78 PROGRESS OF MICROSCOPICAL SCIENCE. 



composing the vesicle will be seen to shrink up into folds, on which 

 are seen the adhering granules. When the plants are full grown the 

 epidermis is furfuraceous, or having a number of minute scale-like 

 processes attached to it, as if it were a very thin outer membrane 

 broken up." A very able note is appended to the paper by Mr. W. 

 Archer, of Dublin, in which this authority criticizes some of the 

 author's statements. 



Delhi Ulcers. — We have received from the author, Dr. Fleming, a 

 short note on these ulcers, in which he says that last year a partial 

 microscopical examination of the ulcers, which affect the nose of most 

 dogs in Delhi, was made in connection with a few experiments to 

 ascertain their nature. The result of this investigation showed that 

 they were similar to those which occur on the human subject, and also 

 proved that dogs, as well as men, can easily be inoculated by the 

 cellular substance from an undoubted Delhi sore. Delhi ulcers have 

 been proved to be contagious. 



The Bailey Diatoms at the Boston Society of Natural History. — 

 Prof. H. L. Smith writes in the ' Lens' (Nov., 1872) with regard to 

 these. He states that they are not at all equal to what Mr. Bailey 

 possessed when alive. Hence he thinks that they have been stolen or 

 taken away. He says it " is well known that Prof. J. W. Bailey 

 bequeathed his microscopical collection, his collection of Algae, his 

 books on botany and microscopy, his memoranda and scientific cor- 

 respondence, to the Boston Society of Natural History. The Alga?, 

 books, and memoranda are, I believe, still about as Prof. Bailey left 

 them ; but the slides of Diatomaceae, and more especially the crude 

 materials left by him, have not been so fortunate in escaping the grasp 

 of greedy collectors. Perhaps I am mistaken, but either the collec- 

 tion of Prof. Bailey, which he gave to the Society, was much more 

 meagre than that I had seen at his own rooms at West Point, or it has 

 suffered since its deposit. I believe it was the wish of Prof. Bailey 

 that the crude material should be distributed, and this indeed was 

 publicly announced. I myself, shortly after the announcement, made 

 application, and received about a dozen specimens of fossil earths, 

 and a few soundings, but in very small quantity, as was proper ; most 

 of which I now have. For a long time the collection was inaccessible, 

 during the period when the Society was about moving from its very 

 confined rooms in the Walker House, to the new and elegant building 

 now occupied. Just previous to this time, and perhaps just after, 

 there is reason to believe that the collection was very seriously de- 

 pleted ; not, however, by any fault or connivance of the officers, but 

 rather from perhaps too much confidence in allowing free access of 

 those who professed to be especially interested in the study of the Dia- 

 toinaceae. It is reasonable to suppose that Prof. Bailey left mounted 

 specimens (if not the material) illustrating the new genera and species 

 described by him, and especially those which had been engraved. 

 Besides these, I know he had a considerable collection, exchanges, 

 &c, from abroad." 



American Dredging Results. — A valuable paper, more zoological 

 than microscopical, on this subject appears in ' Silliman's Journal ' for 



