240 CORRESPONDENCE. 



exhibited " beads as a reality " tliey should be drawn as such. The 

 beading has been photographed by Dr. Col. Woodward — does Mr. W. 

 think his work clumsy and inaccurate ? 



Mr. W.'s reiteration that there are no beads in Podura scales is 

 still unsupported by any satisfactory evidence. Dr. Pigott is prepared 

 to demonstrate that the glasses that fail to show them are imperfectly 

 corrected, and that in proportion as the residuary aberration is re- 

 moved they come out more and more clearly. Mr. Beck's experiment 

 proves the existence of furrows on the under-surface of the scales, but 

 does not touch the question of whether or not there are beads between 

 the two membranes of the scale. 



" I knoio not one microscopist of any note who has investigated the 

 subject that believes in him " (Dr. Pigott). 



Can Mr. Wenham mention a single microscopist who has seen Dr. 

 Pigott's experiments and will endorse Mr. W.'s statements concerning 

 them ? If Mr. Wenham has in these attacks unalterably committed 

 himself to the whole extent of his knowledge in these difficult re- 

 searches, and pronounces thus authoritatively Dr. Pigott to be utterly 

 wrong, so much more credit will be due to the latter when his views 

 are finally established. His recent researches on circular solar spectra 

 to test definition opens the whole question anew to those who arc 

 willing to search, rather than carp and cavil at what they will not or 

 have not themselves investigated. 



Fair Play. 



Ee Turberville and the 'English Mechanic' 



To the Editor of the ' Monthly Microscopical Journal.' 



Sir, — A large placard having been issued with a recent number of 

 tlie ' English Mechanic,' in which my name occupies a prominent 

 position, so that it would seem to appear that it was done with my 

 own concurrence, and in which a j)articular motive is attached to you, 

 viz. the refusal to jn-int Mr. Turberville's letters, " because they were 

 favourable to Messrs. Powell and Lcaland," I hasten to repudiate 

 all connection with, or resj)onsibility for, this singular use of my 

 name ; and I herewith attach a copy of the letter addressed to the 

 Editor of the ' English Mechanic' 



I am, yours sincerely, 



G. W. EOYSTON-PlGOTT. 



"Re Turberville. 

 " To the Editor of the 'Englinh Mechanic' 

 " Sir, — A large placard having been circulated with your Journal 

 of September 5th, 1873, in which my name prominently figures, you 

 will permit me, with your usual courtesy, to aver that Mr. Turberville 

 has used my name on this placard without my knowledge or consent, 

 and that I protest against such a liberty. I am under the necessity 



