October ig, 1905 J 



NATURE 



UNIVERSITY OF BIRMINGHAM. 



LECTURER AND DEMONSTRATOR OF CHEMISTRY. 

 Owing to the appointment of Dr. Alexander McKenzie to tlie Lectureship 

 in Chemistry at the Birkheck College, London, applications are inx iled for 

 the above vacancy. Salary, ^£175 per annum Applications, with state- 

 ment of qualit^caiions. age. degree, tesiimunials, .-^c. -hould be immediately 

 .addressed to the Secrf takv. University of Birmingham. 



Competent Lecturer required to undertake a 



short Course of Six Weekly Lessons in Elementary Science Topics 

 suitable for railway employees. Remuneration, £,\ 15 per lesson. 

 Applicants should det.ail their qnalifications and experience, and give 

 some idea of the scope of instruction they would propose to impart, and 

 also the method they would propose to pursue. Apply at once to the 

 Sechetahv, W.llesden PolyKchnic, Prioty Park Road,'Kilburn. N.W. 



TO SCIENCE AND MATHEMATICAL 



MASTERS.— January (ijo6) V.rcancies.— Graduates and other well 

 qualified M.asters seeking posts in Public and other Schools for next 

 term should apply at once, giving full details as to qualifications, &c., 

 to Messrs. Grifkiths, Smith. Powell & Smith, Tutorial Agents 

 {Estd. 1833), ,14 Bedford Street, Strand, London. Immediate notice 

 of all the best vacancies for Science and Mathl. Masters will be sent. 



FOR SALE.— 18-inch Spark Induction Coil, 



Newlon..\pps, in perfect condition ; also several ic-inch Spark Coils, 

 Newion Apps, and others, jet breaks and accessories.— G. Bow ron, 

 s; Edgware Road, London, \V. 



TO SECRETARIES OF LECTURE SOCIETIES 

 AND OTHERS. 



A Set of LANTERN SLIDES illustrating the beautiful and 

 historic resort of Hastings and St. Leonards and neighbourhood, 

 together with a typed lecture, are now ready and can be had on 

 loan gratis by application to CHARLES A. THARLE, Honorary 

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TYPE-WRITING UNDERTAKEN BY 



HIGHLY EDUCATED WOMEN ACCU.STOMED TO SCIEN- 

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.11 SI fl 1:1. ISUF.lt. 



ZOOLOGICAL CATALOGUE. 



Part 3. ENTOIVIOLOGY. 



I'nsI rrer o,< iivpliiulU.n. 



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An explanatory chart of the metric system can now 

 be obtained on application to the Secretary at the 

 above address, price I/-. Or it can be supplied, 

 mounted on linen, fitted with rollers and varnished, 

 for 5-. Postage is included in both cases. The 

 chart measures 112 centimetres 61 centimetres 



(44 ins. • 24 ins.) 



The chart was compiled by Mr. J. G. Pilter, of 

 Paris (a member of the Executive Committee), and 

 bears the written approval of Lords Kelvin, Belhaven 

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Aeschynit, 2/- per o/. Emanium, 30/- per dei.ii;rauime. 

 Spartcitc (see Nature. March 31, 1904, page sjO, 2/- per piece, 

 Chloropheinc, 11- per piece, Samarskite, 2- per 01. 

 Zinc Sulphide, srecii and yellow, 5/- per tube, 2,6 half tube. 

 Rad. Residue, 2 - per tube. Polonium, 21/- per gram ; 11'-lgram. 

 Flexible Sandstone, 5,- to 50/-. isee N.nturk, June 2j, 1904, 



iKiie 1-:,.) Radio-active Mud, 1/6 per bottle, 

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 Diamond chips and powder, ID/- per caiat(best quality), 

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 Bar. Plat. Cyan., fur Screens 3/- gramme, 60/- o/. Crystals, 4/- 



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screens, 6d. per Miuare in h. Electroscope (special), 21/- 

 Spinthariscopes (special). 15/-, 10/6 and 7/6. 

 jseicctiun of Minerals in boxes, 2 6, 5 6, 10 6 .^nd 21/-. 

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 (See ^ATuKi£, May 12, 1904, page 44.) 

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