{ 1 
guifh this Comet upon another Return, and thereby 
to fettle its Period j which I cannot at prefent pretend 
to do, not having met with an Account of any former 
Comet that feems likely to have been the fame with 
this, whereof a Defcription has been given particular 
enough to determine this Point. 
2. €~ometes Rom# -ex Monte Aventino obfervatus 
menfe Februario 1737, a Didaco de Revillas Abb. 
Hieronym. R. S. S. 
C irca horam feptimamP. M. diei 16 nobis primum 
in occidental coeli parte Comctcs apparuit, odo 
vel novem gradrbus Venere inferior 3 atque ab ejus 
verticali circulo aliquantulum Meridiem verfus decli- 
nans. Nudo oculo nonnifi albicantem, et crepera 
luce fulgentem Lineolam confpicicbamus : egregio 
tamen Campani Telefcopio Pcd. 6. pr#ter Caudam, 
•qu# in partem a foie averfam protcndebatur. 6c line- 
ol# fpeciem extra telefcopium pr# fe ferebat. Nucleum 
quoquc etfi tenui Athmofph#ra circumundique obte- 
nebratum intilebamur. Quum nullus circuli quadrans 
tunc pr#fto effet 5 Sc viciniorum fixarum confpedum 
nedum nebula interciperet 3 verum & crcpufculum 
fuburaheret, ‘Comet# locus apparens ea node definiri 
minime potuit. 
A die 1 6 ad 19, ficuti Sc poll 2f, plura alia occurrc- 
bant impedimenta, qu# obfervationibus vacate prohi- 
bebant. - Nodibus porro inter 19 6c 26 mediis haud 
aliter apparentem Comet# locum accurate determinare 
licebat, quam Phoenomenon cum Venere comparan- 
do; proptcrea quod parvo dumtaxat Quadrantc utere- 
mur. 
