Ixxxii 



NATURE 



{jfan. 1 6, 1879 



MICROSCOPIC OBJECTS 



Of •uperlative perfection, illustrating Histology and every branch of Micro- 

 scopy. Catalogue post free and gratis on application. 



PARIS UNIVERSAL EXHIBITION, 1878. 



Prize Ahdal awarded for Excellence, Variety, &^c. 

 EDMUND WHEELER, 48N,Tonineton Road, Holloway, London, N. 



SUNDAY LECTURE SOCIETY.— LEC- 



TURES at ST. GEORGE'S HALL, Langham Place, each SUNDAY 

 AFTERNOON, commencing at Four o'clock precisely. Sunday, 

 January 19.— T. W. Rhys Davids, Esq., on " Is Life Worth Having? 

 and the Eternal Hope: an Answer from Buddha's First Sermon to some 

 Questions of To-day. "—Members' Annual Subscription, £1. Payment 

 at the Door— One Penny, Sixpence, and (reserved seats) One Shilling. 



PRELIMINARY SCIENTIFIC EXAMINATION. 



UNIVERSITY OF LONDON. 



A Class in all the subjects for this Examination is held at St. Bartholo 

 mew's Hospital and College from January to July, commencing on 

 January 20. 

 Botany.— Rev. G. Henslow, M.A. (Christ's CoL, Camb.), Lecturer on 



Botany to the Hospital. 

 Physics.— D. McAlister, B.A.,B.Sc., (Lond.) (Fellow of St. John's Col., 



Camb.), Demonstrator of Natural Philosophy to the Hospital. 

 Zoology.— Norman Moore, M.D. (St Cath. Col., Camb.), Lecturer on 



Comparative Anatomy to the Hospital. 

 Chemistry.— H. E. Armstrong, Ph.D., F.R.S., Demonstrator of Chemistry 



to the Hospital. 

 "The Class is open to others than Students of the Hospital. Fee for the 

 entire Course (including practical instruction and materials)^— To Students 

 of the Hospital, £8 8s. ; to others, ;£io lof. 



For particulars, application may be made personally or by letter to the 

 Warden of the College, St. Bartholomew's Hospital, E C. 



MATRICULATION.— LONDON 

 UNIVERSITY. 



Six months' Course. Tee, £io jos. 



1ST BACHELOR OF SCIENCE and PRELIMINARY SCIENTIFIC 

 M.B. Six months' Course. Fee, ;{^io los. 



The above Classes will commence at the Royal Polytechnic, Regent 

 Street, in January next, under the direction of Edward B. Aveling. D.Sc, 

 F.L.S. All work practical. 



LIBRARY OF HARVARD UNIVERSITY, 

 CAMBRIDGE, MASS., U.S.A. 



Packages for the General Library, or for any of the Departmental 

 Libraries (A'^tronomical Observatory, Botanic Garden, Bussey Institution, 

 Divinity School, Law School, Museum of Comparative Zoology, Scientific 

 School), may be sent to the Agents, Messrs. TkCbner & Co., 57 and 59, 

 Ludgate Hill, London. 



JUSTIN WINSOR, Librarian. 



BERNERS COLLEGE.— The Laboratory 



and Class Rooms are open for Private and Class Study, morning and 

 evening. ANALYSES performed. Especial arrangements for Gentle- 

 men and Ladies prepanng for the various Examining Boards. Fees 

 moderate. — Apply to Prof. Gardner, at Bemers College, 44, Berners 

 Street. W 



AN EXPERIENCED SCIENCE LEC- 



TURER has some time disengaged. His pupils have repeatedly taken 

 the first place at the Military and other Examinations. — Address F.G.S., 

 No. I, Brunswick Villas, Woolwich. 



FOR SALE, a VALUABLE COLLECTION 



of Falkland Island Hawks, Buzzards, &c. ; also a King Penguin, Tierra 

 del !■ uegian Horned Owl, King Shags and Petrels, set up by Gardner, 

 371, Oxford Street. — Address Rev. H. C. L., care of Mrs. Hunt, 

 Newborough, Wimbome. 



EVERETT'S SHORTHAND.— The Sys- 



tem of Shorthand recently published by Prof. Everett was laid before 

 the three London Shorthand Societies at a united meeting on January 2, 

 and was very favourably received, several speakers expressing their 

 opinion that it was the best system for a beginner to take up. It was 

 afterwards subjected to some severe tests for precision in the expe- 

 ditious writing and difficult passages, and passed them in a manner that 

 gave complete satisfaction. 

 " Everett's Shorthand," price ^s. 6d., is published by Marcus Ward & 

 Co., 67 and 68, Chandcs Street, London, W.C. 



MICROSCOPE.— SMITH & BECK'S No. i 



large BINOCULAR MICROSCOPE, with coarse and fine adjustments 

 for focussing, mechanical stage with rotating movement, having rect- 

 angular motion, mechanical sub-stage for holding and adjusting illumin- 

 ating and polarising apparatus, diaphragm plate, plain and concave 

 mirrors, and Wenham's binocular arrangement ; double-jointed mirror ; 

 a separate tube for using as a monccular instrument ; large condensing 

 lens on stand ; five eye-pieces ; achromatic condenser ; complete polar- 

 ising apparatus; side condenser; Lister's dark wells and holder; 

 double nose-piece ; camera lucida ; live-box ; glass trough ; two glass 

 plates with ledge ; stage forceps ; large forceps ; erecting glass ; luber- 

 kuhn ; 1-8, i 5, 4-10, 2-3, it achromatic object-glasses ; 107 objects ; all 

 packed in mahogany case complete. May be seen between 10 and 12 

 A.M., at 17, Store Street, Bedford Square, W.C. 



