Imágenes de páginas
PDF
EPUB

LITERARY NOTICES.

SUN Views OF THE EARTH; OR, THE SEASONS ILLUSTRATED. Comprising Forty-eight Views of the Earth as supposed to be seen from the Sun at different Hours and Seasons. With five enlarged Sun Views of England, and a Diagram representing the Earth's daily motion in her orbit. By Richard A. Proctor, B.A., F.R.A.S., late Scholar of St John's College, Cambridge; and of King's Col. lege, London. Author of “ Saturn and its System," " The Constellation-Seasons," etc. (Longmans.)—The changes from spring to summer, antumn, and winter, depending on the positions taken up in succession by the earth in its journey round the sun, may be represented by a series of views of the earth as it might be seen from the sun at any point of the journey. The places which the sun looks straight at will receive a full share of light and heat, those which he looks at more slantingly will receive less, and those out of his reach none at all. Mr. Proctor has devised a highly instructive and pleasing set of pictures illustrating these facts, and giving a far better notion of the cause of the seasons than any diagram we have seen. Plate I. gives four coloured views of the earth at the winter solstice (Dec. 21), at 6 a.m., 6 p.m., noon, and midnight; and at a glance it is seen how the northern regions are fore. shortened and the polar portions out of the sun's sight. Plate II. has similar views representing the state of things one month later, and so on in succession through spring and summer to a month before the winter solstice, represented in Plate XII. The XIIIth Plate shows on a larger scale the way in which Great Britain, France, Holland, Denmark, etc., are presented to the sun at various periods of the year. We are glad these drawings are published at à very moderate price, because they will, with the help of the explanatory letter-press, be of great use to schools and families, and to teachers who wish to know how these matters may be made most intelligible to their pupils.

We have also received from Messrs. Longman four charts drawn by Mr. Proctor: one of the Zodiac, on which, with the help of an almanack, the paths of the moon and planets may be easily traced; another of Mars representing that planet as seen from the earth at various points of his rotation. Two other charts represent the orbits of Mars, the Earth, Venus, and Mercury; and of Neptune, Uranus, Saturn, and Jupiter. A great deal of astronomical information is compressed in these diagrams, which are well worth attentive study.

How To USE THE BAROMETER, 1868. By the Rev. R. Tyas, M.A. Cantab., F.M.S., Member of the Scottish Meteorological Society. Author of " Favorite Wild Flowers,” etc. (Bemrose and Sons.) –The author also calls this little book “A Companion to the Weather-glass.” It contains useful information about instruments, and a series of tabular forms to facilitate the registration of meteorological changes. These are very handy, though on a somewbat small scale. The author likewise does a little weather prophecying, founded upon principles which he does not explain, but which, he asserts, have usually led to correct anticipations. He says, “ Although we are unable to say positively that there will be rain in any period—say of seven or eight days—yet the probability approximates so nearly to a certainty, that we may reasonably expect rain or fair weather about the times herein stated, and this expectation leads us to watch more carefully the signs of change." Those who buy this little book may amuse themselves by testing the value of these prophecies.

PHOTOGRAPHS OF EMINENT MEDICAL MEN OF ALL COUNTRIES. With brief Analytical Notices of their Works. Edited by Wm. Tindal Robertson, M.D., M.C.P. The Photographic Portraits from Life, by Ernest Edwards, B.A. Cantab. No. 7, Vol. II. (Churchill and Sons.)—The portraits now given of this interesting series are those of Erasmus Wilson, F.R.S., Sir James Bardsley, and Dr. Thomas Hawkes Tanner. They are all good.

CLIMBING THE HILL. A Story for the Household, by the author of “A Trap to Catch a Sunbeam.” (Groombridge and Sons.) A tale by the author of so exquisite a story as “ A Trap to Catch a Sunbeam,” cannot fail to be welcome. The present story relates to a young couple “climbing the hill.” It is gracefully told, and being published in a very handsome form, will make an appropriate new year's gift.

