i8 



HARDWJCKE'S SCIENCE-GOSSIP. 



catory of the use of neutral tint reflectors. I take it 

 the first requisite of a microscopical drawing is exact- 

 ness and truth. Beauty is a secondary thing. An 

 artist is generally the worst possible delineator of 

 microscopical objects. He wants to make a picture, 

 and sacrifices nature on the altar of art. May I add 

 that a thin cover makes as good a reflector as any 

 neutral tint, and costs nothing. The reflection is 

 quite vivid enough for anything in the way of outline 

 drawing, and the pencil is seen through it v.'ithout 

 difficulty. — Edwin Holmes. 



Studies in Microscopic Science. — Edited by 

 A. C. Cole, F.R.M.S.— We very much regret that in 

 the paragraph in our last issue on "A New Morpho- 

 logical Institution," we inadvertently over-stated the 

 relationships which existed between Mr. A. C. Cole 

 and Mr. J. E. Ady,''in the first volume of this admir- 

 able work, which was so well done, and so thoroughly 

 successful from all points, literary, scientific, and 

 artistic, that we deem it a great pity any difference of 

 opinion should exist among those who contributed to 

 so great a success. We inadvertently stated that 

 Mr. Ady was the actual and Mr. A. C. Cole the 

 nominal editor ; whereas the legal status of the re- 

 lationship was that i\Ir. Ady edited the " Studies," 

 under " the advice and direction" of Mr. Cole. Mr. 

 Cole's name appeared all through as editor, and 

 the weekly parts of the 2nd vol. now issuing, also 

 bear his name as editor. The preface to the 

 first volume states that all the articles except 

 three were written by Mr. J. E. Ady. This much, 

 however, appears certain, that to Mr. Cole belongs the 

 credit and honour of bringing out the "Studies." 

 The second volume is issuing its weekly parts in quite 

 as attractive a manner, and, as regards the coloured 

 plates, the drawings are very much improved, from an 

 artistic point of view, as we should expect from seeing 

 the initials of the same artist who is engaged on 

 our own coloured'plate. We have only space to notic 

 Nos. 7 and 8, dealing with Epithelium, and accom- 

 panied by a beautiful coloured plate showing the 

 various kinds ; squamous, from the tongue ; colum- 

 nar, from the intestine ; and ciliated, from the fauces. 

 No. 8 deals with the " Cell as an Individual," and is 

 illustrated by an exquisite coloured drawing of Micras- 

 terias denticulata, in different stages of cell develop- 

 ment. In addition to the above, we are pleased also 

 to call attention to No. III. of " Popular Micro- 

 scopical Studies," which treats upon the human scalp, 

 its hair follicles, glands, and tissues. This is accom- 

 panied by what we consider the best coloured plate 

 Mr. Cole has ever turned out. All the parts above 

 mentioned (including the latter) were accompanied by 

 beautifully mounted slides of the objects described, so 

 that the student is doubly benefited. 



Microscopy Sample Slides. — We have received 

 two of the slides prepared by Messrs. Ady & Ilensoldt, 



as advertised in our columns. One of them is a double 

 object, containing bothja longitudinal and a transverse 

 section of the compact tissue of the middle of shaft of 

 the human humerus, mounted in gum and Canada 

 balsam ; and the other a section of the Eozoonal 

 white Serpentine, recently discovered by Dr. Heddle 

 in Sutherlandshire. These specimens approach the 

 best style of mounting we have yet seen, and if 

 the new Morphological Laboratory continues to send 

 forth slides of this character it cannot fail soon to 

 command general attention. 



ZOOLOGY. 



Association of Helix nemoralis and H. 

 HORTENSis.— Having read Mr. Crowther's communi- 

 cation hereon, I have thought the following might be 

 of interest to him and others among your readers. 

 During 1882 I took //. nemoralis abundantly near 

 Stokesley, where it was associated with Iwrtensis, 

 which, however, was not so common. I also took a 

 single specimen of hyhrida. This summer I have 

 taken, at Redcar, var. roseo-labiata of Nemoralis (?) 

 These specimens (I took two) are smaller than^ 

 Nemoralis usually is at the place I mention and are 

 in fact more like Hortensis in size, though much 

 more solid than that species, which does not occur, 

 so far as my experience goes, within eight miles of 

 Redcar. In 1882 I turned out a canister load of 

 Hortensis, near ;.the place where the var. roseo-labiata 

 were found, with a view to colonisation, but soon 

 lost sight of them, and have not seen them since. I 

 must therefore query, are the shells I have taken 

 hybrids ? In September this year I found Nemoralis 

 and Hortensis living together near Durham, and at 

 once made a search far Hybrida, which search was 

 rewarded. Off" one bunch of nettles, about two yards 

 square, I took seven of the purply-brown shells 

 with the flesh-coloured lip, and both Nemorahs and 

 Hortensis were present. My experience with 

 Hybrida is that I have never found it apart from 

 Hortensis, and in all cases Nemoralis was also present. 

 For Mr. Gann's information, I may say that I have 

 raised in confinement from parents taken in copulation 

 broods of both Nemoralis and Hortensis, which I am 

 keeping with a view to experiments. I find that a 

 glass-covered box, moderately deep, and containing 

 a depth of soil of about five inches, which is planted 

 with nettles, plantain and coltsfoot, suits my prisoners 

 very well. I have some at present in confinement, 

 which were placed in the box in May 1882, and are 

 in possession of excellent health. I have raised a 

 fine lot of Limax maximiis in confinement this 

 year. — Baker Hudson. 



"Youth" Naturalists' Society.— This society 

 has just been formed with a view of promoting a 

 love of Natural History among the youths of the 



