Lectures on astronomical theories . ition of compounded ABERRATION. 25 force resulting from two independent motions.* It may beallowed that as a supposed case belonging to the composi-tion of force, if the materiality of light be admitted, theremay be standing-room on the theory for an argument, andowing to the wholly hypothetical character of the theory,the demonstration of its fallacy by such argument mightbe, to say the least, difficult. I have endeavoured else-where to show in what manner the reality of the supposedaberration of light may be astronomically subjected toexperiment. * In cons
Lectures on astronomical theories . ition of compounded ABERRATION. 25 force resulting from two independent motions.* It may beallowed that as a supposed case belonging to the composi-tion of force, if the materiality of light be admitted, theremay be standing-room on the theory for an argument, andowing to the wholly hypothetical character of the theory,the demonstration of its fallacy by such argument mightbe, to say the least, difficult. I have endeavoured else-where to show in what manner the reality of the supposedaberration of light may be astronomically subjected toexperiment. * In considering Herschels illustration the case may be simpli-fied by conceiving the tube long enough to reach from the earth tothe star. Cut oftthe terrestrial end of the tube within a few feet ofthe observers eye, and call it a telescope; the telescope will bedirected towards the place of the star, not towards a place at aaangular distance of 20 away from it. LECTURE THIRD. THEORIES OF LIGHT BASED OX ASTRONOMICAL OBSERVATION. JOHN HARRIS. LOVELL PRIXTIXG AND PUBLISHING COMPANY JULY, 18TG. LECTURE THIRD. INTRODUCTORY OBSERVATIONS. In continuing an are;ument that certain mistakes of aserious character exist at the present time in the theories ofPhysical Science, and in pi-oceecling to specify those mis-tal<es, I would remark, assuming that my argument will besubstantiated, that no immediate source of danger to whichmodern science is exposed exceeds that arising from thesupposition that human science, at the present or any otherepoch in the progress of human knowledge, is bound toaccount with certainty and decision for every difficult problemand mysterious phenomenon wiiich is brought under itsconsideration. To conceive, form and construct a tentativeassumption or theorj, if the assumption or theory be scien-tifically constructed, is certainly quite legitimate. To pushthe theory as far onwards as existing knowledge will enableus, so as to intelligibly interrogate nature as to the fac
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