RAIN: How, WHEN, WHERE, AND WHY IT IS MEASURED. Being a Popular Account of Rainfall Investigations. With Numerous Illustrations. By G. J. Symons, F.M.S. Editor of “ British Rainfall,” and “Symons' Monthly Meteorological Magazine." (Stanford : Simpkin.)—This is the best book on the subject to assist in spreading a knowledge of various matters pertaining to rainfall, the methods of measuring it, and the utility of the process. Some of the tabular matter is especially interesting, such as the “ Fluctuations in the Fall of Rain from 1726 to 1865," and the “ Approxi. mate mean Annual Depth of Rain at 165 Stations," in which we observe Lincoln, Southwell, and Stamford stand lowest at 20 inches, while the Stye, near Southwaite, in Cumberland, is at the head of the wet places, and shows an average of 165 inches. London stands at 24 inches, being the same as Norwich and Edinburgh. In addition to this information, we want to know the average moisture in the air, as places may have a good deal of rain distributed in heavy showers, and yet be on the average mucb drier than other spots where the rainfall is less, and the quantity of vapour greater. Mr. Symons points out the necessity of using the hygrometer as well as the rain-guage, and we hope that, in a few years, accurate information on the English climatology will be obtained. We agree with Mr. Symons' suggestion that local authorities should undertake the slight expense required for daily observation and records. Wind should be registered as well as rain and moisture, and so should temperature and atmospheric pressure. Magnetic and electric observations need not be so general, but should be established upon a system at public cost.

The Boy's Own Book. A Complete Encyclopædia of Sports,

and Pastimes, Athletic, Scientific, and Recreative. A New Edition, thoroughly Revised and considerably Enlarged. (Lockwood & Co.) - We are glad to see a new edition of this book; certainly one of the best ever written for boys, and having the advantage of containing matter for boys of all ages. The new edition is a very handsome volume of nearly 700 pages, richly illustrated. It relates to all kinds of sports and pastimes, indoor and out, and mingles with cricket, archery, gymnastics, etc., directions for keeping birds, rabbits, and other domestic pets, and enough scientific recreations of various sorts to stimulate to graver studies in their proper place. It is a book we cordially recommend as a new year's gift.

ON THE MIDDLE AND UPPER LIAS OF THE SOUTH-WEST OF ENGLAND. By Charles Moore, F.G.S. Reprinted from the Proceedings of the Somersetshire Archæological and Natural History Society, Vol. XIII. 1865-6. (Taunton: F. May.)—A very useful monogram on the subject of which it treats, illustrated with seven nicely executed plates, containing numerous figures.

PROCEEDINGS OF LEARNED SOCIETIES.

GEOLOGICAL SOCIETY.- Dec. 4.

Robert Etheridge, Esq., in the chair. Henry Alleyne Nicholson, Esq., read a paper on the Graptolites of the Skiddaw series, premising that the slates of that series corresponded with the Quebec group of Canada. He described twenty-four species.

P. Martin Duncan, Esq., M.D., described in a concluding paper the Fossil Corals of the West Indies. Dr. Duncan mentioned several curious facts in the distribution of West Indian corals, both fossil and recent, and especially the circumstance that, whilst Jamaica, San Domingo, and Guadaloupe present solitary species, mixed with those inhabiting shallow water or a reef, Antigua and Trinidad offer for consideration only reef species. In conclusion, the author drew attention to the confirmation by subsequent discoveries of his theory of an Atlantic Archipelago, which he had put forward in his earlier papers.

ROYAL MICROSCOPICAL SOCIETY.-Dec. 12.

James Glaisher, Esq., F.R.S., in the chair. C. Stewart, Esq., read a paper describing the pedicellariæ of the Cidaridæ. In the discussion which ensued, Mr. Jabez Hogg stated that he had seen pedicellariæ in certain star-fish pass fragments of food from one to another towards the mouth. A Fellow remarked that Agassiz had noticed their removal of fæcal matter from the neighbourhood of the anus. Mr. Stewart said that although such

actions might have been observed in certain species, many pedicellariæ were so situated as not to be capable of performing these functions, and that their real purpose was still undecided.

H. J. Slack, Esq., Sec. R.M.S., read a paper on a microscopic ferment found in red French wine, and probably being the same as M. Pasteur's mycoderma vini, though larger than that gentleman's measurements as given in “ Comptes Rendus.” The mycaderm he examined consisted of minate cells, which, when the wine was poured out, rose to the surface like a fine powder. It had not turned the wine sour. He succeeded in growing the penicillium glaucum from it in abundance, by simply exposing the wine to the air in a tumbler. Some of the cells placed in moist sugar and water occasioned a butyric fermentation, which seemed to be caused by their decay. After a few weeks the butyric acid and other compounds of nauseous odour disappeared, and the remaining cells then increased in number, and excited a vinegar fermentation. A mixture of the wine containing the cells with treacle and water, kept in a warm place, produced penicillium glaucum, and the fluid became only slightly acid,

