PROCEEDINGS OF SOCIETIES. 37 



The writer of the paragraph in question evidently intended to convey 

 an idea that an objective by Hartnack was of such unusual merit as to 

 deserve to be singled out for honourable mention beyond all others. 



In case anyone should suppose that this paragraph is sanctioned 

 by the Council of the Society, I beg you will allow me to state that 

 they entirely repudiate it, and have the strongest objection to the 

 abuse of the Society's name for any purpose of trade puffing. 



There is no member of the Council who would refuse to recognize 

 the merit of Mr. Hartnack's work; but justice to other eminent 

 makers would entirely preclude the sort of notice the objectionable 

 paragraph contains. 



Dr. Carpenter's object can be shown distinctly with a good jth 

 or ith, and specimens of Ehomboides have frequently been displayed 

 with ^ inch. 



I remain, Sir, your obedient servant, 



Henry J. Slack, 



See. It. M. S. 



PKOCEEDINGS OF SOCIETIES. 



Royal Microscopical Society. 



King's College, Dec. i, 1872. 



W. Kitchen Parker, F.R.S., President, in the chair. 



The minutes of the last meeting were read and confirmed. 



A list of donations was read, and a vote of thanks passed to the 

 respective donors, 



The Secretary, Mr. Hogg, announced that some beautiful photo- 

 graphs of the 19th band of Nobert's lines Lad been received from 

 Dr. Woodward, of the U. S. Army. Dr. W. had also forwarded a 

 photograph of a diatom, which he called Frustulia Saxonica. He (Mr. 

 Hogg) thought it very much like Navicula rhomboides. He wished 

 some of the Fellows would carefully examine these objects and name 

 them more definitely and correctly. He might mention, with reference 

 to Bhomboides, he was able to resolve it very satisfactorily with an 

 old \ and Wenham's new illuminator. The \ objective was one made 

 by Andrew Ross twenty-five years ago. 



Mr. Slack called attention to the fact that in the diatom photographs 

 there were spurious Hues shown outside the picture of the object 

 itself. 



Mr. Slack then said, the Fellows would perhaps remember the 

 observations made by Mr. Stewart at the last meeting of the Society, 

 which tended to show that the apparent hexagons in certain diatoms 

 were real. Apart from the special optical considerations advanced 

 by Mr. Stewart, the question very much turned upon the appearance 

 displayed along lines of fracture. He had sought out a good many 

 fractured diatoms, and in such forms as Coscinodiscus oculus Iridis, 

 and Triccratium favus, the lines of fracture showed the lines bounding 



