SCIENCE.— AD VERTISEMENTS. 



SCIENCE. 



A WEEKLY JOVBNAL DEVOTED TO THE AD- 

 VANCEMENT OF SCIENCE. 



Entered in the post-office at Lancaster, Pa., as second-class 

 matter. 



TERMS OF SUBSCRIPTION. 



Five dollars ammally in advance : single copies 15 

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Foreign subscribers may send their subscriptions 

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 Mayer & Jliiller, Markgrafen Str., 51, Berlin (M. 21, 

 single copies 70 P£); or Gustav E. Stechert, 76 Rue 

 de Eennes, Paris (26 fr., single copies 80c). 



The publisher can supply most of the back volumes 

 of Science at the regular subscription rates. Single 

 copies of nearly all the numbers can also be supplied 

 at the price of 25 cents for numbers earlier than 

 July, 1887, or 15 cents for later numbers. 



TERMS FOR ADVERTISING. 



Insertions, one four thirteen twenty-six fifty-two 



One page, $25.00 $95.00 $292.50 $.520.00 $975.00 



Half page, 13.00 49.40 152.00 270.40 507.00 



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One inch. 2..50 9.50 29.25 .52.00 97.60 

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Macmillan & Co., 



NEW YORK and LONDON. 



The demand for back numbers of Sci- 

 ence has been greater than had been 

 foreseen. The publishers will be greatly- 

 indebted to any one who may be able to 

 send to 41 Mast 4gtb St., New York, cop- 

 ies of the issues of Jan. 25th, Feb. 1st, 

 Feb. istb, Feb. zzd, March ist, March 

 8th, May 24th, May 31st, or Aug. 2d, and 

 will extend the time of subscription of 

 any one who will forward these numbers. 

 The publisher would be glad to buy cop- 

 ies of Science, Old Series, Nos, zgS, 478, 

 491, 513 and 554, and will pay 25 cents 

 each. 



The Subscription Price Reduced from 

 $8.00 to $6.00 a year. 



Littell's Living Age. 



A MAGAZINE OF FOREIGN PERIODICAL LIT- 

 ERATURE. UNEQUALLED IN QUALITY 

 AND QUANTITY.* -i^UBLISHED WEEKLY. 



The world's greatest intellects contribute to make 

 this periodical encyclopedic in scope, character, com- 

 prehensiveness. 



Every intelligent reader will find in The Living 

 Age food to nourish, stimulate and inspire thought. 



The ablest and brightest men and women of the 

 world have read and commended it during more than 

 half a century. 



' ' Exhaustive reviews of recent publications, the lat- 

 est results of scientific research, biographical sketches 

 of eminent characters, travel, exploration, literary 

 criticism, and every phase of culture and progress in 

 Europe, fiction and choice poetry — all these making 

 up 'The Living Age.' " — Evening Biilletin, Phila. 



A weekly magazine, it gives more than three and 

 a quarter thousand double-column octavo pages of 

 reading matter yearly, forming four large volumes. 



The Subscription REDUCED 



from $8.00 to $6.00 a year. 



This makes The I^iving Age absolutely the cheap- 

 est magazine published. 



CLUB RATES. 



For 59.00 The Living Age and any one of the 

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 for a year, postpaid. 



Rates for clubbing The Living Age with other 

 periodicals will be sent on application. 

 Address, 



LITTELL & Co., 



p. O. Box 5206, BOSTON, HASS. 



The Total Eclipse of the Sun, August 9th, 1896. 



The Orient Steam Navigation Company, Ld., propose 

 to send one of their steamships of about 4000 tons gi-oss reg- 

 ister and 3000 H. P., to Vadso in the Varanger Fiord, Lap- 

 land (about 30° E. Long.) to enable observation to be made 

 of the above eclipse. 



Itinerary:— Leave London 24th July, visit Bergen, Gudvan- 

 gen (for Eomsdal Vallev), Naes, arrive Vadso 3rd August. 

 Leave Vadso 10th, call at Trondhjem; arrive London 18th 

 August. 



Passage Money 40 Guineas. 



Preliminary deposit on booking, £5. Early application is 



Managers:— F. Green & Co.: Anderson, Anderson & Co. 



Head Offices:— Fenchurch Avenue, London, England. 



For further particulars apply to the latter firm, 5 Feu- 

 church Avenue, E. C, or to the West End Branch Office, 16 

 Cockspur Street, S. W., London, England. 



