260 PKOCEEDINGS OF SOCIETIES. ref^L^i.^'f^T^'TS"' 



History Society, soon after tlie award was made, two of the members 

 of that Committee stated the facts, as Mr. Stodder has reported in his 

 comnmnication to you in regard to the resolving of the 19th band by 

 the Jjjtb objective made by E. B. Tolles, 



It is no easy matter to resolve their infinitely fine lines. No one, 

 unless he has educated his eye and hand to this intensely fine work, 

 can bring about all the delicate arrangements of light and adjustments 

 of objective absolutely requisite to the performance of seeing the 



TTWoTT^l^^ of an inch. 



Not louff since I endeavoured to show to a gentleman, considered 

 an expert in microscopy, the lines in the 14th band by Tolles' _|th 

 immersion. It was with difficulty he could see the band, and failed 

 of seeing the lines composing it, when to my eye they were as clearly 

 defined as the ruled lines on a sheet of music paper ; he therefore stated 

 " that the lines had not been resolved ! " 



My friend Mr. Stodder and I have given much time to this work 

 upon naturally and artificially lined objects, and with objectives of 

 almost every maker, and think we know when we see true and when 

 spectral lines. 



I do not personally wish for any credit to be given me as an ob- 

 server ; but I do greatly care for the honour of oiu* American optical 



instruments. 



Most respectfully yours, 



E. C. Greenleaf. 



PEOCEEDINGS OF SOCIETIES.* 



EoYAL Microscopical Society. 



King's College, April 13, 1870, 



Eev. J. B. Eeade, M.A., F.E.S., President, in the chair. 



The minutes of the last meeting were read and confirmed. 



A list of donations which had been received was also read, and a 

 vote of thanks passed to the respective donors. 



It was announced that the qiiestion as to the best day for holding 

 the meetings of the Society had been brought before the Council. Many 

 Fellows of this Society were also Fellows of the Geological, which held 

 its meeting on the same evening ; they were thus unavoidably absent 

 from the one or the other. Moreovex", as the second Wednesday in 

 the month often fell late, it was attended with much inconvenience to 

 the Editor of the Journal. The Council therefore suggested that the 



* Secretaries of Societies will greatly oblige us by writing their reports legibly 

 — especially by printing the technical terms thus : H y d r a — and by " underlining " 

 words, such as specific names, which must be printed in italics. They will thus 

 secure accuracy and enhance the value of their proceedings. — Ed. M. M. J. 



