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ACCOUNT OF TilE WEATHlE: 



j4t Londonderry in the Tear 1799, 

 By WILLIAM PATERSON, M.D. and U.K. LA. 



tr The greater part of the numbers in the 10th column denote Lightning alone, particularly in the 

 nonths of September, Oftober, and November, when it'took place moflly in the night, and in the ufual 

 nonths for Thunder very little occurred ; the caufe of which may be afcribed to the atmofpherical elec- 

 ricity having been conveyed to the earth by the conduftor, rain, before it had time to accumulate in the 

 itmofphere and form thunder clouds. 



GENERAL REMARKS. 



yjnuarv a good deal of hazy and frtggy weather, with both mo - 

 lerate and keen froft, whilft the winds were chiefly from the 

 nildefl points; the barometer was many days, at the beginning 

 if the month, above 30, and varied little, though fometimes 

 here was heavy rain ; and the flrongeft freezing took place with 

 he wind at weft. — The winds were in general not only foft m 

 cmperature, but moderate in force, there not being more than 4 or 

 ; blowing days.— Thefecircumftancci point out the ct^rafter of 

 his month as unufual for the feafon of the year; it (eews to be 

 ■cmarkablc for a mixture of gentle winds, iharp froft, and damp, 

 oglSy ^''■- — Ffbriiajy contained a great proportion of blowing 



greater part of the feir weather there was a frefh breeze from the 

 N. and fometimes there was a covered (ky, threatning rain, 

 though none fell j whilfl upon the whole the air poflefled a confi- 

 der^blc drying quality. — July produced a quantity of rain, prin- 

 cipally in heavy (howers, yet hay was well faved, owing to great 

 abforption and evaporation going on at the fame time, in conjunc- 

 tion with frequent frefh breezes. — The leading cltaraifter oi Auguft 

 waswctncfr; but as there were fcvcral frclh breezi-sand many 

 (air intervals, more might hate been done in works of hufbandry 

 than was really effefted.— The beginning of Sefitmbtr was re- 

 markably warm ; and there were fome foir days, though a dufiy 



ivcather, particularly on the 7th and 8th at rtight, when there like hazinefs of the air indicated much difengagedmoifture, 



Aerc extraordinary high and penetrating fqually gaJes with confl- 



Jerable quantities of round fnow; between this and the preceding 



Tionth there were 12 dnys of uninterrupted freezing; and whilft, 



in the latter part, it fofiened in its rigour, it was often bluftr^- — 



March, equally as Febru.iiy, was remarkable for blowing weather, 



with fcveral fqually gales at night and heavy fliowers. — Although 



/hich 

 was' confirmed by the hygrometer. Yet the nature of the weather 

 was fuch in general, withrefpeft to exemption firom the moifture 

 collei^ing in cjouds, and good circubiioa by the winds, that 

 field-work might have been better performed by 3 little attention. — 

 In O^ulier the rain was moftly in frequept heavy ftiowers; there 

 were fevcral fair intervals ; and there were fcveral very ufeful frcfli 



the warm winds exceeded the cold in number, in the points taken breeio Hail of an ilnufual fize fell the 14th, about 3 miles 



fingly, yet taken together, the cold were to the warm as 14 to 19 ; 

 and upon the whole it was a rigorous unpleafant month. — /Ipnl 

 was remarkably keen and bluftry; the oldeft pcrfon living did not 

 remember fo much fnow in this month ; the greatell part of it fell 

 on the ;th, which was little fliort of the 8th of the preceding 

 rebruary with refpefl to the degree of wind from the SE. the 

 piercing cold, and drifiiug fnow, — May wasalfo cold, with Tome 

 fevere blowing weather, particularly the ajd and 14th, which 

 were mtift ftormy at nigfn ; and the temperature did not fofien 

 till the 28th. — June wrti col.l in the beginning, but afterwards 



, fair, «arm weather. — During the hazy weather. 



ef heat tuaj on th %ih nf June, ■a.-heniht ilicrmom(ferr<>/e m 74°.- barmtia 30. 31 ; hjgro< 

 ivinJ S. cal'H, fair, andbii^ht. Tht great rfi dtgue "/ cold /wi place en the 30/A 0/ January, -iuhen the ihamameleT ti'oppi 

 imemeler it). 60 ; /lygromeier yi 3-4; If-', fair, /re/f, and fog. Tfie annual quanlitji »/ rai» wai aiiul 36 

 ef 1798, 3 inder, and ihl of 1 797, J inchci. 



Vot. vn. Y y 3 



contained a good deal of brigl 

 Note — TJie greairfl dcgrc 



S. E, of Derry. — Nm/cmier was a cold, blowing month, with 

 much denfe fug, and frequent fevere ftiowers of both rain and 

 hail ; yci the cold and windy weather, together with fcveral J.iir 

 d.iys and dry intervals, anfwered an excellent purpofe to the 



f;irmer. In one of the ftormy nights, the 6i!i, the large 



metal vane was blown from the cupoU of the Exchange, 

 but no pcrfon was Kurt. — ^Though the prevalent winds in 

 Dccem^'tr were from the told poiiits, E. and S. E. with fome 

 fmart gales, yet the degree of congelation was net propoitionably 

 keen. — Litlle ruin fell; but there was a good deal of foggy and 



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