256 



SCIENCE- G OS SIP. 



CORRESPONDENCE. 



We have pleasure in inviting any readers who desire to raise 

 discussions on scientific subjects, to address their letters to the 

 Editor, at 110 Strand, London, W.C Our only restriction will 

 be, in case the correspondence exceeds the bounds of courtesy ; 

 which we trust is a matter of great improbability. These 

 letters may be anonymous. In that case they must be accom- 

 panied by the full name and address of the writer, not for 

 publication, but as an earnest of good faith. The Editor does 

 not hold himself responsible for the opinions of the corre- 

 spondents. — Ed. S.-G. 



To the Editor of Science-Gossip. 



Sir, — You are probably aware that the Royal 

 Society has been engaged for some years past in 

 arranging for the publication of an International 

 Catalogue of Scientific Literature, to begin from 

 January 1st, 1901. 



Each science will be represented in an annual 

 volume containing lists, arranged under authors 

 and subjects, of all books and papers published 

 during the year ; these will be contributed through 

 official channels of information — abroad, by direct 

 control of the respective Governments — at home, 

 by means of the various Societies which devote 

 themselves to particular sciences ; those Societies 

 whose domains overlap having arranged for mutual 

 co-operation. 



The collection of title-slips for the United King- 

 dom of Great Britain and Ireland as regards 

 botany has been undertaken by the Council of the 

 Linnean Society, and they would appeal to all 

 botanic workers for support in their endeavour to 

 compile a complete record, by asking every 

 publishing body to send notices promptly of all 

 botanic issues to the undersigned. Societies are 

 requested to help by sending their issues as soon 

 as possible after publication, either by gift, loan, 

 or exchange, so as to co-operate in producing a 

 yearly record of botanic literature throughout the 

 world. 



Communications for this Catalogue should be 

 addressed to me as below. 



Trusting that I may rely upon your aid. 



B. Daydon Jackson, 

 Secretary. 



Linnean Society of London., 

 Burlington House, 



Piccadilly, Loudon. S.W., 



loth Beceniber 1900. 



NOTICES OF SOCIETIES. 



Ordinary meetings are marked f, excursions * ; names of persons 

 following excursions are of Conductors. Lantern Illustra- 

 tions §. 

 Hull Scientific and Field Naturalists' Clue. 

 Jan. 9.— t "Vegetable Galls." J. F. Robinson. 

 „ 23. — f" Notes on an Ornitholosical Tour in Norway." 

 E. W. Wade. 

 Manchester Museum, Owens College. 

 Jan. 5. — t " Defence and Defiance in Nature." W. E. Hoyle. 

 „ 12.— f " Volcanoes and Earthquakes." Prof. W. Boyd 



Dawkins. 

 „ 13.— f " The Fossil Mammals." Prof. W. Boyd Dawkins. 

 „ 19. — § " Economic Botany : (1 ) Sugar and its Sources." 



Professor Weiss. 

 „ 26.— §" Economic Botany: (2) Wheat and Sago." Prof. 

 Weiss. 

 South London Entomological and Natural History 



Society. 

 Jan. 10.— § " Photo-Micros of Lepidopterous Ova." F. Noad Clarke. 



„ 24.— Annual Meeting. 

 Selbobne Society. 



Jan. 3. — t " The Poetry of Science and Religion." Rev. E. S. 

 Lang Buckland. 



Birkbeck Natural History Society. 



Jan. 12. — * Zoological Gardens, Regent's Park. H. W. Unthank. 

 B.A., B.Sc. 

 „ 12. — f " The Reasoning Process in Man and the Lower 

 Animals." G. Armitage Smith, M.A. 



Preston Scientific Society. 



Jan. 9. — § " Some Recent Researches in Sun-spots." Rev. A. L. 



Cortie, S.J., F.R A.S. 

 „ 122. — § " The Cruise of the Defiance : a Photographic Holiday 



on a Canal Boat." Edgar Belliugham. 



NOTICES TO CORRESPONDENTS. 



Editorial Communications, articles, books for review, instru- 

 ments for notice, specimens for identification, &c, to be addressed 

 to John T. Carrington, 110 Strand, London, W.C. 



Business Communications. — All business communications 

 relating to Science-Gossip must be addressed to the Proprietors 

 of Science-Gossip, 110 Strand, London. 



NOTICE. 



Subscriptions (6s. 6d. per annum) may be paid 

 at any time. The postage of Science-Gossip is 

 really one penny, but only half that rate is charged 

 to subscribers. 



EXCHANGES. 



Notice. — Exchanges extending to thirty words (including 

 name and address) admitted free, but additional words must be 

 prepaid at the rate of threepence for every seven words or less. 



Wanted, Pleistocene Cave mammalian remains. Offered, 

 Teeth of Gomopholis (Hastings), Odontasis, etc. (Bracklesham), 

 Scales of Lepidotus (Hastings), and Middle Eocene Mollusca. — 

 G. White, 31 North Side, Clapham. S.W. 



Photographic Appliances wanted, J-plate lens R.R. or W.A. 

 Camera Body or Oil Laotern. Exchange Best Microscopic 

 Slides. — Thomas Brown, Rosemount, 80b Church Lane, Old 

 Charlton. 



Offered, Field or first power Opera Glasses, case and shoulder- 

 strap, or Books on Geology. Desiderata, Side Silver Reflector 

 Paraboloid, or other illuminating apparatus. — John J. Ward, 

 Lincoln Street, Coventry. 



Offered. — The new British Physa from Guidebridge, Lanes., 

 Vertigo moulinsiana, etc., and N. American L. and F.W. Shells. 

 Wanted, British Physa and foreign L. and F.W. Shells. — Fred. 

 Taylor, 42 Landseer Street, Oldham. 



" Literature " from the commencement (Vols. I. to V. inclu- 

 sive), in Parts as issued, offered in exchange for works on 

 Natural History, Conchological preferred.— M. V. Lebour, 

 Corbridge-on-Tvne. 



Quartz Crystals from Ceylon. Small, singly or in clusters, 

 large number on hand, excellent specimens. Will exchange for 

 crystals of other minerals. — Sergeant C. Barter, 2nd K.R.R., 

 Rawal Pindi, Punjab, India. 



Offered, singly and in clutches, Red-tailed, Red-shouldered 

 and American Rough-legged Buzzards. American Robins, Mock- 

 ing, King, Cat, and Cedar Birds, Red-winged and Meadow 

 Starlings, Hairy and Golden-winged Woodpeckers, etc., for 

 semi-common English eggs. — Thomas Raine, Chapel Allerton. 



CONTENTS. 



page 

 Photographic Wave Studies. By The Editor. Illus- 

 trated 225 



Spirals in Plants. By J. A. Wheldon 226 



Notes on Spinning Animals. By H. Wallis Kew. 



Illustrated 22K 



British Freshwater Mites. By C. F. George, M.R.C.S. 



Illustrated 230 



On the Naturh of Life. By F. J. Allen, M.A., M.D... 231 

 Geology in Hants Basin and Thames Valley. By 



J. P. Johnson 233 



An Introduction to British Spiders. By Frank 



Percy Smith. Illustrated 235 



Butterflies of the Palaearctic Region. By Henry 



Charles Lang, M.D. Illustrated 237 



Science Gossip-^Books to Read. Illustrated .. 239, 240 



Mathematics— Chemistry 242, 243 



Microscopy. Illustrated— Geology ..^ .. .. 244,249 

 Astronomy. Illustrated — Photography. Illustrated 250, 252 

 Notes and Queries— Correspondence .. .. 254,256 

 Notices — Exchanges . .. 256 



