Wtflory ofAfirmttytny for ihi Tear iSCxy, 



by « Wicfcope erf' frotn 20 to 25 feet^ and fivcb a ccltbrate^ 

 optician is worthy of credit. I'he 16th nui«lx*f of the Bihli* 

 tithtque Br'itanm^ue^ publiflied at Geneva, corM^ini^ a large 

 extraei feom thid paper. In the Tranfa^^ions of 1800', 

 Dr. iJorfcheT^ves a long paper on the infltience of the dif* 

 {tM'eut ftxlar nlys and thofe of fcerrdbhaj bodies tocomrtnmicafc 

 Hghtaifwl heat: he has found that the yellow rays ilkminate 

 iw(>ft, jind that the red communicate the greateft degree oi' 

 beat. Attfononiers will make ufe of this informaiion whea 

 tii€jy dbfervc the fun. This paper contains a fej'ietj of curious 

 experiments on light. 



Mr. Playfair^ in the fifth volume of the Edinburgh Tranf- 

 a<Sl.ia>li^, has giv'cn formulae for the figure of the earth. 



A valuable work for geometry,- which treats of the calculu* 

 of derivations publifhed by x^rbogaft, one of our grcatefi: geo- 

 tiietriciana, deferves a place iitt our hiftory of aftronomy. 'f his 

 Work, in pag-e 2)SS^ contains an application of the calculus of 

 derivations to feries which proceed according to the fines or 

 cofines of the multiples of the fame angle : his methods give 

 more facility and perfciSlion to ihe manner of treating them. 



I have received the Ephemerides. of Milan for the year 

 1800, which contain the perturbations of Mars, calculated 

 by Oriani, and his tables of Mars, which will form part of 

 the Ephemerides for 1801. I have received alfo the Epheme- 

 rides from Rome by Oddi, who occupies the obfervatory 

 Gaetani, and the Nautical Almanack for 1804., which Sir 

 Jofeph Banks tranfmitted to us with his ufual zeak 



Gudin has publiflied a poem of 600 lines, containing d 

 biftory of agronomy and an account of the prcfcrit ftate of 

 that fcience. The author has added very copious and in-« 

 flru(^iive note$. This poem is already employed as an agree- 

 able fund of inftruftion for youth under the care of a well 

 known preceptor. But, after fo many interefting works, the 

 hi dorian is obliged to annouace one more voluminous, called 

 Pr'incipcs 7iaturels, ou. Notions generaks- et particulieres de 

 Vlmmenjits de V Efpace^ de VUni'Ver steles Corps cdrjlcs, &c. by 

 Lejoyand, five volumes qUarto, in which the author pretends^ 

 to the difgrace of our country and of the prefent age, to 

 deftrqy the fyflems of Newton and Defcartcs. 



8 During 



