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IIARUWICKE'S SCIENCE-GOSSIP. 



NOTICES TO CORRESPONDENTS. 



All communications relative to advertisements, post-office 

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

 addressed to tiie PirBLtsitKii. All contributions, books, 

 and pamiihlets 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. A'o noti'.c ivh'iterer run he tiiken of cotnmunicii- 

 tiiins which do nut ciintnin the iiiiine and nddre>is of the 

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

 leld. We do lint undertake to answer any queries not 

 s-pecially 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 

 r.ppeal to any elementary book on the subject. 



Ghegory. — It is not our custom to particularize any indi- 

 vidual dealer or tradesman to the disadvantage of the rest. 



E. I. — Our experience of Gum Dammar leads us to give the 

 ])relerence to Canada balsam !or mountinp; DiatomaceK ; 

 we find that the striae are less easily resolved when the gum 

 is used ; for vegetable and insect preparations it answers 

 very well, but is not more easily manipulated than Canada 

 balsam. 



J. M. W. — The small black spots on the raw American cot- 

 ton are the spore-cases of CAtp^owM/m, a genus of microscopic 

 fun2:i. See page 1/5 of Cooke's " Microscopic Fungi" (Hard- 

 wicke, London) for further detailed account. 



I.TossKS. — 1. Hi/pnum serpens ; 2. Homaliatrichomanoides; 

 3. Aiiomodon viticulosus ; 4. Leucubvyum glaucuni, — li. B. 



A Ne*v Slbscriber. — The supposed new species of beetle 

 is a common weevil {Otiorhj/nrhiis siilcnfn.i. Fab.), a species 

 well known to make havoc among all kinds of plants. We 

 would suggest to our correspondent that beetles do not grow 

 in the perfect state, and that the e////r« are not "pseudo- 

 wins-cases." See SciKXCE-Gossip, vol. for 1870. 



R. H. I..— Your query had been mislaid. The parcel sent 

 contained a moss, a species of Hppninn. which is very sensi- 

 tive to moisture. It is common at the base of old trees. 



G. n. — The egg-cases and eggs are those of the common 

 Dog-fish, which may be distinguished from those of the Skate 

 by the longer tendrils of the four ends. 



E. M. P. — The specimen sent is Clur/tonin. perfoliutii, an 

 American plant which has domesticated itselfiuthis country. 

 It is fometimes eaten as a salad. 



T. \V. — We cannot undertake to name specimens of the 

 nature of those sent. They were the midribs of the fronds 

 of some Rhodosperm sea-weeds. That is all we know. 



H. B. T. — We know of no other plan for preparing chalk 

 for microscopic examination than that usually adopted ; viz., 

 rubbing the lump of chalk down with a toothbrush in a cup 

 of water, and when a sufficient quantity is obtained, pouring 

 it into a test-tube or a two-ounce phial, and shaking it well, 

 and decanting all that does not subside in the course of two 

 minutes, tepeatuig the process as long as the water continues 

 cloudy. The deposit remaining in the test-tube may then be 

 b ilcd in some liquor potassae and again well washed. If the 

 chalk is hard and does not readily yield to the brush, a lump 

 of it may be boiled in a weak solution of glauoer salt and then 

 caicfiiUv waslied. The oriranisms in the chalk generally re- 

 quire to be mounted in Canada baham. 



EXCHANGES. 



Notice.— Only one " Exchange '' can be inserted at a time 

 by the same individual. The maximum length (except for 

 correspondents not residing in Great Britain) is three lines. 

 Only objects of Natural Hi>tory permitted. Notices must be 

 Ugibly written, in full, as intended to be inserted. 



Leaf of Oiiosma tnurirum with peculiar stellate hairs 

 (mounted!, in exchange for other well-mounted objects.— 

 J. Sargent, Jun., Fritchley, near Derby. 



Section of Porcupine's Quill (mounted), for any good 

 microscopic object well mounted and of interest.— J. M. 

 lloare. The Hill, Ilampstead. 



Caudicum Norvk(;iu,-\i, Prctimculus f^Ii/chimris, Stc, for 

 other British marine shells.— A. W. Langdoii, Llanrwst 

 House, Hastings. 



A liberal allowance in Diatoms (selected and arranged in 

 groups), for Ilyulonema mirn/iitis, Wheel-plates of Chirodota, 

 or Anchors of Synapfa.— G. Moore, Dereham Road, Norwich. 



EoGS of the Puss Moth in exchange for others.— G. A. 

 Bi.kenhead, Post-office, Sale, near Manchester. 



Griphites, Rhynconella, and Corals, in exchange for 

 other fossils. — H. Richards, 10, Ellingboro' Crescent, Weston- 

 super-Mare. 



For Reproductive Organs of Moss (Bryum hornum). senl 

 stamped directed envelope to J. H. Martin, 86, Week Street, 

 Maidstone. 



Carefully mounted slides of Glnnrn Erde, or cuttle-fi^li 

 shell, for polariscope, offered for mounted palates of mollusks 

 or other slides.— A. B. C, Belmont, Dartmouth. 



