96 



SCIENCE-GOSSIP. 



[Apeil 1,1800. 



NOTICES TO CORRESPONDENTS. 



All communications relative to advertisements, post-office 

 orders, and orders for the supply of this Journal should be 

 addressed to the Publisher. All contributions, books, 

 and pamphlets for the Editor should be sent to 192, 

 Piccadilly, London, W. To avoid disappointment, contri- 

 butions should not be received later than the 15th of each 

 month. No notice whatever can be taken of communi- 

 cations which do not contain the name and address of the 

 writer, not necessarily for publication, if desired to be with- 

 held. We do not undertake to answer any queries not 

 specially connected with Natural History, in accordance 

 with our acceptance of that term ; nor can we answer 

 queries which might be solved by the correspondent by an 

 appeal to any elementary book on the subject. We are 

 always prepared to accept queries of a critical nature, and 

 to publish the replies, provided some of our readers, besides 

 the querist, are likely to be interested in them. We 

 cannot undertake to return rejected manuscripts unless 

 sufficient stamps are enclosed to cover the return postage. 

 Neither can we promise to refer to or return any manu- 

 script after one month from the date of its receipt. All 

 microscopical drawings intended for publication should 

 have annexed thereto the powers employed, or the extent 

 of enlargement indicated in diameters (thus— X 320 

 diameters). Communications intended for publication 

 should be written on one side of the paper only, and all 

 scientific names, and names of places and individuals 

 should be as legible as possible. Wherever scientific names 

 or technicalities are employed, it is hoped that the common 

 names will accompanv them. Lists or tables are inad- 

 missible under any circumstances. Those of the popular 

 names of British plants and animals are retained and regis- 

 tered for publication when sufficiently complete for that 

 purpose, in whatever form may then be decided upon. 

 Address No. 192, Piccadii.lv, London, W. 



E. B.— For mounting hairs, see " Davies on Preparing and 

 Mounting," pp. 79 and 105. 



Triceratium.— E. A. C. will, with the exercise of much 

 patience and after frequent disappointment, find Trieerutium 

 favus in the Thames mud of the river at Limehouse.— 

 8. F. W. 



F. W. C— It is not likely to be ready for two months. 



F. A. — The moth enclosed is Dasychira pudibunda, — F. HI. 



Crystals from the Human Breath, see p. 264, vol. i. 



T. W. W.— Many instances of hermaphroditism in insects 

 are recorded in the " Journal of the Entomological Society," 

 and a special paper by Mr. Wing was published in their 

 " Transactions" a few years since.— F. M. 



C. S. B.— Have you tried the plan which you condemn ? 



W. F. Bogers is requested to furnish his address to C. B. 



Errata.— At page 66, col. 1, 1. 6, for "views" read 

 "wires;" line 19 for "views" read "results."— If. Hislop. 



M. should state more explicitly what he requires. 



F. W. C— Too old ; nothing is left but stains. 



J. W. (Manchester). — Your shells are— 1. Helieella nitidula 

 (young). 2. Planorbis imbricatits. 3. Pisidium sp.—R. T. 



J. F. C— It will evaporate unless completely hermetically 

 sealed. 2. The Geological Map of England and AVales in the 

 series published by the S. D. U. K. may be had of Stanford, 

 Charing Cross, London. 



J. M. H.— The three-spinedandten-spined sticklebacks are 

 both freshwater species; the fiftecn-spined is marine. See 

 Couch's "British Fishes," vol. i., pp. 167-184; also "Zoolo- 

 gist," p. 5,124. Yarrell's " British Fishes," vol. i., p. 99- 



R. A.— Loudon's " Encyclopedia of Plants," last edition, 

 1855, with two supplements, price 73s. 6d. We do not know 

 of a third supplement. Your lichen is Ramalina calicaris. 



Platino-cyanidi; of Magnesium. — There appears to have 

 been some mistake. Examination of the salt forwarded wil 

 be made, and the result recorded in our next. 



M. D. P.— If two different qualities of plaster are used, or 

 the same plaster after exposure to the air, the results will 

 differ. New and good plaster may have been used at one 

 time, and old or inferior at another. We do not imagine that 

 Mr. Lloyd is a likely person to mistake appearances in the 

 manner you suggest. 



C. F. Y. — Read the paragraph at p. 189 again, and you will 

 discover your mistake. E. T. Scott does not write of the 

 working part of a " microscope," but of a " diaphragm." 



W. L. — Your plants are— 1. Salvia verbenacea. 2. Lycoptts 

 Europa-KS. 3. Bartsia odontites. 



