CORRESPONDENCE. 291 



according to Mr. Singleton, to render testing thereby " little better 

 than child's play," to say nothing of the peculiar arrangement I used 

 instead of an eye-piece, which Mr, S. somehow overlooks. 



" Sandicroft. 

 " I certify that I saw the longitudinal stripes on Surirella gemma 

 with Mr. Hickie's ^-inch objective, with the utmost distinctness. 

 This was on the evening of the 23rd day of November, 1871. 



" H. P. Steadman." 



This gentleman could not possibly make any mistake about the 

 lines he speaks of; for I had just previously let him see the very 

 same lines on the very same shell with a ':^ immersion. I showed 

 them also to Dr. Eales, of Dresden, who made a drawing of them then 

 and there. 



I am sorry I cannot in the same way quote chapter and verse for 

 what I have seen with Beneche's No. 7 ; so the following must pass 

 for what it is worth. 



In a private letter to my friend, Mr. Kitton, of Norwich, in which 

 I gave him a detailed account of the performance of Beneche's No. 7 

 on a variety of tests, the following passage occurs, which Mr. Kitten's 

 kindness in returning me my letter has enabled me to extract : — 



" I then put on S. gemma. I was able fairly to bring into view 

 the longitudinal lines." 



But after all, I am not the only person who has seen these 

 longitudinal lines with a ^ inch. Mr. Jabez Hogg, who is the fortu- 

 nate possessor of a Beneche's No. 7 of rare excellence, has done the 

 same with Ms glass ; and did so in my presence, though I do not 

 recollect the illimaination he employed. 



Unfortunately the microscope is a solitary instrument ; and 

 Mr. Brown finds it hard to believe that Mr. Smith has seen anything 

 which he (Mr. Brown) cannot see. Hence come strife and debate. 

 Readers of this Journal will be at no loss for instances. I have also 

 to thank Mr. Singleton for his caution about " diffraction." In return 

 let me caution him against a much more besetting sin of these 

 times — " slowness of heart to believe." 



Yours faithfully, 



W. J. HlOKIE. 



Eeport of Quekett Microscopical Club, Sept. 25th. 



To the Editor of the ^Monthly Microscopical Journal.^ 



Gareick Chambers, November 17, 1874. 

 Sib, — Will you kindly allow me to correct a slight inaccuracy 

 that appeared in the November number containing the above report ? 

 I am there made to say I never found evidence of air in any insect's 

 salivary glands. It should read — 



" In a large number of insects examined he had never found any 

 evidence of tracheal or air sacs forming part of their salivary glands." 



I remain yours very truly, 



William T. Loy. 

 vol. XII. Y 