LIVING SPECIMENS FOR THE MICROSCOPE.! 



THOMAS BOLTON, MICROSCOPIST'S and NATURALIST'S 

 STUDIO, 17, ANN STREET BIRMINGHAM. 

 RAPHIDIOPHRYS PALLIDA, 



The Freshwater Rhixopoda of F. Schulie figured in Archiv /Ur 

 mikroskop. Anatomic, vol. x. Plate xxvi. fig. i. 



An interesting marine organism which Prof. E. Ray Lankester has recog 

 nised as an embryo of the Polyzoa, Alcyonidittm. 



Also Floscules, some fine Melicerta ringers, and Vohox globator, &c 

 Price List of Specimens on Application, with Stamped Addres.sed Envelope. 



Weekly Amiouncemenu will be made in this place of Organisms ready I 

 for sale. . 



ELECTRICAL & SCIENTIFIC APPARA^ I 



TUS for AMATEURS and the TRADE.— Microphones of every form, I 

 from IS. 6d. New cheap Electric Lamps and Batteries. Induction I 

 Coils and Frictional Machines are specialties. Electrical Bells, Fire 

 and Thief Alarms, and Automatic Switch-boards. Magnets, Covered 

 Wires, Screws, and all Materials. Apparatus for Science Teac'iers. 

 Illustrated Catalogue, one stamp. Repairs and Alterations. Appara- ; 

 tus made to sketch.— DALE & CRAMPTON, Manufacturing Elec- : 

 tricians, 4, Little Britain, E.G. 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best quality. Circles, 3^. dd. per ounce ; Squares, 

 2j. gd. ; post free 2d. extra ; Ground-edged Slips, 5^. per gross ; also 

 other Mounting Materials and Objects prepared for mounting.— CH AS. ■ 

 PETIT, 151, High Street. Stoke Newington. N. ; 



"HALL MARK" 

 FOR THERMOMETERS. 



The Kew Committee of the Royal Society hereby give Notice that after, 

 this date all Thermometers verified at the Kew Observatory will be marked,' 

 free of expense, with their monogram, ' K.O.," interlaced, and a register' 

 number, in addition to the maker's number. 

 1 he "Table of Errors will be furnished as usual. 

 By order, 



G. M. WHIPPLE, Superintendent. 

 Kew Observatory, December 13, 1878. 

 Scale of Charges for Verification, &c., post free on application. 



WITHERNDEN SCHOOL, CATERHAM 



VALLEY, SURREY.— Principal, Mr. C. H. LAKE, B.A Lend, (in; 

 Honours). Education on Natural Principles. A limited number of Pupils.' 



ROYAL POLYTECHNIC— CLASSES fori 



the preparation of Students for University Examinations, under thti 

 direction of EDWARD B. AVELING, D.Sc, F.L.S. London Uni-I 

 versity Matriculation, ist and 2nd B.Sc, Prelimicary Scientific M.B.,' 

 Botany, Physiology, Chemistry. All the work practical. 



DUNHEVED COLLEGE (LIMITED), 



LAUNCESTON, CORNWALL. | 



Seven hours from London. Separate Bedrooms. Systematic Teaching 

 in Science, Foreign Languages, and University Courses. 

 Calendar post free firom 



The Principal— benjamin RALPH. LL.B. Dub. 



ENGRAVINGS AND ELECTROTYPES 



FOR SALE, at prices ranging from is. to 10s., in good condition, ready for 

 printing. Small, medium size, and large engravings, comprising a great 

 variety of subjects, suitable for Publishers, Advertisers, and Amateurs. 

 Specimen of any subject required sent post free on application. 



FACSIMILE OF SIGNATURE for 3^. An exact copy of any namei 

 guaranteed. These signatures being engraved in bold relief, are useful foi' 

 Stamping Books, Circulars, and Documents, or Marking Linen, and mad« 

 t]rpe-high for ordinary Letterpress Printing. 



Sent post free to any address on receipt of 36 stamps. 



FLEET STREET, LONDON, E.G. 



ARTISTIC— To Ladies and Gentlemen with 



some leisure time, desiring to supplement their incomes, an opportiinil> 

 is offered of acquiring the ART of DRAWING and ENGRAVING, 

 on WOOD in a thoroughly satisfactory and perfect style. The terms 

 are moderate, and the hours can be made to suit the convenience ofl 

 pupils. Persons residing in the country can receive full instruction b> 

 correspondence. For further particulars call or address Mr. J. Fkan ic 

 LIN Nash, Artist and Engraver, 75. Fleet Street, London, E.C. 



SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, Shehrnkss-on-Sea, respectfully intimates tha 

 the appeal recently made by him has been so heartily responded to, that h< 

 cannot receive any more orders for " extra selected "specimens at present. 



Orders for lor. Collections of 100 "good" specimens can be executec 

 without delay. ,. 



" NOTES ON THE GEOLOGY OF SHEPPEY " post free on apph 



cation. 



