Progress of Jfrononiy in 1805, hjj Lalanck. [Oct. I, 



for the pr.rpofe of leduclng the apparent 

 dittancc^ into true diltances, and thence 

 flcducin^ the lon;^itude ot'a (hip ; formu- 

 la; lor tlic calculation of eclipfes, in* 

 vhich the riffht-afcenfions and decHnri- 

 tions of two ilars are eiBployed ; finally, 

 Tables of Mars, by SI. <lc Monteiro, 

 which give the perturbations in ten equa- 

 tions. *'l'hc volume for 1805 likev.ifc coin- 

 pxizes-various fubiidiary Tables tor cal- 

 culating, without logarithn'is, the right- 

 nfcenlion and declination of a ftar whofe 

 longitude and latitude are known, and 

 that by two dilicrcnt methods : befides 

 a Tabfe of the Horary Ausles of Stars, 

 when they arc at the altitude of o", 

 •which has been comj)ofcd for the pur- 

 pofe of afccrtaininsi among the eclipfes of 

 ihp fatellilij of Jupiter, that whicii there 

 is no i:(;;'c of being able to obferv'e ; a 

 Table of the diftames of the centre of 

 Jupiter from the centre of the fe6tion of 

 tiiu cone of the fhadow which is travcrfcd 

 by the four fatcUites ; Tables of Latitude 

 for thefc fame latellitt s ; the track of 

 the fatellitc in the fiiadow during the dc- 

 nu-durati(ui of the cclipl'c. Thcl'e Tables 

 ferve to calculate the poiitions of the fa- 

 tcUites relatively to the cenU-e of Jupiter, 

 as they are feen, at intervals of fi\ days, 

 for every nonth in the ephemerides : 

 they likewife flu \v whether the fatellite is 

 vilible at the time of the imineifion or 

 enicrlion. Inftead of the general Tables 

 1\liich the author gave in the preceding 

 volume for the aberration and the nuta- 

 tion, he has this time introduced others 

 exaftly funilar to tliofe of ]\I. Dclambre, 

 except that the tjuantities are in minutes 

 and decin.als, in the place of feconds. 

 On fomc of thcfe Tables arc founded very 

 ingenious contrivances for calculation, 

 and the author has witli great Ikill eluded 

 the neccflity of referring to the Tables of 

 Logarithms. This calculation is not al- 

 ways fo fliort as by the ordinary me- 

 thods ; but it polfcircs the advantage 

 Jhat in the problems given for 1804 there 

 is no occafion for any other volume than 

 the Ephemerides; f )r tlte problems con- 

 t.iiiied in that (or If.'Oo, this advantage is 

 confidcrably dimiriillicd, fince it refers to 

 the volume for loO-l. The author has 

 fuppreflcd the Jortmihe from which thcfe 

 Tables were coinpofed. To afcertain 

 their accuracy, it is ncccffary to decom- 

 pofe tilt 111, which is fometimes a talk of 

 great icsj'ith and dininilty, when they 

 are founded on formula limply approxi- 

 mative. 

 W. Canelas has fcut us from Spain the 



Nomtika Almanac for 1007. 'That for 

 180H is in the cmirfe of calculation. 



The Norwegian Academy of Sciences, 

 to which Counlellor Hammer bequcathcd- 

 80,000 francs, together with a library and 

 a cabinet of natural hiftory, will not fail 

 to employ part of its relburces for tiie 

 advantage of atironomy. I have already 

 had oecallon to remark that aitronomy is 

 cultivated in that inhofpitablc climate, 

 where M. Pih\, JMefl'rs. Wib, feaior and 

 junior, and IM. Aubcrt, liavc made va- 

 rious ufcl'ul obl'cr\ation5. 



M. Goldbach, who arrived at Mofcow 

 on the 111 of Ajiril, has tixed the lite of 

 the Obfcrvatory in the Garden of Plants. 

 He expects a circle of three feet made by 

 Berg.?, fucceli(>r to Ranifdcn, arid a me- 

 lidian tclcfoope. nf five feet, by Cary. 

 The Senator De IMouravicii", curator of 

 the Univerlity of Mofcow, patroni/es this 

 cilabiilliment, which cannot fail to pro- 

 cure us excellent obtliu-vations. 



iVi. {Mildbach has determined the lati- 

 tude of the Univeriity to be jj° -11' 32". 

 The Obfcrvatory will be one minute far-. 

 thcr towards the north. Thus the lati- 

 tude given in the Coiiiioilfancc des Teiiipx, 

 5o° Ij' •!,">", is \orv near the truth. 



On the 2oth of November the Grand 

 Penhoiiary of Holland appointed M. 

 Fokker allronomer of the llepublic. Tiiis 

 encourages me to hope that there will bo 

 an Obfcrvatory and inliruments, and that; 

 obfer\ations will at length be made in that 

 country, where the interclls of the navy 

 fhould have caufed alirtmoniy to bcculi 

 tivated long ago. i, have already noticciJ 

 M. I'okker's zeal in the Hillory of Allro-i 

 nomy for lyOl. 



The Emperor, as he paflfed through 

 Turin, proniifcd General IMenou to grant 

 G0,000 francs for the Obfervatory ;'an(i 

 the Academy will invite a practical allro- 

 nomer from France, to make the theore- 

 tical cultivators of the fcicnce faniiliar 

 with obfer\atioii5. M. \'a(Vali J'.andi, ol 

 the Academy, has promifed me not to 

 lofe fight of this ulcful project. 



At Milan the Kinperor has ^iven a 

 penfion of 8000 livres to M. Oriani, the 

 moft celebrated ^tronomical gcometri-- 

 cian in Italy. 



At Lyons, the Municipality, which I 

 had folicitcd to repair tlie Obfcrvatory 

 where I made my lirft obfer\ation iii 

 17-18, has come to a resolution of com- 

 plying with my requeft, and JM. Clerc has 

 fmnilhed plans for the purpofe. 



^Ve have received from Berlin three 

 FiCiich M«uioii>. — I, Mciuoii' contain- 

 in- 



