96 Lunar Raiuloiv. 



It muft be obferved, that he finds great difficulty in the* 

 formation ot" articulate founds; frxmi the efte<Sl of lonjr difufe 

 of his organs of fpeech, there are only a few words that he 

 can pronounce pcrfeftly ; but it is hoped that the fame per- 

 feverance which conquered the firlt difficulties that Hood in 

 his way, will alfo help him over the others. 



LUNAR RAINBOW. 



About feven o'clock on Saturday night, the 24th October, 

 a beautiful Iwiar iris appeared at Edinburgh in the weftern 

 part of the horizon. As the moon was then very near the 

 full, and her altitude above the horizon not very great, the 

 red, yellow, and violet colours of the iris could be eafdy 

 diftinguiflicd, and the bow approached pretty near to a com- 

 plete femicirclc. This phaenomenon continued half an hour; 

 and, as the weftern part of the horizon was during that time 

 covered with an obfcure haze, which rendered it excellently 

 adapted for the reception of the colours, it prefented a moli; 

 beautiful fpe(^\acle to many who had never, till then, the 

 pleafure of obferving it. Arillotle informs us, that he was 

 the firlt who obferved the lunar iris; and adds, that they are 

 never feen but at the time of full moon. It has often ap- 

 peared a matter of wonder to philofophers, how this phaeno- 

 menon fo rarely occurs : but if we confider, that it never ap- 

 pears unlefs the moon be near the oppofition — that ffie comes 

 into this fituation only thirteen times a year; whereas the 

 fun is in a fiatc fitted tor their produiSliou twice every day ; 

 and that the light of the moon is incomparably more faint 

 than that of the fun ; our furprife will quickly vanifh, and 

 we (hall rather be alloniflied at the frequency of their pro-- 

 duiSlion. 



Dr. Garnett, having fitted up an elegant and commodious 

 lefture-room in Great Marlborough-ftreet, intends, we un- 

 derftand, to begin his le*9:ur.es on natural philofophy and 

 chemiliry immediately. The introduftory Icclure will be 

 delivered on the 2d of November, at eight o'clock in the 

 evening. The leftures on experimental philofophy will be 

 delivered every Monday and Friday, at the fame hour; and 

 thofe on chemiftry every Tuefday and Tliurfday, at one 

 o'clock P. M. The medical left urcs will not commence till 

 January 1802. 



