stations of the society during the past five years. 

 The results show that the temperature of the soil at 

 one foot at nearly all the stations in the winter 

 months is almost the same as that of the air, while 

 in the other months of the year the temperature of 

 the soil is higher than that of the air at all except 



that of the London station. Mr. A. W. Clayden, 



in a note on the after-glows of 1883-84, suggested 

 that the after-glows were the result of the water- 

 vapor erupted from Krakatoa, and that the dust and 

 other ejecta played but a secondary part in the pro- 

 duction of the phenomena. 



Calendar of Societies. 



Royal society of Canada. 

 May 25-27. — T. Sterry Hunt, The genetic history 

 of crystalline rocks ; Supplement to ' A natural 

 system of mineralogy ; ' E. Deville, Le choix d'une 

 projection pour la carte du Canada ; G. Paxton 

 Young, Abel's forms of the roots of solvable equa- 

 tions of the fifth degree ; A. P. Coleman, A meteor- 

 ite from the north-west ; E. J. Chapman, On the 

 coloring- matter of black tourmentines and other 

 deeply-colored silicates ; Sandford Fleming-, Memoir 

 on time-reckoning for the twentieth century ; Robert 

 Bell, On some points in reference to ice phenomena ; 

 B. J. Harrington, On some Canadian minerals ; 

 T. G. W. Burgess, On some recent additions to 

 Canadian ferns ; J. C. K. Laflamme, Une etude 

 geologique sur les phenomenes de contact entre les 

 formations siluriennes et arcbeennes de la province 

 de Quebec ; Quelques notes sur la purete de la glace 

 des rivieres, exposant surtout le resultat destravaux 

 que j'ai faits & Quebec dans le cours de l'hiver ; 

 G. F. Matthew, On the Cambrian faunas of Cape 

 Breton and Newfoundland ; Illustrations of the fauna 

 of the St. John group ; R. Chalmers, Notes on the 

 glaciationand pleistocene subsidence of northern New 

 Brunswick and south-eastern Quebec ; L. W. Bailey, 

 On the Silurian system of northern Maine, New 

 Brunswick and Quebec ; J. F. Whiteaves, On some 

 marine invertebrata from the Pacific coast of 

 Canada ; Sidney T. Smith, On the Crustacea (marine) 

 collected by Dr. Dawson last year ; J. F. Whiteaves, 

 Illustrations of the fossil fishes of the Devonian rocks 

 of Canada ; G. M. Dawson, On certain borings in 

 Manitoba and the north-west territory ; William 

 Dawson, On the fossil flora of the Laramie series of 

 western Canada; E. Gilpin, jun., Notes on the car- 

 boniferous marine limestone formation of the East 

 River, Pictou county, N.S.; G. M. Dawson, Notes on 

 some points in Arctic American geology ; William 

 Dawson, Presidential address on ' The obligations of 

 geological science to Canada ; ' D. P. Penhallow, 

 Mechanism of movement in Cucurbita, Vitis, and 

 Robinia ; Charles Lap worth, Preliminary report on 

 the graptolites from the lower paleozoic rocks of the 

 south side of the St. Lawrence from Cape Rozier to 

 the Tartigo River, from the rocks of Orleans Island, 

 Cape Rouge, and Core Fields, Quebec. 



Rensselaer society of engineers, Troy. 

 June 15. — Francis Collingwood, Some often 

 neglected duties of the engineer. 



Academy of natural sciences, Davenport, Io. 

 May 28. — 0. S. Watkins, The Sandwich Island 

 group and volcanoes, in connection with the recently 

 reported disappearance of a lava lake there. 



U. S. naval medical society, Washington. 



June 3. — John C. Wise. Notes from the medical 

 journal of the U. S. S. Jamestown; Adrian Hudson, 

 The use of Rola in certain cardiac affections; Henry 

 G. Beyer, On some recent advances in the anatomy 

 and physiology of the vaso motor system of nerves. 



Publications received at Editor's Office, May 31-June 5. 



Adolph, H. Archaiologische glossen zur urgeschichte. Moses, 

 Herodot, Mythologisches. Thorn, Lambeck, 1886. 43 p. 8°. 

 (New York, Stechert, 80 cents.) 



Branner, J. C. Glaciation of the Wyoming and Lackawanna 

 valleys. Philadelphia, A titer, phil. soc. , 1886. [20] p., 2 pi. 8°. 



Davenport academy of natural sciences, proceedings of the, 

 1882-84. Vol. iv. Davenport, Io., A cad. nat. sc., 1886. 347 p., 

 5 pi., illustr., portr. 8°. 



