10S 



HORIZONTAL MOON. 



XI. 



Reply to the Animadverfions and Experiments ofC. L. on the Sub- 

 jcclof the Horizontal Moon. By Mr. Ezekiel Walker. 



Dear Sir. 



To Mr. NICHOLSON. 



HAT can have induced your correfpondent C. L. to 

 attempt to confute my paper relating to the horizontal moon, 

 with fo much invidioufnefs, is beft known to himfelf". For my 

 own part, I believe that he is perfonally unknown to me, and 

 that I am equally fo to him. 



Whether the The firft flop that this faflidious writer takes to difprove the 



telefcopr be pro- truth of my pofition is a falfe one. He fays, that " if Mr. 



P er . 3 '" r j^. w , Walker's poiition were true, the magnifying power of the 



theory. 



greater appear- 

 ance to object 



fame telefcope would vary with its aperture."* 



C. L. has been very unfortunate in mentioning the telefcope, 

 for the properties of that inftrument will confute every argu- 

 ment which he has ufed againft mv theory, and fhow that his 

 ill conducted experiments, like an igaiifaluu.s, tended only to 

 mi (lead him. 

 The want of* a I dial! drop this {"ubjeci for the prefent, to examine his next 

 ftandard would affertion in the fame paragraph. The apparent magnitude of 

 fceiTwhether a the paper before the eye may become larger, when the candle 

 lefs tight gives a j s (haded with the hand, for any thing that C. L. knows to 

 the contrary, as the increafe is too final! to be perceived by 

 our fenfes; and even if it were ten times larger than it is, it 

 could not be known, becaufe every other object before the eye 

 would increafe in apparent magnitude at the fame time, and 

 in the fame ratio; and confequently leave no ftandard to com- 

 pare the paper with. To elucidate this in a familiar way, 

 permit me, Sir, toafk how would C. L. determine the number 

 of miles between Trofton in Suffolk, and Soho-Square in Lon- 

 don, without fome ftandard meafure, with which to compare 

 that diftance. 



Then follow his " correft experiments of the fame deferip- 

 tion as mine." — My experiments were made to imitate the eye, 

 upon a large fcale. Let us fee how C. L. has imitated nature 

 in his experiments. 



Strictures on 

 C. L.'sexperi 

 inents. 



* Philof. Journal, Vol. IX. p. 235. 



In 