J. E. T. will find it better to purchase " dead black " paper 

 than attempt to make it. It is cheap enough, and may be had 

 of any respectable stationers. 



F, W. — Your moss is Phascum nitidum apparently, mixed 

 with P. mnticum. If you enclose directed envelope you may 

 receive the specimens separated. 



F. A. A. — We have received no communication from you 

 except your letter of the 20th, alluding to one. 



M.D.— (1.) The platino-cyanide of magnesium may be ob- 

 tained from Messrs. J. Robbins & Co., 3/2, Oxford Street, 

 at eight shillings per drachm, or one shilling for six grains 

 (the smallest quantity supplied) .—A. J. R. (2.) Cinchonidine, 

 we think, may be obtained of T. and H. Smith, manufacturing 

 chemists, Coleman-street, London, E.C.— A.J.R. (3.) The 

 injected microscopical preparations, to which we imagine you 

 allude, were shown at the International Exhibition of 1862. 

 The manufacturers were M. Burgogne Brothers, of Paris. 

 (4.) We believe that thin glass in sheets may be procured of 

 Claudet k Houghton, High Holborn, London. 



B. T. — Your moss is Sphagnum cymbifolivm, a very common 

 species. Zoophytes postponed for examination. 



Qi/ekett Microscopical Club.— The monthly meetings 

 will be held for the future (by permission of the Council) at 

 University College, Gower Street. 



G.L.L — A species of Echeveria, but not being a British 

 plant, and belonging to a group not very easily determined ; 

 we have been unable to identify the species in time. It is 

 allied to the stonecrops. 



EXCHANGES. 



Mounted Diatoms.— Twelve slides for an equal number 

 of entomological slides. B.Taylor, 57, Lowther Street, White- 

 haven. 



Silicified Wood from Tasmania. — J. W. Leakey, 3, 

 Prince of Wales's Avenue, Maiden Road, Haverstock Hill. 



Mosses.— J. A. Bowness ; also R. G., 42, William Street, 

 Ashton-under-Lyne. 



Land and Freshwater Shells.— List on application to 

 C. A., Grove House, Tottenham, London. 



Foreign Shells for English Shells, or Birds' Eggs.— 

 Beta, Post-office, South Shields. 



Diato.maceous Guano for other objects.— W. C, 62, Kirk- 

 gate, Leeds. 



Communications Received.— R. J. W.— W. H.— E. J. S. 

 C.-J. W. L.— W. II. C— B.-H. U.— H. J. W.— S. B.-P. S. 

 B.-J. M. H.-G. E. B.— F. A. A.— J. C. W.— W. K. B.-C. S. 

 B.— N. E. C— W. B. D.— C. B.— S. A. J — 2.— E. G. W.— 

 W. M.— C. A.— J. W.— T. XV. W.— J. F. C— A. W.-R. S. B. 

 — E. F. P.— W. W.— G. M.— M. P.— S. J. M.— J. S. T.— E. L. 

 r._W. T. I.— J. W. (Belgravia)— W. H. G.— R. A.— J. B.— 

 G. T. P.-S. C— W. B.— Fanny L. S.— F. A.— E. D. M— J. S. 

 C. D.-T. P. B.— J. S.-W. M.-C. F. W.-T. S. B.-W. L.— 

 R. M. M.-G. E. B.-J. L.-G. F. S.-F. W.-.T. E. T.-F. W 

 c ._j._W. C.-B. Q.-W. A. L.-T. A. C.-F. T. 



SphieruHeiibahuji.- Sent to C. A.— F.B.— J.B.— R.H.B 

 — W. C. (Leeds)— W. C. (Bromsgrove)— W. C. (Canonbury)— F. 

 W. C— J. H. D.— G. E— W. G.— M. J.-Dr.M.-C. T. N.— J. 

 J. R.— F. J.R.-M. R.— I). R.— Mrs. S.— A. S.-F. W.-E. W. 

 —J. H. W.— W. J. E- R. R. A.— G. G.— D. E. M.-G. E. Q. 

 — H. W.— Mr. B.-Miss D.— H. H. M.— W. E. R.— F. S.— 

 J. A.-J. B.-A. B.— B. B.-T. D. M.— J. H. S.-H. W.— 

 j. D . W.— H. S.-Br. W.— Capt. W. — E G. W.— W. W — 

 C. D. H.— J. A.— Mr. B.— J. C. M.— R. H, M.— J. R.— W. J. E. 



