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HARDWICKE'S SCIEN CE -GO SSIP. 



NOTICES TO CORRESPONDENTS. 



To Correspondents.— It is necessary for us to request 

 some of our correspondents, who use this and the Exchange 

 column, to favour us with as clear and distinct handwriting 

 as possible. Many mistakes are constantly occurring, and 

 no end of trouble is given, by the hurried and careless pen- 

 manship of some of our correspondents. 



N. N. H. — The foci of the lenses in the Huyghe.nian eye- 

 piece are, as near as possible, the same as those in Ross's 

 C. ucular ; the aperture of the diaphragm is exactly fi of an 

 inch ; the eye lens is flush with the aperture on the cap. 



F. C. — The work you mention has no value as a Natural 

 History, except to those who like to trace the advances which 

 have been made in that science since the publication of your 

 book. You can obtain through a bookseller the information 

 you require respecting the book you name. 



C. W. Bingham. — The insect was an Ichneumon, but we 

 cannot, from the description sent, identify the species. 



Onkida. — The larger leaf is very curious : they are most 

 likely perforated by the larva of some insect, but what it is 

 impossible to say. 



J. H. Green. — Do not know of any other than Walker's: 

 why not go regularly in for this neglected order? The diffi- 

 culty of the technicalities soon disappears, and workers are 

 sadly wanted. 



E. G. Hebbkrt. — Your specimens from Keswick are the 

 seedlings of the Maiden-hair Spleenwort fern {Asplenium 

 trichomanes), 



Forkigw Beetles. — We cannot undertake to name foreign 

 beetles or other insects. 



Double Staising Vegetable Tissues. — In the last 

 paper by Dr. Beatty on this interesting subject, the following 

 errata occurred :— Page 98, "to absolute alcohol for ten 

 hours," should lead " two " hours; page 99, 2nd column, six 

 lines from top, for "rapidly" read "slowly"; page 

 100, should read "the blade is 7£in. long by l^in.wide." 

 Perhaps the magazines and journals which copied Dr. Beatty's 

 paper verbatim, without acknowledging its source, will 

 kindly note the above corrections. 



Dr. T.— The insect is the Great Saw-fly (Sirex gigas). See 

 " Half-Hours in the Green Lanes," page 201. 



J. B. Bradley. — Your specimens are Salvia verbenaca, 

 or " Clary " ; and Lotus corniculatus, or " Bird's-foot Trefoil." 

 Dr. W. J. D. — Please send us male and female specimens 

 of the "Tape-worm" for identification. Shall be glad of 

 any notes anent " Illumination." Send slides to 192, 

 Piccadilly. 



A Subscriber from the First.— Get Morris's " British 

 Birds." Yarrell's will soon be out, edited by Prof. Newton. 



W. Narracott and Others. — We do not undertake to 

 return rejected MSS. Part of W. N.'s communication ap- 

 peared two months ago. 



W. F. (Olney).— No. 1 is the Bur Marigold {Bidens cernua); 

 No. 2 is the Biting Persicaria (Polygonum Persicaria). 

 J. Butterworth. — Thanks for the slides. 

 T. B. L. — By all means procure Llewellyn Jewitt's " Half- 

 Hours with Antiquities," which will shortly be published at 

 192, Piccadilly. For details as to archaeology, churches, &c, 

 consult the "Dictionary of Terms of Art, &c," published as 

 one of Weale's series. 



G. R. Vive. — Your excellent slides of sections of Coal 

 Plants safely to hand. Accept our best thanks for them. 

 Article temporarily deferred for want of space. 



S. B., jun. — Cut your thistles down early in the year, 

 before they flower and seed. 



Mjddleton. — A correspondent from this place sends us 

 an exchange, but does not give his name. 



Dr. E. F. T. — The fungus was undoubtedly that causing 

 the dry-rot in wood. 



H. J. McGill.— Your specimen appears to be a variety of 

 Polygonum avicutare, but there was not enough of it to 

 decide from. 



W. James. — For instructions as to making sections of ccal, 

 see Science-Gossip for 1872, page 87.5 



W. James (Whitby). — The fungus on the leaf is Stegia 

 ilicis ; that on grasses Nos. 1 & 2 is Tricfiobasis rubigo-vera. 

 The specimens are too minute fragments to send for identi- 

 fication, especially when the fungi are so common that half 

 a dozen leaves might have been sent. 



R. D. (Newcastle-on-Tyne). — Your grass is a dwarfed 

 example of Kmleria cistatu, Pers. 



G. Horn. — No. 1 is Carex curttt, Good. ; No. 2, Car ex 

 dioica; No. 3, Caltha palustris : we never met with so small 

 a specimen of this species : it may probably arise from the 

 locality; No. 4, Sagina saxntilis (marked No. 1); No. 5, 

 Sagina nivalis, Lind. : the latter is a very great rarity, and 

 has been found by very few British botanists; we believe 

 Prof. Balfour was the first who detected it in Britain, only 

 about five years since. 



F. H. A. (Chichester). — Your specimen is, we believe, 

 Ranunculus trichophyllus, Chaix : in the absence of fruit, it 

 in difficult to form an opinion. R. diversifoliutt included what 

 we now credit as nearly a dozen distinct species. 



T. H. (Bridport).— Horseradish (Armoracia rusticana, L.). 



D. E. J. (St. David's).— The plants are: No. 1, a young 

 Sedum, too young to determine; No. 2, Wall Pepper (Sedum 

 acre, L.), a common though elegant species; No. 3, Sun 

 Spurge (.Euphorbia helioscopia, L.) ; No. 4, Male Fern 

 (Lustrea Filixmas). Our correspondent should always send 

 perfect specimens. _____ 



EXCHANGES. 

