"RECREATIVE SCIENCE," No. 11, wiU be Published 31st MAY, 1860. 



Of No. 10. 



PnYSlCAT, EVTDENCEg 01' THE InTEENAL HeAT 



OF THE Earth ; Part II. — Geological and 

 Planetary Strtjcture of the Earth. Bx 



Shirley IIibberd 325 



Robert's Test-Lines. By Tuffen West 333 



Practical PnoToaRAPHY. By Joseph Side- 



BOTHAM 335 



The Odours of Flowers. By Benjakin Ab- 

 bott 340 



Coal and Coniferous Wood under the Micro- 

 scope. By J. R, Leifchild 343 



Lead ; Part II. — In the Furnace. By Harry 

 Napier Draper 349 



A Meridian-Line. By W. C. Bueder 



The VEaETATioN of a Decayed Nut. By W. 



F. COOPEE 



Meteorology of May 



Astronomical Observations foe May 



Things of the Season — May 



Mr. Noteworthy's Corner 



Naturalist's Telescope 



Occultations of Jupiter's Satellites ... 



Celestial Objects , 



Biological Teems 



Electeic Illumination 



A New Planet 



FAGB 



353 



356 

 358 

 358 

 359 

 359 

 35a 

 3^ 



3> 

 36. 



The Articles in " RecireatiTe Science " axe Copyright, and the Right of Translation is reserved. 



Communications for the Editor to be addressed to the Publishers, Messrs. G-roombeidge & Sons, 



5, Paternoster Eow. 



•,* Correspondents are desired in all cases to communicate their real names and addresses, wWct will, as a rule, be held in confidence. 



Letters needing a reply should reach us by the 15th at latest. 



OUE LETTER-BOX. 



Water Glass in Photographt.— C. P., Vauxhall.— We are 

 not aware if soluble glass is anywhere made lor sale, but application 

 may be made to any of the undermentioned houses, and we name 

 several in order to be impartial and suit the convenience of other 

 readers, who may make choice of those nearest them : — Morson & 

 Son, Southampton Kow, Holborn ; Hopkins & Williams, Cavendish 

 Street, Portland Place ; Simpson, Maule, & Co., Kennington ; 

 Garden & Son, Oxford Street; Polton, Holborn Bars. 



Kinnear's Camera.— CosMoroLiiE. — You will see that your re- 

 quest has been complied with. All similar requests will be complied 

 with as far as may be consistent with the plan and purpose of the 

 work, and the probability of meeting the wants of readers generally. 



Electeotiping. — Z. — Keep one or two crystals of sulphate of 

 copper on the shelf of the trough, to maintain the strength of the 

 solution, and make it last an indelinite time. 'J he sulphuric acid 

 Bolulion is so cheap that it is advisable to renew it after every eight 

 or teu depositions. The renewal will not cost a farthing. 



Eeceivkd. — "First Traces of Life, or the Geology of the Bottom 

 Eocks." By S. J. Mackie. Groombridge & Sons. The poetry of 

 fact and the poetry of diction, ably employed in picturing the first 

 fruits of creative energy in the earth. — F. W., MS. — Call. Good. — 

 E. H. S. — Compass. There can be no need to engrave the diagrams. 

 — J. J., King's Lynn. — There is no such work as the one you 

 inquire for. The Nautical Almanac is the book you want. — J. A. — ' 

 The subject will shortly have special treatment. — W. Walsh.— 

 W. N.,Wesleyan College. 



MicEoscopic Earths.— F. W., Leickster Sstjahe. — A pinch of 

 TripoU powder, guano, or any other of the ordinary earths used as 

 microscopic objects, can be had for pence, or nothing, in any street 

 in London, at drysalters, oil-shops, etc., etc. Of course, when se- 

 lected and mounted, they acquire value, and must be had tlirough 

 the usual channels. If you are handy at nioimtiug, you will have 

 no difficulty in getting samples. Such things are as plentiful as 

 bread. 



Completion of the Nature-Printed Sea-Weeds, in 4 Vols. Royal 8vo, Price £2 2s. each. 



Shortly icill he Published, Vols. Ill, and IV. of the 



NATURE-PRINTED BRITISH, SEA-WEEDS. 



NATUEE-PEINTED BY HENEY BEADBTJEY. 



A HISTORY ACCOMPANIED BY FIGURES AND DISSECTIONS OF 



THE ALG^E OF THE BRITISH ISLES, 



BY WILLIAM GEOSAET JOHNSTONE AND ALEXANDEE CEOALL. 



CONTENTS. 



VOLS. I. & II. 

 RKODOSPERMEJE.-ltED SEA-WEEDS. 



Vol. I.— Series I. DEsmosPKRMEiE. 90 Species. 70 Plates. 

 Vol. II. — Series II. GoNGYLosrERME-n. 88 Species. 63 

 Plates. With Dissections of all the Species. 



VOL III. 

 MELANOSPERMEJE— OLIVE SEA-WEEDS. 



Series III. 95 Species. 52 Plates. With Dissections of all 

 the Species. 



VOL. IV. 

 CHIiOROSPERMEJE-^GKEEN SEA- WEEDS. 



Series IV. 102 Species. 25 Plates. AVith Dissections of all 

 the Species. 



Synoptical Tables of the Orders, Genera, and Species. General 

 View of the Structure and uses of the Sea-Weed 

 Family. Sketch of their Classification and Distribu- 

 tion. Instructions for the Cultivation of the Alga?, 

 their preservation in the Herbarium, and their pre- 

 paration as objects for the Microscope. 



In a few day* will he published, price £2 2s. fcompleiinq the work in 2 Vols., price £4 is.J, Vol. II. of the 



OCTAVO NATUEE-PEINTED BRITISH FERNS. 



BEIIN'G FIGURES AKD DESCEIPTIONS OP THE SPECIES AND VAEIETIES OF FERNS FOUND IN THE 



UNITED KINGDOM. BY THOMAS MOORE, F.L.S. 

 NATUKE-PKINTED BY HENEY BHADBURY. 



The Work contaias 122 Plates and 500 pages of Letter-press. Eoyal 8vo, uniform with the " Nature-Printed British Sea- Weeds." 



