 



6^68 



Miles. 



18.53 



41-9 



+0-6 



65-7 



27-0 



38-710 



2^625 



1 



1-0 



5^20 



Miles. 



18.54 



41-0 



-0-3 



65-1 



22-3 



42-812 



2-685 



4 



2-7 



6-82 



Miles. 



1855 



42-4 



+1-1 



63-8 



12-2 



51-6 8 



2-030 



3 



1-6 



7-57 



Miles. 





0-56 

 6-80 



lbs. 



M'n. 



41.34 





67 --55 



20-24 



47-31 8-7 



2-571 



2^4 



2-0 



Miles. 