A FEW British Birds' Skins and Sternums of Eagle Owl, 

 Long-earod do.. Goshawk, Glaucous Gull, and Lesser B'.ack- 

 backed Gull, for birds' eggs, or Lepidoptera in any stage. — 

 S- L- Mosley, Almoiidbury Bank, Huddersfield. 



Spicules from Doris tnherculata mounted, for other 

 mounted objects. — John C. Hutclieson, 8, Lausdowne Cres- 

 cent, Glasgow. 



W'an'tkd, Animal Parasites (mounted), correctly named. 

 Entomological slides offered in exchange. — Address, E. 

 Lovett, Holly Mount, Croydon. 



Lepism.a. saccharina. — Send stimped envelope. — S. C. 

 Hincks, Runfold Lodge, Farnham, Surrey. 



MouNTKu Microscopic objects in exchange for other 

 mounted objects. — T. W. Cowan, Horsham. 



S.MALL, but fair, specimens of Parn'isxia palustris, Sili- 

 fhnrpia eiiropeea, Htimeni>pltyllum Tunbridgt:)iSP, Sec, for 

 other of the rarer British plants.— Mrs. A. Allen, Barcombe 

 Rectory, Lewes. 



Microscopic objects (mounted) in exchange for otiier ob 

 jects.— T. W. Cowan, Korsham. 



SiPTixGS of Sponge Sand, for object and stamped en- 

 velope.— H. R. Warrington, 9, St. George's Terrace, Baras- 

 bury. 



Wa-vted, Fish Remains from the Coal Measures, for Wen- 

 lock and Woolhope Brachinpnda. — Apply, sending lists, to the 

 Rev. W. H. Painter, 2, Belgrave Street, Derby. 



Roots of Ophioglo^sum for roots of Botrychiiim Lunnriti. 

 — Miss Ida Rawlins, Gwastad Hall, Wiexham, North Wales. 



Three single-lined Gorgonias, attached to valve of Tflliim, 

 for three inches of Glass-rope sponge. — R. J. Nelson, Stokej 

 Devonport. 



Eggs of Water and Land Birds offered for larva: or eggs of 

 E. VfrsicoUira. — Mrs. Battersby, Cromlyn, Rathowen, We.st 

 Meath, Ireland. 



Larv.'e and Pupre of B. Querots and Caja, eggs of.?. Fnpidi, 

 for larva.' or pupaj of Villica, C. Dotitinula, kc.—R. Gailit, 

 Market Square, Alford, Lincolnshire. 



yEciDiu.M Ari offered ill exchange for equally rare fungi, 

 good botanical or po'ariscope objects.— Henry Pocklington, 

 12, Margaret Street, Hull. 



BOOKS RECEIVED. 



" Corals and Coral Islands." By James D. Dana, LL.D., 

 Professor of Geology and M'lieralogy in Yale College, &c. 

 London ; Sampson Low & Co. 1872. 



" Botany for Beginners." By Maxwell T. Masters, M-D-, 

 F.R.S. London: Bradbury, Evans, i*v Co. 1872. 



" May Flowers." By the Rev. James Harris, M. A., Head 

 Master of Cathedral Grammar School, Cliester. Loudon : 

 Griffith & Farran. 1872. 



" The Journal of Botany." May. 



"The Canadian Naturalist and Quarterly Journal of 

 Science." No. 3. 



" The American Naturalist." No. 4. 



"The Canadian Entomologist." No. 4, April. 



"The Lens." Part II. 



" Report of Geological Survey of Ohio." 1870. 



" Fourth Annual Report of Noxious, Beneficial, and other 

 Insects of the State of f.lissouri." 



" Fruit Trees," from the French of Du Breuil. London 

 Lockwood Si Co. 



COM.MUN'ICATION'S Rkckivkd.— A. C. 11.— F. K.— G. M. — 

 C. R.— A. W. L.— J. S.— J. H.— H. R.— H.B. S.— Z. E. G.— 

 II. E. W.— T. S.-R. J. K.— G. A. B.— C. J.— W. A.- J. C. H. 

 — C. G. IS.— A. H.— W. H. B.— F. K.-J. H.— R. L.-R. H.— 

 R. W.-H. E. B.— J. S.— F. B. B.— C. L. W.-R. H. A.— 

 W. S. G.— E. W.— R. H. A.-R. G.— 11. P.— H. E. F.— H. B. 

 T.-J. S.— iM. A. D.-A. P. J.— C. A. R.— C. C. A.— J. H. C. 

 —J. T.— J. R. D.-J. A.-L. T.— J. R. S. C— W. E.- H. F. P. 

 — C. S.— G. H. H.-C. J. W. R.— J. G.— W. K.— A. G. G.— 

 J. B.— G. O. H.— S. B.-W. H. P. -J. Le B.-W. B.— J. G.— 

 C. R. E.-C. L.— J. F.— J. A. P.-T. B. B.— A. B. C.-G. F.— 

 H. A. A.— H. B.— J. W. W.— P. P.— J. B. B.-W. H. P.— G. 

 E. R.-C. L.-E. C— W. H. W.— G.-B. W. F. 



