24 



HA R D WICKE 'S S CIENCE - G O SSIF. 



NOTICES TO CORRESPONDENTS. 



To Subscribers.- — The compilation of the classified index 

 of the last twelve volumes of Science-Gossip has proved a 

 more difficult and painstaking task than we at first imagined. 

 It is now in a forward state of preparation, and we crave a 

 little grace from our numerous correspondents, who have 

 already applied for it. 



To Correspondents and Exchangers. — As we now 

 publish Science-Gossip at least a week earlier than hereto- 

 fore, we cannot possibly insert in the following number any 

 communications which reach us later than the 8th of the 

 previous month. 



A Subscriber. — You will find Jardine's " Naturalist's 

 Library " one of the best systematic works on Natural History 

 yet published, and all the more advantageous to the student in 

 that he can obtain any work bearing on his own particular study. 



S. C. Adams. — Obtain Prof Harvey's three volumes of 

 " Phycologia Britannica." This has e.Kcellent coloured plates, 

 and gives the geographical distribution and varieties of the 

 chief species of sea-weed. Mr. W. H. Grattann's excellent and 

 cheap little book on British Sea-weeds will also help you. 

 These plants have a very extensive geographical distribution, 

 as all lowly-organized forms usually have. 



F. J. Greenfield. — It is no uncommon thing for flowers to 

 change colour when plucked. Many do so after pollination ; 

 those of the hawthorn, to wit, whose petals usually assume a 

 pinkish tinge when fading. The cause is due to a chemical 

 change in the colouring matter of the cells of the petals. 



S. C. M.— The pods are those of Iris fcctidissima, with the 

 capsules open, showing the bright red seeds within. 



John Roper. — The fossils are : i. Ammonites lautus; and 

 2. a coral ( Trochocyathus^. 



Miss R. R.— Dr. Lankester's " Half-hours with the Micro- 

 scope," especially the new edition, which is considerably en- 

 larged, would answer your purpose fully. 



T. O. (Sale). — The plants are: i. Drosera roticndifolia ; 

 2. Finguicula vulgaris ; 3. Habenaria viridis ; and 4. 

 Narthcciwn ossifragtnn. 



J. Battersby.— Prof. Nicholson's "Advanced Text-Book 

 of Zoology," price 6s., published by Blackwood & Sons, is the 

 best you could get. 



R. Greenwood. — The mineral was iron, not copper, pyrites 

 (iron sulphite). It may be told from copper by its superior 

 hardness. A knife will scratch copper pyrites, but will not 

 touch iron pyrites. 



J. J. (Burton.) — Get Cooke's " Microscopic Fungi," pub- 

 lished by Hardwicke & Bogue, 192, Piccadilly. 



R. M. Christy. — We are sorry to say that, owing to the 

 loose way in which it had been packed, your slug came to us 

 amid a mass of hardened silvery slime, representing a fossil 

 stocking-needle. Next time send one inclosed in oil-silk, to 

 protect it from the air. 



J. J. M.— The "jelly" was a species of Nostoc, showing the 

 bead-like connection of cells. 



E. Grove. — The depredators are either mole-crickets or the 

 large species of ear-wig. 



A. R. C— The only book we know is Page's " Handbook of 

 Geology and Physical Geography," published by Blackwood 

 & Sons. 



Miss T.— Mrs. Lankester's " British Wild Flowers worth 

 Notice " has coloured plates of the commoner species, and it is 

 the cheapest we know of. 



W. Thompson. — You will find all the monstrosities relating 

 to the different parts and organs of plants fully treated of in 

 Dr. Master's " Vegetable Teratology," published by the Ray 

 Society, at, we believe, one guinea. 



Acolyte.— Consult Baily's "Characteristic British Fossils," 

 for the Primary rocks ; and Prof. Nicholson's " Manual of 

 Palaeontology" for the rest. 



Thos. Palmer. —Your shells are : i. Nasoa reticulata ; 

 2. Dentalium entale ; 3. Cyprea Eiiropo'a ; and 4. Tellina 

 Bait hie a. 



W. Hambrough.-— The leaves of the water-cress sent us are 

 not unusually found in the state you observed, especially when 

 the growth of the plant has been unusually rapid. 



EXCHANGES. 



Plants from United States of America and Canada, to 

 exchange for British plants ; English and other European 

 Ferns particularly desired. Only well-preserved specimens 

 wanted and given in the exchange.— Lyman H. Hoysrad, 

 Pine Plains, Dutchess Co., New York, U.S.A. 



First 6 vols, of Science-Gossip, bound in two, for micro 

 slides, &c., &c.— J. S. Harrison, 48, Lowgate, Hull. 



A FEW specimens of Synapta and Chirodota violacca, or 

 other good micro material wanted in exchange for well- mounted 

 objects, &c.— W. L. S., 6, Dagnall Park Terrace, Selhurst, S.E. 



For Seeds of Collomia (spiral fibres), .send stamped and 

 directed envelope to F. Coles, 248, King's-road, Chelsea, S.W. 



Wanted, rubbing of IMonumental Brasses, for Seaweeds, 

 Ferns, or bound volumes of Science-Gossip.— F. Stanley, 6, 

 Clifton Gardens, Margate. 



