378 



* KNOWLEDGE ♦ 



[Mat 1, 1885. 



instructions are given for every process, and illustrations 

 appear of all the 3])paratiis as employed. The difficulties 

 which beset the b( ginner are lucidly cleared up ; in fact, a 

 day or two's practice, by the aid of this little volume, 

 ought to make a passable photogrnpher of a man who had 

 never seen a cameui before in his life. 



The Asdepiad. By Benj. W. Richardson, M.D. 

 (London : Lougmans, Green & Co. April, 1885.) — 

 Addressed primarily to the medical profession, it not vin- 

 frequently happens that Dr. Richardson's excellent journal 

 contains mat er of great interest to the layman. This is 

 the case in the current number, in which a paper entitled 

 " Researches on Re^uscitatiru; " possesses pecular importance 

 in the face of certain recently reported American experi- 

 ments in which it is asserted that dogs have been restored 

 to life after rigor mortis had set in ! The physiologist, 

 too, will find himself repaid by the perusal of an essay on 

 " Measures of Vital Tenacity." 



The Child's Pictorial; a Monthly Coloured Magazine. 

 No. I. ( London : Society for Promoting Christian Know- 

 ledge.) — Here is a new candidate for juvenile favour which 

 must infallibly become popular with the small folks. It is 

 intended for children between four and eight, and, with its 

 wealth of .simple and amusing stories, and of coloured 

 pictures to illustrate them, cau hardly fail to become a 

 great success. 



We have also on our table :- — Comfound Oxygen ; its 

 Mode of Action and Results ; The Medico-Legal Journal, 

 Proceedings of the Geohgical Society, Bradstreets, Naturen, 

 The Sanitary Kews, The British, Foreign, and Colonial 

 Penny Postal Guide (well worth the money). The Kansas 

 City Review, The Journal <f the Society of Arts, The 

 American Druggist, The Medical Press and Circular, The 

 Tricyclist, Wheeling, The Country Brewer's Gazette, and 

 TVie Buxton Advertiser. 



THE SPORTSMAN'S EXHIBITION. 



" A LL work and no play" lias a proverbial effect upon John's 

 J\. intellertual powers ; hence, any attempt to minister to the 

 improvement of means of ]ej;itimate recreation possesses something 

 more than merely ephemeral interest, and the amount of ingenuity 

 and skill in the ajiplication of science shown in many of the articles 

 displayed at the recently-closed exhibition at the Agricultural Hall 

 certainly deserve some notice here. Amid much that was worth 

 notice we were struck with a couple of novelties iu boats ; one a 

 paddle-wheel one propelled hy treadles ; the other a canoe, shown 

 by Mr. Turk, with a shifting keel which eonld be lowered or drawn 

 np at will ; when down, it enabled the canoe to sail and keep well 

 up to the wind. " Galvanii-ed" iron sheds for covering tricycles, 

 forming hot-houses, ic, exhibited by Hayward & Co., appeared 

 very efficient. An excellent novelty in harness, in the shape of 

 Webster's " Patent Ahmiinium Metal," was shown. Strong 

 and rustless, it not only serves admirably for the decorative 

 parts, but makes bits which leave nothing to be desired. 

 Mr. T. Turner had some excellent hammerless guns, and, 

 what is more of a novelty, a simple movable muzzle for convert- 

 ing an ordinary cylindrically-bored gun into a choke-bore, and vice 

 versO.. One of the most efficient joints for fishing-rods that we 

 have seen is the new jiatent one by the Messrs. Anderson, of 

 Edinburgh. Mr. Slater also exhibited excellent fishing-tackle. The 

 wants of fishermen and other.s iu the way of waterproof attire were 

 amply provided for; a double coat, made by Bates & Sons, for 

 enabling two people to sit together on a dog-cart, Ac, and keep dry 

 instead of dripping over eacli other, and the " Euknemida" water- 

 proof boots may be mentioned in this connection. Carriages, dog- 

 carts, "cycles" of all and every description, materials for cricket, 

 football, polo, tennis, billiards, and games of every description 

 abounded ; and we have donbtles-s passed over much that was 

 curious, novel, and interesting ; but we have just jotted down a 

 few of the more noticeable things wliich struck us in passing. Mr. 