Gordon, A. R. Charts showing the mean, monthly and an- 

 nual temperatures of Hudson's Bay region and eastern Canada, 

 September, 1884, to October, 1885. Ottawa, Government, [1886.] 

 50 X 34 cm. 



Hudson's Bay expedition, report of the second, under the 

 command of Lieut. A. R. Gordon, R.N., 1885. Ottawa, Govern- 

 ment, [1886.] 112 p., 5 pi. 8°. 



Ingalls, J. M. Exterior ballistics in the plane of fire. New 

 York, Van Nostrand, 1886. 128+45 p , 1 pi., illustr. 8 °-. 



Juraschek, F.v.,ed. Otto Hiibner's geographisch-statistische 

 tabellen aller lander der erde. Frankfurt-a-M. , Rommel, 1886. 

 47 p. 48 . (New York, Stechert, 40 cents ) 



Lancaster, A. Liste generale des observatoires et des astro- 

 nomes, des societes et des revues astronomiques. Bruxelles, 

 Hayez, impr., 1886. 114 p. 16 . 



Rees, J. K. A new electric winding apparatus for clocks. 

 (N. Y. acad. sc.) New York, Stettiner, Lambert &f Co., pr., 

 1886. 12 p., illustr. 8°. 



Stoll, O. Guatemala. Leipzig, Brockhaus, 1886. 12+518 p., 

 2 maps, illustr. 8°. (New York, Stechert, $5.50.) 



Tucker, W. G. The sanitary value of the chemical analysis of 

 potable waters. Albany, Trans. Albany inst., [1886.] [14] p. 

 8°. 



U.S. life-saving service, annual report of the operations of the, 

 for the year ending June 30, 1885. Washington, Government, 

 1886. 423 p., illustr. 8°. 



Wundt, W., ed. Philosophische studien. Band iii. heft 2. 

 Leipzig, Engelmann, 1886. L141] p., illustr. 8°. (New York, 

 Stechert, $1.50.) 



Zoologische jahrbiicher. Zeitschrift tiir systematik, geo- 

 graphic und biologie der thiere. Band i. heft 1. Jena, Fischer, 

 1886. 224 p., 5 pi., illustr. 8°. (New York, Stechert, $3.30.) 



Advertised Books of Reference. 



INSECTS INJURIOUS TO FRUITS. By Prof. William 

 Saunders, F.R.S.C. Handsomely illustrated with 440 wood en- 

 gravings. Crown, 8vo. Cloth. $3. J. B. Lippincott Company, 

 Pubs., Philadelphia. 



LIPPINCOTT'S BIOGRAPHICAL DICTIONARY. A 

 new, thoroughly revised, and greatly enlarged edition. A univer- 

 sal pronouncing dictionary of biography and mythology. Con- 

 taining complete and concise biographical sketches of the eminent 

 persons of all ages and countries. By J. Thomas, M.D., LL.D. 

 Imperial 8vo. 2550 pages. Sheep. $12.00. J. B. Lippincott 

 Company, Pubs., Philadelphia. 



WILSON. — AMERICAN ORNITHOLOGY; or, The 

 Natural History of the Birds of the United States. By Alex- 

 ander Wilson With a life of the author, by George Ord, F.R.S. 

 With continuation by Charles Lucien Bonaparte (Prince of Mu- 

 signano.) Popular Edition, complete in one volume with 385 

 figures of birds. Imp. 8vo. Cloth, $7.50. Half Turkey mor., 

 $12 50. Porter & Coates. Philadelphia. 



ANNALS OF MATHEMATICS. Edited by Ormond Stone 

 and William M. Thornton. Office of Publication : University of 

 Virginia. $2 per vol. of 6 nos. 



GEOLOGY. CHEMICAL, PHYSICAL. AND STRATI- 

 GRAPHICAL. By Joseph Prestwich, M.B., F.R.S. , F.G.S. 

 Correspondent of the Institute of France, Professor of geology 

 in the University of Oxford. In two vols. Vol. 1.: Chemical and 

 Physical. 8vo. $6.25. (Oxford University Press.) Macmillan 

 & Co., Pubs., New York. 



THE INTERNATIONAL CYCLOPEDIA. The best for 

 popular use and specially adapted for ready reference. Fifteen 

 royal 8vo volumes. 13,206 pages, 49,649 leading titles. Sold only 

 by subscription. Capable salesmen wanted. Dodd, Mead & 

 Co., Pubs., New York. 