Wants to exchange Limtiea stagnalis, Unio tianidus, 

 Uttio pictonim, Anodonta cygnea, Anatina, or Helix arbus- 

 torjim, or any other common or rare shells from Yorkshire, for 

 any other as good from any county in England. — J. Whitenham, 

 Cross-lane Marsh, Huddersfield. 



" Berkley's Cryptogamic Botany," quite new, uncut, cost 

 one guinea, offered in exchange for Gosse's "Anemones," 

 " Devonshire Coast," "Tenby," "Marine Zoology," or other 

 good work on Natural History, or a Kelner Eye-piece, large 

 Bullseye Condenser, or other microscopic apparatus. — C. A. 

 Grimes, 8, Crafford-street, Dover. 



For specimens of P/^Wrtr/rt cristata, Laoinedia genicnlata, 

 and Lepralia hyalina, send stamped envelope or object of 

 interest to T. Comlidge, 5, Norfolk-street, Brighton. 



Nos. 24, 34, 40, 58, 67, 81, 100, 125, 133, 136, 146, 235, 276, 

 273, 282, 2S7, 305, 273, &c., 7th Edition London Cat., for other 

 flowers, plants, or mosses. Lists to W. E. Green, 24, Triangle, 

 Bristol. 



Igneous Rocks wanted in quantity from known localities ; 

 liberal exchange in Shells, Fossils, Crustacea, Minerals, or 

 Microscopic Objects,— Thomas D. Russell, 48, Essex-street, 

 London, W.C. 



Slide of Fossil Fibrous Wood (from Shropshire clay, iron- 

 stone), in exchange for other good slide or material. Un- 

 mounted Marine AlgiB wanted. — J. P., 63, Legh-street, 

 Warrington. 



Portion of wing of Morpho, showing scales in situ, Opaque 

 Slide, Fijian Tapa Cloth, balsam mounted for polariscope, in 

 exchange for first-class Slides. — J. W. S., 7, Charlemont- 

 terrace, Cork. 



Five hundred Slabs of Polished Madrepores ; will ex- 

 change for Gault Fossils, Silurian Corals and Fossils, one 

 good polished-slab for each Gault, or good Specimen of Trilo- 

 bite ; will exchange also for good Foreign Shells. Some few 

 British Shells also required.— A. J. R. Sclater, 9, Bank-street, 

 Teignmouth, Devonshire. 



Artemesia campestris (hinn.) or OrobancJie caryopkyllncea 

 (Sm.), for Nos. 23, loi, 106, 156, 535, 536, 544, 545, 546, 674, 



851, 913, 950, 971, 1,020, 1,089, IJI2I, 1,133, I>220, 1,247, 1.279, 



1,312. 1.329. 1.343. 1,484. i,6i8, 1,622, 1,624, 1,632, 7th ed. 

 " Lon. Cat." — A. B., 107, High-street, Croydon. 



I should be glad to hear of some one with whom to ex- 

 change,a few British Land and Fresh-water Shells. — Robt. M. 

 Christy, 20, Bootham, York. 



HALF-an-ounce of Upper Peruvian Guano, containing an 

 abundance of Aulacodiscus scaber, with a number of other 

 good forms, A. Coinbesi, &c., &c., in exchange for the same of 

 Monterey Stone or Earth. Alss a number of duplicate Diatom 

 Slides in exchange.— Address, Mr. Powell, 327, Camden-rd., N. 



Micro Material, consisting of Sections, Zoophytes, Leaves, 

 &c., in exchange for other objects. — H. Livesej', 6, Upper 

 Phillimore-gardens, Kensington, London, W. 



Vol. I. of Cassell's "Popular Natural History," unbound, 

 for Pupae (living) of Atropos, &c. — C. Swatman, Mr. Feld- 

 wick's, London-road, Sevenoaks. 



In exchange for other mounted Natural History Objects : 

 Proboscis of Blow-fly, Atnphipleura pellucida, Navictim. 

 rhomboides, Pleurosigma angulatmn, Pleurosigina fasciola, 

 Podura Scales. —Address, T. C. Maggs, Yeovil. 



Fossils, from Somerset and Dorset Oolite, for Silurian from 

 Dudley and Ludlow. — J. Purdue Ridgeway, Plympton, Devon. 



Lintncra glabra, Ancylus Jluviatilis (var. nlbida), A. 

 lacustris, Zonites radiatulus, nitidus, and excavatus. Helix 

 fusca. Helix caperata (var. alba), C. rugosa (var. dubia), &c., 

 offered for good British Marine or Foreign Shells ; or would 

 exchange for British Land and Fresh-water Shells with collectors 

 in other countries. — Lister Pearce, Hebble-terrace, Bradford- 

 road, Huddersfield, Yorks. 



BOOKS, &c., RECEIVED. 



" The Geology of England and Wales." By H. B. Wood- 

 ward, F.G.S. London : Longmans & Co. 



" Cross and Self-fertilization of Plants." By C. Darwin, 

 F.R.S. London: John Murray. 



" The Smoker's Guide." London : Hardwicke & Bogue. 



" Transactions of the Literary and Philosophical Society of 

 Liverpool." Vol. xxx. 



"The Yorkshire Naturalist." December. 



" The American Naturalist." November. 



" Botanische Zeitung." November. 



" Les Mondes," November. 



" Land and Water." December. 



" Monthly Microscopical Journal." December. 



" British Journal of Photography." 



