Ixxiv 



NATURE 



\Jan. 9, 1879 



MICROSCOPIC OBJECTS 



Of lUperlatiTe perfection, illustrating Histology and every branch of Micro- 

 scopy. Catalogue post free and gratis on application. 



PARIS UNIVERSAL EXHIBITION, 1878. 



Prixe Medal awarded for Excellence, Variety, &^c. 

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



LIBRARY OF HARVARD UNIVERSITY, 

 CAMBRIDGE, MASS., U.S.A. 



Paclcai^ea for the General Library, or for any of the Departatental 

 librariei (Astroneniical Observ-atory, Botanic Garden, Bussey Institution, 

 Striaity Schoal, Law Schvol, Museum of Comparative Ztolo^y, Scientific 

 Sch*«l), may be seat to the Atents, Messrs. TkCxnek & Co., 57 and 59, 

 LudcateHiU, Lcndoa. 



JUSTIN WINSOR, LiWarian. 



BERNE RS COLLEGE.— The Laboratory 



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

 •Tcning. ANALYSES performed. Especial arrangements for Gentle- 

 Men and Ladies preparing for the ranout Examining Boards. Feet 

 moderate. — Apply to Prof Gakonxk, at Bemers College, 44, Bemers 

 Street. W 



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. 



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 Ss. ; to others, ;^io los. 



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

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



ROYAL SCHOOL OF MINES. 



Dr. FRANKLAND, D.C.L., F.R.S., will commence a Course of Thirty 

 Lectures on "Organic Chemistry," at South Kensington, on Friday, 

 JANUARY 17, at 10 o'clock, to be continued on each succeeding Monday, 

 Wednesday, and Friday, at the same hour. Fee, £2 '• 'o those who have 

 attended the previous Course, £2. 



TRENHAM REEKS, Registrar. 



MATRICULATION.— LONDON 

 UNIVERSITY. 



Six months' Course. Fee, ;^io loj. 



1ST BACHELOR OF SCIENCE and PRELIMINARY SCIENTIFIC 

 M.B. Six months' Course. Fee, ;f 10 loj. 



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. 



The REV. LEWIS HENSLEY, Vicar of 



Hitchin, Herts, and Rural Dean, formerly Fellow and Assistant-Tutor 

 of Trinity College, Cambridge, receives several Pupils, to prepare for 

 Cambridge, and has now a VACANCY. 



SUNDAY LECTURE SOCIETY.— LEC- 



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

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

 January s- — Benjamin W. Richardson, Esq., M.D., LL.D. , F.R.S., 

 on " Anaesthetic Sleep, and the Temporary Abolition of Pain." 

 Second Lecture. With Oxyhydrogeii Lantern Illustrations. — Members' 

 Annual Subscription, p^Ji. Payment at the Door — One Penny, Sixpence, 

 and (reserved seats) One ShilUng. 



"IrOYAiT institution OF GREAT 

 BRITAIN, 



ALBEMARLE STREET, PICCADILLY, W. 

 Lecture Arrangements, Three o'Clock. 



Professor E. A. SckAfer, F.R.S. — Twelve Lectures on Animal Deve- 

 lopment ; Tuesday next, January 14 to April i. — One Guinea the Course. 



J. H. Gordon, Esq. — Four Lectures on Electric Induction; Thursday 

 next, January 16 to February 6.— Half-a-Guinea. 



Professor H. G. Skeley, F.L.S., F.G.S. — Three Lectures on Reptilian 

 Life ; Saturday, January 18, 25. February i. — Half-a-Guinea. 



Subscription to all the Courses in the Season, Two Guineas. 



Friday, January 17th, at 9 p.m.. Professor Tyndall on the Electric 

 Li|?ht. 



Members and Friends only admitted. 



SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, Sheerness-on-Ska, respectfully intimates that 

 ihe appeal recently made by him has been s* heartily responded to, that he 

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



Orders for loj. Collections of 100 "good" specimens can be executed 

 without delay. 



"NOTES ON THE GEOLOGY OF SHEPPEY" post free on appU- 



LIVING SPECIMENS FOR THE MICROSCOPE. 



THOMAS BOLTON, MICROSCOPIST'S and NATURALIST'S 

 STUDIO, 17, ANN STREET BIRMINGHAM. 

 RAPHIDIOPHRYS PALLIDA, 



The Freshwater Rhixopoda of F. Schulze figured in Archiv fUr- 

 ntikroskof. 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, Akyonidium . 



Also tloscules, some fine Melicerta ringens, and Volvox globai»r, &c. 

 Price List of Specimens on Application, with Stamped Addressed Envelope. 



Weekly Announcements will be maide in this place of Organisms ready 

 for sale. 



"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. 

 The 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. Lond. fn 

 Honours). Education on Natural Principles. Alimitednumber of Pupils. 



ROYAL POLYTECHNIC— CLASSES for 



the preparation of Students for University Examinations, uader the 

 direction •f EDWARD B. AVELING, D.Sc, F.L.S. L»ndon UnL- 

 Tersity Matriculation, ist and 2nd B.Sc, Preliminary Scientific M.B., 

 Botany, Physiology, Chemistry. All the werk practical. 



DUNHEVED COLLEGE (LIMITED), 



LAUNCESTON, CORNWALL. 

 Seren hours from London. Separate Bedrooms. Systematic Teaching 

 in Science, Foreign Languages, and University Coursks. 

 Calendar post free from 



The Principal— BENJAMIN RALPH. LL.B. Dufc. 



ENGRAVINGS AND ELECTROTYPES 



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

 priiiting. 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 35. An exact copy of any name 



fuaranteed. These signatures being engraved in bold relief, are useful for 

 tamping Books, Circulars, and Documents, or Marking Linen, and made 

 t3T)e-mgh for ordinary Letterpress Printing. 

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



75, FLEET STREET, LONDON, E.G. 



ARTISTIC— To Ladies and Gentlemen with 



some leisure time, desiring to supplement their incomes, an opportunity 

 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 of 

 pupils. Persons residing in the country can receive full instruction by 

 correspondence. For further particulars call or address Mr. J. Frank- 

 lin Nash, Artist and Engraver, 73, Fleet Street, London, E.C. 



GEOLOGY In the Preface to the Student's 



ELEMENTS of GEOLOGY, by Sir Charles Lyell, priee ^., he says : 

 —"As it is impossible to enable the reader to recognise rocks and mine- 

 rals at sight ky aid of verbal descriptions or figures, he will do well to 

 obtain a well arranged collection of specimens, such as may be procured 

 from Mr. TENNANT (149, Strand), Teacher of Mineralogy at King's 

 College, London." These Collections are supplied on ute following 

 terms, in plain Mahogany Cabinets :— 



lao Specimens, in Cabinet, with 3 Trays ... m. .~ ;f 3 • • ° 

 300 Specimens, in Cabinet, with 5 Trays ... ... .~ 5 5 o 



300 Specimens, in Cabinet, with 9 Drawers 10 10 o 



400 Specimens, in Cabinet, with 13 Drawers ... ... zi • • 



Mere extensive Collections at 50 to 5,000 Guineas each. 



EOZdON CANADENSE. 



JAMES R. GREGORY has just received a large number of very fine 

 Specimens of the above, at all prices ; also Sections of the same, cut fiT 

 the microscope. Price of Specimens polished, 5^., loj., and upwards. 

 Microscopic Sections, post free, q.s. id. each, of 



JAMES R. GREGORY, 

 GEOLOGICAL MUSEUM. 



88, CHARLOTTE STREET, FITZROY SQUARE, 



LONDON. 