 Wanted in exchange for good Microscopic Slides, one or 

 two dried specimens of Hierochloe borealis (the Holy-grass) 

 for herbarium. Will send list of slides to select from. — G. 

 Garrett, Harland House, Wherstead-road, Ipswich. 



Duplicates. — H. nectus, E. Jacobaea, S. dispar, D. gono- 

 stigma, D. potatoria, U. sambucata, T. crepuscularia, P. 

 cytisaria, H. thyinaria, A. aversata, Ulmata, M. ocellata, 

 M. subtristata, C. silacettta, E. Cat. Desiderata:— Larvae, 

 Pupae, and Imagos.— W. K. Mann, Granby House, Clifton, 

 Bristol. 



Hypnum nitens in fruit, and other Mosses, in exchange 

 for Mosses. Plants, &x.— Robert Renton, Threeburnford, 

 Lauder, N.B. 



Rare British Plants, for Butterflies or the larger Moths. 



— L. R. H., 4, Ellesmere Villas, Devonshire-road, Forest Hill. 



Wanted. — Specimens of Glyphipteryx thrusonella, G. 



equitella, P. Paris, for Good Slides. — M. Fowler, 20 Burn-row, 



Slamannan, N.B. 



For prepared Scales of Rack Fish, send a stamped directed 

 envelope to W. H. Gomm, Somerton, Somerset. 



Duplicates. — Sibylla, Paphia, Adlppe, Artemis, Selene, 

 Lucina, Aegon, Alsus, Corydon, Tages, Alveolus, Galathea, 

 Phleas, and Jacobce (pupae). — R. J. Stent, 70, Queen-street, 

 Portsea, Hants. 



Mounted Sections of Fossil Vegetable Tissues from the 

 Lancashire coal-measures in exchange for good Mounted 

 Objects. — J. Butterworth, Goats Shaw, Oldham. 



Foreign Butterflies and Seeds from Peru, Madagascar, 

 and the West Indies, for Micro-slides or Useful Offers. — A.G., 

 18, Elgin-road, St. Peter's Park, London, W. 



Wanted, Rock Specimens (in quantity) from known lo- 

 calities. Good exchange given in British or Foreign Recent 

 Shells, Fossils, Minerals, Crustacea, &c. — Thos. D. Russell, 

 48, Essex-street, Strand, London, W.C. 



Wanted, slightly-injured Specimens of Exotic Lepidoptera 

 for microscope dissection. Will give in exchange Micro- 

 scope Slides. — W. A. Hyslop, 22,Palmerston-place,Edinburgh. 

 Black Rats (English), neatly preserved in the skins, for 

 Rare Birds' Skins or Mamma's' Skulls. — R. Morton Middle- 

 ton, jun., Fountain House, West Hartlepool. 



Aglaia, Atalanta, Artaxerxes, Alsus, Hectus, Velleda, 

 Humuli, Fuliginosa, Piniaria, Choerophyllata, Bucephala, 

 and Iota, for other Insects. — John Rae, Hanover-street, 

 Aberdeen. 



Pleistocene Shells from Erith and Crayford in exchange 

 for Tertiary Fossils, either English or foreign. — Robert 

 Nuttall, jun., 14, Westbourne-park-terrace, Harrow-road, 

 London. 



Hairs of Rat and Mouse and Pollen of Common Club- 

 moss in exchange for other Objects of Interest. — Jos. Laing, 

 126, West-street, Crewe. 



Wanted, Living Desmids in exchange for Mounted Speci- 

 mens which will retain their colour. Any genera except 

 Closterium. — Communicate with Charles Vance-Smith, Old 

 Chapel Parsonage, Dukinfield, near Manchester. 



Slides of Amphipleura pellacida in exchange for other 

 Well-mounted Test-slides. — W. J. Dickson, M.D., Canon- 

 bury, Falkland, Fiteshire. 



Duplicates of Irish Marine Algae, including Bryopsis 

 hypnoides, fruited Grffithisias, and other interesting Herba- 

 rium Specimens. Wanted, other Rarities, or first-class 

 Slides, or anything good. — T. McGann, Burren, co. Clare. 



Duplicates. — Edusa, Galathea, T. W. album, Cred. Jo, 

 Adonis, Corydon, Agrestis, Tages, H. cornua, and .4. Sonicere. 

 Desiderata. — Pupae of Maclmon, Imagos Crategi, Sinapis, 

 Blondina, Davus, Cinxia, and Egasoii, — Joseph Ovenden, 

 42, Temple-street, Strood, Kent. 



A few foreign Fern Fronds for other species. — Mr. Cox, 

 92, Denmark-street, Camberwell, S.E. 



Nos. 82, 132, 135, 140, 150, 163.. 259, 363, 578, 66S, 729, 893, 

 974, 1,043, 1,253, 1,257, 1,268, 1,296, Lon. Cat., 7th edit., 

 offered lor Nos. 2, 10, 45, 81, 92, 122. 123, 133, 253, 255, 261, 

 304,325, 334, 388, P96, 575, 577.— J. W. Pickering, the'Cottage, 

 Sparkbrook, Birmingham. 



Polygonum Raii, Sclerochloa foliacea, Triticum pungent, 

 &c, tor other species. — J. Harbord Lewis, 180, Mill-street, 

 Liverpool, S. 



Offhred. — Utricularia neglecta in flower for Utricularia 

 intermedia or Zanichellia polycarpa, either living or dry, or 

 living plants only of Myriophyllum verticillutum or Hippurus 

 vulgaris. — W. Curnon, Pembroke College, Newly Cliff, 

 Penzance. 



Offered.— 865, 576, 558, 829, 831, and others, in exchange 

 for Rare British Plants.— W. J. Hannan, 6, Tatton-street , 

 Ashton-under-Lyne. 



