SCIENCE 



SixiH Year. 

 Vol. XII. No. 297. 



NEW YORK, October 12, 1888. 



Single Copies, Ten Cents. 

 I3.50 Per Year, in Advance. 



Entered at New York Poat-Offlce as Seoond-Olass Mail-Matter. 



Editorial . . 



The Inquiry in Regard to reclaiming the Arid Lands of the Far 

 West 



Scientific News in Washington. 



The Cuban Hurricane . . , , . 



Trees on Arid Lands ..... 



Health Matters. 



Recovery from Lightning-Shock 

 Death of Professor Proctor 

 Physical Exercise among Celestials . 

 Poisonous Effect of Petroleum 

 The Value of Vaccination 



Electrical Science. 



Is the Velocity of Light in an Electrolytic Fluid influenced by 



an Electric Current in the Direction of Propagation ? 

 The Tudor Accumulator ..... 

 The Employment of Mica in Condensers 



Mental Science. 



Association by Contrast ..... 

 Hypnotism and Crime ..... 

 Psychic Effects of Hasheesh .... 



169 



169 

 170 



171 

 172 

 172 

 172 

 173 



173 

 173 

 174 



174 

 174 

 175 



Book-Reviews. 



Elementary Political Economy 



Report of the Geological Survey of Ohio 



Chambers's Encyclopaedia . 



The National Revenues 



Is Protection a Benefit ? 



The Building of the British Isles 



American Commonwealths. Indiana 



Publishers' Fall Announcements, 



Ginn & Co. 



E. L. Kellogg & Co. 



A. C. McClurg & Co. 



Charles Scribner's Sons 



Scribner & Welford 



Miscellaneous 



Notes and News 

 Letters to the Editor. 



A Notable Evolu' ion 

 The Zodiacal Light 

 Periodicity of Thunder-Storms 



Henry L- Ward 



O. T. Sherman 



M. A. Veeder 



175 

 175 

 176 

 176 

 176 

 176 

 177 



177 

 177 

 178 

 178 

 178 

 178 



179 



180 

 180 

 180 



The Science Company, Pttblishers, ^7 Lafayette Place, New York. 



London ageni : G. E. Stechert, 26 King William St., Strand. 



LONGMANS, Gr*¥,.EN, & CO. 



liOnsriDoiT .^iTiD nsTEi 



'»? 



JUST READY. 



'J. GWILT'S Encyclopaedia of Architecture : 

 Historical, Theoretical, and Practical. Illus.rated 

 witli about 1,700 engravings on wood. New Edi- 

 tion (the ninth). Revised, portions rewritten, and 

 with additions by Wvatt Papworth, F R.I., B.A., 

 etc. Cloth. SI7-50- 



2. THE STEPPING STONE TO ARCHI- 



TECTURE. By Thomas Mitchell. With 49 

 figures and 22 plates. i8mo. Cloth. 50 cents. 



3. THE STANDARD OF VALUE. By 



William Leichton Jordan, F.R.G.S., etc. Fifth 

 Edition, with a review of the evidence submitted 

 to the koval Commission on Gold and Silver, 1888. 

 8vo. Cloth. $2.00. 



4. LONGMAN'S SCHOOL GRAMMAR. 



By David Salmon. Crown. 8vo. 272 pages. 



75 t 



ughly a working 1 



>book' 



yournal 0/ Edu- 

 most elementary gram- 



Works by the Late Richard A. Proctor. 



OLD AND NEW .ASTRONOMY. *^* 

 Part I was published in April, 1888, and the work 

 will be completed in twelve monthly parts and a 

 supplementary section. In each part there will be 

 64 pages imp. 8vo, many cu s, and two plates, or 

 one large folding pLate. The price of each part 

 will be 90 cents ; that of the supplementary section 

 containing tables, index, and preface, 35 cents. 

 The price of the complete work in cloth, $12.00. 

 Part VI. just ready. 



THE ORBS AROUND US. A Series of 

 Essays on the Moon and Planets. Meteors and Com- 

 ets. With Chart and Di.agr.ims. Crown 8vo. $1.75. 



OTHER WORf.DS THAN OURS 



Plurality of Worlds Studied under the Light of 

 Recent Scientific Researches. With 14 Illustra- 

 tions. Crown 8vo. $1.75. 



THE MOON Her Motions, Aspects, Scenery, 

 and Physical Condition. With Plates, Charts, 

 Woodcuts, and Lunar Photographs. Crown 8vo. 



LARGER STAR ATLAS for the Library. 

 In 12 Circular Maps, with Introduction and 2 in- 

 dex pages. Folio. $6.00. 



NEW STAR ATLAS for the Library the 

 School, and the Observatory. In 12 Circular Maps 

 (with 2 Index Plates). Crown 8vo. $1.75- 



^oi?,:k: 



The 4- " 



%.i 



The World in 

 :tricallv overlap- 

 projection and scale 

 lOut appreciable dis- 



THE STUDENTS' ATLAS. 



12 Equal Circular Maps, sy 

 ping, all on the same central 

 (that of a 12-inch globe), witl 

 tortion. 8vo. [Shortly.] 



LIGHT SCIENCE FOR LEISURE HOURS. 



Familiar Essays on Scientific Subjects, Natural 

 Phenomena, etc. Crown 8vo. 3 Series each. 

 $1.75. 



CHANCE AND LUCK. A Series of Re- 

 printed Articles. Crown 8vo. $1.75. 



EASY LESSONS IN THE DIFFEREN- 

 TIAL CALCULUS. Indicating from the Outset 

 the Utility of the Processes called Differentiation 

 and Integration. i2mo. go cents. 



FIRST STEPS IN GEOMETRY. A .Series 

 of Hints for the Solution of Geometrical Problems. 

 With Notes on Eu:lid. Useful Working Proposi- 

 tions, and many Examples. i2mo. Si.25. 



\TISE ON THE CYCLOID AND 

 '* I ALL FOR.MS OF CYCLODI.\L CURVES, 

 ix.id on the Use of Cyclidial Curves in dealing with 

 the Motions of Planets, Comets, etc., etc. With 

 161 Diagrams. Crown 8vo. S3. 75. 



THE SHORTEST SEA-ROUTES, AND 

 MAPS FOR FINDING THEM IN A FEW 

 SECONDS (Great-Circle Sailing). 4to, sewed, 

 35 cents. IJust ready.] 



HOW TO PLAY WHIST : 

 and Etiquette of Whist. Cro\ 



with the Laws 

 nSvo. $.75. 



HOME WHIST: an Easy Guide to Correct 

 Play. i6mo. 40 cents. 



THE POETRY 



Series of Familia 



OF ASTRONOMY. 



Essays, Crown 8vo. $2.0 



THE SEASONS PICTURED IN 48 SUN 

 VIEWS OF THE EARTH, and 24 Zodiacal 

 Maps, etc. Demy 4to. $2.00. 



STRENGTH AND HAPPINESS. Crown 



ROUGH WAYS MADE SMOOTH. Fam- 

 iliar Essays on Scientific Subjects. Crown 8vo. 

 S200. 



PLEASANT WAYS IN SCIENCE. Crown 

 8vo. $2.00. 



MYTHS AND MARVELS OF .\STRON- 

 OMY. Crown 8vo. $2.00. 



THE GREAT PYRAMID: Observatory, 

 Tomb, and Temple. With Illustrations. Crown 

 8vo. $2.00. 



-l/essrs. Longmans. Oreen & Co. will he happy to send their Catalogue of General and Educational Books post free to any ad- 

 dress furnished for the purpose. 



LOiNGMANS, GREEN & Co., 15 East i6tli Street, New York. 



