[ s^s 1 



?fpe!$ inllcad of attra»5lmg other matter, p. 364. See Heat. Conje(5lure on the 

 increafe of the weight of ice on being cooled, ibid. 



TFe^ hiXeSf difficulty of going through the woods there, p. 19, 



Wil/oTtj Mr. See Combujiion. 



IVireSf A Defcripiion of a new Syflem of, in the Focus of a Telefcope, for obferving 

 the comparative Right Afcenfions and Declinations of coeleflial ObjciSts j together 

 with a Method of i«veftigating the fame, when obferved by the Rhombus, thojgh it 

 happen not to be in an equatorial Pofuion, by the Rev. Francis WoUifton, LL.B» 

 p. 346. The author twice difappoimed in attempting ro afcertain the right afcenfions 

 and declinations of the ftars he had laid down, p. 346, 347. The rhombus is very good 

 in theory, but feldom true enough to be depended on, p^ 347. A very fmall error in 

 ©bferving the paffage of a flar naakes a very material -difference in the refult, ibid. 

 Trial with a fquare placed angularly, which feems to anfwer better, ibid. See,£,jua- 

 ierial Micromeitr, Tab. XII. fig. i. explained, p. 347. Properties and advantages of 

 the fquare preferably to the rhombus, p. 348. Method of redlifying the erroneous 

 pofition of the inftrument by the formula given by M. De la Lande in his Aflro- 

 aomy, p. 349, Formula conftruded by the author's fon, for inveftigating the com- 

 parative right afcenfions and declinations of ftars, ibid. Application of the formulae, 

 p. 551. How to deduce the angle of deviation from the true equatorial pofition ia 

 the new fyflem of wires, p. 352. 



WoUaften, Rev. Francis, LL.B. Se© Wires, 



Z. 



^ii', Francis de. See Aflronomkal Oh/ervationu 



FROM THE PRESS OF J. NICHOLS, 



Vol. LXXV, X x » 



