. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 332 THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. [Nov. satisfied himself by careful examination of tlie recorded observations, could not be accounted for by tlie perturbations of the linown planets ; and that the deviations far exceeded any possible limits of error of observation. In reply to the question. Whether the deviations in question might not be due to the action of an unknown planet?âhe stated that he considered it highly probable that such was the case,âbeing systemat
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 332 THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. [Nov. satisfied himself by careful examination of tlie recorded observations, could not be accounted for by tlie perturbations of the linown planets ; and that the deviations far exceeded any possible limits of error of observation. In reply to the question. Whether the deviations in question might not be due to the action of an unknown planet?âhe stated that he considered it highly probable that such was the case,âbeing systematic, and such as might be produced by an exterior plan>t. I then inquired whether he had attempted, from the indications ad'orded by these perturbations, to discover the posi- tion of the unknown body,âin order that ' a hue and cry' might be raised for it. From liis reply, the words of which I do not call to mind, I col- lected that he had not then gone into that inquiry ; but proposed to do so, having now completed certain works which had occupied loo muc h of his time. And, accordingly, in a letter vvhirh I received from him after his return to Kiinigsberg, dated November 11, 1842, he says,â' In reference to our at Collingwood, I annnunce to you (melde ich Ihnen) that Uranus is not forgotten.' Doubtless, therefore, among his papers will be found some researches on the subject. The remarkable calculations of iM. Le Verrierâwhich have pointed out, as now appears, nearly the true situation of the new planet, by resolving the inverse problem of the perturbationsâif uncorroborated by repetition of the numerical calculations by another hand, or by independent investi- gation from another quarter, would hardly justify so strong an assurance as that conveyed by my expressions above alluded to. But it was known to me, at that time (I will take the liberty to cite the Astronomer-Koyal as my authority), that a similar investigation had been independently en- tered
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