 G. Rees appealed to admirers of sporting art with some really high- 

 olass coloured engravings. 



" Let Knowledge grow from more to more." — Alfbed Tennybor. 



Only a small proportion of Letters received can possibly le »n- 

 aerted. Correspondents must not le offended, there/ore, should their 

 letters not appear. 



All Editorial communications should ?)e addressed to the Editor 01 

 Knowledge; all Business co')nmunicationa to the Poblishebs, at the 

 Office, 74, Great l^ueen- street, W.C. If this is not attended to 



DELAYS ARISE FOB WHICH THE EdITUB IS NOT BESP0N8IBLE. 



All Remittances, Cheques, and Post Office Orders ehovld be modi 

 payable to Messrs. Wyman & Sons. 



The Editor is not responsible for the opinions of correspondents. 



No COMMUNICATIONS ABE ANSWERED BY POST, EVEN THOnOH STAMPED 

 AND DIRECTED ENVELOPE BE ENCLOSED. 



DARK TRANSIT OF JUPITER'S IVth SATELLITE. 



[1687] — That rising observer. Dr. Spitta, of Clapham, has com- 

 municated an observation of such interest to me that I am induced 

 to ayk leave to put it on record here. Watching the transit of 

 Jupiter's IVth Satellite, on April 18, he noted, as other observer* 

 have done before liim, that it appeared black while crossing the 

 face of the planet (he had, however, a suspicion of a browvish tint 

 for a short time), and that its figure was not circular. The inte- 

 resting part of his observation, though, lay in the fact that the 

 blackness persisted, even when the satellite was on Jupiter's limb, 

 and, in fact, until it had crossed it and was vis'.ble against the dark 

 background of the sky. I have myself, of course, seen this same 

 Satellite crossing Jupiter's disc as a dark and irregularly-shaped 

 spot, but it has always vanished as such before reaching the limb, 

 and become invisible with my optical means until it was projected 

 on the sky. WiLLiAU Noble. 



Forest Lodge, Maresfield, Uckfield, April 25, 1885. 



[As far as I can discover, the observation referred to above by 

 Captain Noble appears to be unique. — Ed.] 



PARHELION. 



[1G88] — While crossing London-bridge on April 21, I noticed & 

 remarkable appearance in the sky at 5.35 p.m. The sun was 

 approaching the horizon, and, on its left, about once and a-half its 

 distance above the latter, was a very luminous spot, shining 

 through some hazy clouds. The spot was highly coloured, red on 

 the side nearest the sun, ranging thi'ough the colours of the spectrum 

 to blue on the other side. 



On my arrival at Streatham the spot was still visible, but more 

 faint, whilst, on the other side of the sun, at an exactly similar 

 distance, was another like appearance. Were these examples of 

 " mock suns ? " Perhaps some of your readers have seen similar 

 phenomena ? The sky looked decidedly "windy," and I fearsome 

 abnormal state of the aii' portends a speedy end to the fine weather 

 we have lately enjoyed. John H. Bateman. 



: METEOR. 



[IG89]— On Wednesday night, 15th inst., at lOh. 20m., in the 

 east, a fine meteor was observed here, at 50° altitude; colour 

 intensely blue, iu a horizontal line from south to north from j8 

 Herculis to /3 LyraJ, about 12° in length ; head, apparent size of 

 Sirius ; duration of flight, 2 seconds. Was on watch for meteors, 

 being the period for April meteors. In hopes some of your corre- 

 spondents may have observed it from their point of view, 



James Blackwood, Observer for the Scottish Met. Society. 



INTELLECT AND THE SIZE OP THE BRAIN. 



[1C90] — Since Mr. Taunton has forgotten the name of his " very 

 famous German professor," and does not think fit to tell as th* 

 name of his " distinguished Gei'man doctor," he must not be sur- 

 prised if wo accept his facts only cuvi rjrano salts. 



Have the results of these researches ever been published? If 

 not, we must wait until the full details are given to the world 

 before we venture to estimate their evidential value. If they haT« 



