I40 



SCIESCE-GOSSIP. 



on lettuce, they would pupate in the autumn and 

 produce a second brood. Mr. Sequeu-a stated that 

 part of a lot of silkwonns' eggs, laid in July, had 

 already hatched. Mr. Bate recorded a specimen 

 of Tethea suhlusa from Duhvich, August 26th last ; 

 he believed this species had not been taken in the 

 district before. Mr. Tutt said it had been taken 

 pre\-iously, but not commonly. — C. Nicholson and 

 L.J. Tremayne {Hon. Sees). 



North London Natural History SoctETi'. — 

 Thursday, July 23rd, i8g6. Mr. C. B. Smith, 

 President, in the chair. Exhibits : Mr. Han.'^ey, 

 Geometra papilionarsa, reared from Epping Forest 

 larva. Mr. Bishop mentioned that tihe bilberry 

 grows near Sevenoaks, which he thought was the 

 nearest locality to London for this plant. Mr. R. 

 W. Robbins said he had been more or less com- 

 missioned by the society, at the last meeting, to 

 find out the food-plant of Papilio machaon in the 

 Alps, Having spent a week at Lucerne, he had 

 found the wild carrot extremely plentiful at eleva- 

 tions as high as those whereon P. machaon occurred, 

 and had no doubt this plant was the food of 

 the larvae. Mr. F. W. Rudler, F.G.S., Curator 

 of the Museum of Practical Geology, Jermyn 

 Street, read a most interesting and instructive 

 paper entitled "The Age of Ice." Referring to 

 our fossil remadns, he said that in the MoUnsca, 

 most of the species still existed at the present day, 

 but the Mammals were nearly all either locally or 

 totally extinct. The appearance of many of these 

 was hairy and shaggv, suggestive of an age of 

 intense cold. Mr. Rudler then dealt at great 

 length with the discovery of traces of ice drifts in 

 Scotland and Wales, and mentioned the names of 

 Agassiz, Venetz, de Charpentier, Backland and 

 Ramsay in connection therewith. He then ex- 

 plained very fully the use of ice as an agency for 

 transport, and showed how bodies may be carried 

 along, either in, on, or under the ice. This led to 

 an explanation of many subjects, the whole 

 illustrated by a splendid series of diagrams. 

 The paper was admirably delivered throughout, 

 and lasted one hour forty-five minutes. A 

 hearty vote of thanks to Mr. Rudler terminated 

 the proceedings. — Laurence J . Tremayne, Hon. Sec. 



NOTICES TO CORRESPONDENTS. 



To CcRRESFOSDENTS AND E >; c HAV t-2 ? s — S t :s>; :e-C- ; 5 5 :? 

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 comimmications ;..- : i Tri- ' j= r:: .i:er tr.i- •.:.-; :::'- :; 

 the month for in=er:;:r. ii^ i^e :'; .i — L^i; z.^:i^Liz. ^."; ::r._ 

 mtmications can be inserted or noticed without foil name 

 and address of writer. Xotices of changes of address 

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Notice. — Contributors are requested to strictly observe the 

 following rules. AU contributions mtist be clearly written 

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The Editor will be pleased to answer questions and name 

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 species to be sent at one time, carriage paid. Duplicates 

 only to be sent, which will not be returned. The specimens 

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Au. editorial commnnications, books or instruments for 

 review, specimens for identification, etc., to be addressed to 

 John T. Caeeington, i, Northtunberland Avenue, London, 

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CORRESPONDENCE. 



DoKA Twopenny — Thanks for plums. Double specimens 

 are not very rare. The smaller is an interrupted double one, 

 one half not having matured. 



R. M. T:-: : ; ? 2 X ; ttingham). — ^We sympathise with yon on 

 the conap ir^: : ve.T .:rji ted nnmberof short notes on microscopy 

 in SciENcz-Gcsi;j. We always gladly welcome them. 

 We fear the interest in the subject has been latterly over- 

 shadowed by athletics, bicycling and the like. We know 

 of no other isonthiy ^o^mal which publishes them, and 

 the qnarterlie: = 't ; : : :. i" apart. If more were sent in by 

 those still wcrl-:: i ■ ;_ .ne microscope the interest would 

 soon revive. ; :- -ay, students now b^inning, need 



recent notes t; r, : : - r i ; r .hem. 



A. B. Jacks c;. .<- vr::ry). — ^Yes, the fnngi sent are the 

 edible champigBon, Mar^smius oreado, Fr., whit^ forms the 

 " lairy-ringis." 



EXCH.\KGE5. 



Notice. — ^Exchanges estaiding to thirty words Undoing 

 name and address) admitted free, but additional words must 



be prepaid at the rate of threepence for every seven words 

 or less. 



Plbistocese mollusc* for exchange ; desiderata, British 

 and European shells. — .\. S. Kennard, Benenden, Mackenzie 

 Road, Beckenbam, Kent. 



Wanted, oSTers for Beck's Popular Binocular Microscope, 

 2-iiL, i-in , j in , |-in. objectives, etc., cost £ig ; would accept 

 in part J p&te camera outfit. — 1. Read, St. Stephen's Street, 

 Norwich. 



Wanted, No. 14 " Naturalist's JoumaL" — Mosley, printer, 

 Huddersfield. 



Wanted, Science-Gossip for November, 1S6S, September 

 to December, 1S93. and September, itSSg; any reasonable 

 price given. Also wanted, specimens exhibiting mimicry in 

 Lepidoptera, Orthopiera, etc ; full pardculars for cash or 

 exchange. — Mark Sykes, Manor Street, Ardwick, Man- 

 chester. 



BuTTEBFUES exchanged for moths, Sibylla. Galathea. 

 Adonis, Corydon, Alsus, Act^eon. — F. Brown, Van Buren, 

 B oumemouth. 



Wanted, cabinet specimens of sea-urchins and star-fish, 

 also a wasps' nest, in exchange for first-class micro-slides 

 and good healthy canaries.— H. W. Parritt, 8, Whitehall 

 Park, London, N. 



Veetigo suestbiat.i, V. edentnla, Zonites excavatus, Z. 

 r.'.tidns, Acmea lineaia and others for Unios and Anodontas 

 from any rivers or ponds in Norfolk. — Joseph Wbitwham, S2, 

 Cross Lane, Marsh, Huddersfield 



For exchange, a few dozen micro-photo negatives. 

 Wanted, mounted Diatoms and Foraminifera. — John Meams, 

 52, Jasmine Terrace, Aberdeen. 



Wanted, specimen of paste containing live eels {.Angnii- 

 lulae) in exchange for micro-slides; also for exchange, 

 Fiddian's portable microscope lamp and Casella's altazi- 

 muth. Wanted, safety stage. — H. G. Madan, Bearland, 

 Glouc^ter. 



Fossn. diatomaceous earth of Oamam, New Zealand, for 

 a similar weight of any other earth of similar character. — 

 R. Trist SeareU, Professor of Music, Christchurch, N.Z. 



Wasted, Chemical balance (| milligram), chemical 

 apparatns, blowpipe apparatus, and rock specimens and 

 slides. State desiderata— J. Russon, 123, Monk's Road, 

 Lincoln. 



Mosses. — Wanted, Sphagnums, Bryums, and any Dicra- 

 naceae, Grimmiaceae. Offered, Hypnnm imponens, Ephe- 

 memm minutissimnm ; Fruiting specimens : Aulacomnioa 

 palustre, Hypnnm purnm. Hylocomimn sqoarrosam, 

 Eurynchium piliCemm. — H. Monington, 8, Westwood, Road, 

 Screatham. 



