42 REPORT — 1844. 



lettering, in the following manner : first, in order to preserve the present no- 

 menclature of the principal stars, all the stars in Argo (that is, in the general 

 constellation, regarded as including the subdivisions above mentioned) indi- 

 cated by Greek letters, by Lacaille, to be retained, with their present letter- 

 ing, under the general name Argo : secondly, all the remaining stars, to be 

 designated by that portion of the ship in which they occur, such as Carina, 

 Puppis, Vela, and Mains, and to be indicated by Roman letters, as far as the 

 5th magnitude inclusive. And no two distant stars, in the same subdivision, 

 to be indicated by the same letter ; but, in cases of conflict, the greater mag- 

 nitude is to be preferred ; and, when they are equal, the preceding star to be 

 fixed upon. 



" 7°. That the constellations, which Lacaille has designated by two words, 

 be expressed by only owe of such words. Thus, it is proposed that the several 

 constellations, indicated by Lacaille as Apparatus Sculptoris, Mons Metisce, 

 CcBlum Scalptorium, Equuleus Pictorius, Piscis Vola^is and Antlia Pneu- 

 matica, be called by the respective titles of Sculptor, Mensa, Ccelum, Pictor, 

 Volans, and Antlia ; contractions which have on some occasions been par- 

 tially used by Lacaille himself, and are very convenient in a registry of 

 stars." 



Such is the plan proposed by Sir John Herschel for a better arrangement 

 of the stars in the southern hemisphere : and, agreeing fully in the principles 

 here laid down, I have not hesitated in adopting them in the construction of 

 the present catalogue, and in the classification of the stars inserted therein. 



On the Meteorology of Toronto in Canada. 

 By Lieut.-Colonel Edward Sabine, B..A., F.R.S. 



[A communication made to the Mathematical and Physical Section at the York Meeting, and 

 directed to he printed entire amongst the Reports.] 



The subject which I am about to bring before the Section consists of a por- 

 tion of the results of the meteorological observations which have been made 

 at the magnetical and meteorological observatory at Toronto in Canada, in 

 the first two years of its establishment. It is well known to the members of 

 the Section, that in conformity with the recommendation made by this 

 Association, the British Government has formed establishments in various 

 parts of the globe, for the purpose of making magnetical and meteorological 

 observations on a systematic plan, and has created a department for the re- 

 duction and publication of the observations. As the officer entrusted with the 

 conduct of these operations, I regai'd it as not less a duty than a pleasure, to 

 communicate, from time to time, at the meetings of the British Association, 

 such of the arrangements, or of the observations themselves, or of the conclu- 

 sions to which they may have led, as I may suppose may be interesting to its 

 members. I have accordingly selected for the present occasion some portion 

 of the results wliich the meteorological observations at Toronto, in 1841 and 

 1842, have yielded, when subjected to a full process of reduction, and care- 

 fully examined. I have preferred the meteorological to the magnetical ob- 

 servations, partly on account of the more popular character of the subject 

 generally, and partly because the conclusions to which the meteorological 

 observations have already conducted appear to possess a completeness and 

 fullness not yet attained in magnetism. The observations, which will be treated 

 of in this communication, were made at every second hour throughout the 

 year, except on Sundays, Christmas day, and Good Friday. Subsequently to 

 the period which will be now passed in review, they have been made hourly, 