NOTES AND MEMORANDA,

COMET III., 1867.-M. Hoek, of Utrecht, writes to the “ Astronomische Nachrichten" as follows :-“In my researches on cometary systems, I instanced Comets III. and V., of 1859, as probably belonging to the same system. I did not hesitate to attribute to them this character, on account of the extreme resem. blance of their elements, and the short interval between their appearances. Now, all of a sudden comes a new comet to supply un unexpected confirmation of these views; for the circles which represent the planes of these three orbits cross each other at the same point in the heavens. The three planes cut each other in the same line of intersection. Thus this line is necessarily parallel to the direction of the initial movement common to the three bodies at the moment they entered into the sun's sphere of attraction.” M. Hoek then gives the elements of their orbits, and states his belief that they had one common origin. Their aphelion points are situated at a considerable distance from the common point of intersection, or rather from the radiating point of their orbits. Their aphelion points are all on the same side of the line of radiation. Captain Jupman, who observed this comet at Portsmouth, in October, found it equal to a star of 8.0 or 8.1 mag., with faint coma and no tail.

New PLANET (95).—This body was discovered by Dr. Luther, at BilkDusseldorf, on the 23rd Nov., 1867. It appears of 10 to 11 mag.

NEW STARS NEAR a LYRA.—Mr. Buckingham reports the discovery of three very minute stars near Vega. One, c, is in a line between the well-known B and the great star; e is in the same direction, on the other side of it; d is like c, near Vega, but to the left of B on the meridian. The observations were made with the large object-glasses made by Mr. Wray, one of which (new) is 211 inches in diameter, and, according to Mr. Buckingham's report, works well with powers up to 1800. c and d, in the large object-glass, aro little brighter than the companion of Polaris, seen with an aperture of 1.7 inch. (See “Monthly Notices" for November.)

CONFLAGRÁTION COLOURS AND MOONLIGHT.-On the night of the 6th of December, the burning of Her Majesty's Theatre in the Haymarket occasioned

many curious chromatic effects. Immense flamos and flame-coloured clouds of highly luminous orange and red tints made the moon (about 11 days old) look positively blue. Sirius, which was flashing splendidly, varied in hue from blue to deep violet.

FECUNDITY OF THE Axolotis.—These curious amphibians, of which in 1864 the museum in Paris possessed five males and one female, have multiplied in captivity, so that more than 3300 have been produced from their eggs in two years and nine months. Some have been consumed in experiments, others died young, but at least 2500 have survived. Axolotls may be seen in the tanks of the Zoological Gardens.

PARALLAX OF THE SUN.-Notwithstanding the efforts hitherto made by astronomers, the exact parallax, and consequently the exact distance of the sun from the earth is not fully settled, and great interest is felt in the opportunities that may be afforded by the transit of Venus in 1874 and 1882. Meanwhile Mr. Simon Newcombe (U.S.) has been at work discussing minutely the observations of Mars in 1862. His results, communicated by M. Delaunay to the French Academy, make the solar parallax 8".85, with a probable error of + 0".013. This corresponds with a distance of the sun from the earth of a little more than 23,307 terrestrial radi, rather more than 148 millions of kilometres. Taking the earth as unity, the mass of the sun will be 326,800 + 1360, and that of the moon 51.44 I 0.33• Taking the sun's mass as unity, the mass of the earth and moon together will be 322,800 ·

ERUPTION OF VESUVIUS.-M. Pisani, writing from Resina, 13th November, 1867, says : “At balf-past twelve to-night, Vesuvius has opened a new crater, to the right of the two cones of last year. At the half (à la moitié) of the great cone on the side of Bosco Reale, another crater has opened, pouring forth : current of lava. In the same direction, and precisely in the plane of the lara of last year, two other little craters, which cast up many streams, have been formed. The principal cone is full of crevasses, through the strong shocks it has received.

EGYPTIAN LAND SURVEYING.–The British Museum has obtained possession of a papyrus containing, in hieratic characters, a fragment of a treatise on geometry applied to land surveying, with illustrative figures. It shows how to measure squares, parallelograms, and various triangles. It is supposed to belong to the date of the twelfth dynasty, contemporary with Solomon, and it is copied from a more ancient treatise.

1

« AnteriorContinuar »