"The South Ecnamgton Museum" non' takes the lead, and surpaaaea all fonner soientiflc institutions bj its vostlj superior collec- tion of models and works of art, there will he doubtless monj thousand yoimg people who may remember (it is hoped) with some pleasure the numerous popular lectures, t Unstraited with an ahuudaace of interesting and bri Uiaot esperiments, which have been delivered withiu the walls of the Royal Polytechnic Institution during the lost twenty years. [NPLECTION OB DIFPSACTIOK OF LIGHT 328 CHAPTER XXVL POLABIZATION OP LIGHT 335 CHAPTER XXVn. BTEAK-EITGIIi Z — COf UUlued 413 -^ ■• \ VM ■" .' \ / INTRODUCTION".with much quiet impressiveness, " Ukat if if trttt to U vhr. Again, if a ira^on be loaded THE Omrrtt E OP GEAVITT.
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magneto-electricitt CHAPTEE XX, DIA-MAGNETISM COli TENTS. The author has endea- Toured to arrange the manipulations !
FAOS , OPTICS, AHD OFn CAL OTSTKTTICESTS 255 CHAPTER XXTT. On many occaaioua the author baa received from his young friends letters, containing all sorts of inquiries respecting the mode of performing experiments, and it has frequently ocouixed that even some years after a lecture had been discontinued, the youtli, now become the young man, and anxious to impart knowledge to some "home circle" or country scientific institution, would write a special letter rcferrbg to a particular esperiment, Doid wish to know how it was perfori Tied, The following illustrated pages must be regarded as a scries of philo- sophical experiments detailed in such a manner that any young person may perform them with the greatest facihty.
Every boy should ride "a hobby-horse" of some kind; and whilst play, and plenty of it, must be his daily right in holiday time, ho ought not to forget that the cultivation of some branch of the useful Arts and Bdencea will afford him a delightful aud profitable reciealiou when 3 ISTBODUCTION. Shall it, then, be said that any boy possessing the Godlike attributes of Mind and Thought with Free- will can only cat, drink, sleep, and play, and is therefore lower in the scale of usefulness than these poor birds, beasts, fishes, and insects ? _ „ - ■- ■ hj f Usankn ti evntbng v Udi an be aec B 100 Cd L l£e iv B, tfe CBtfc. Suh a ■■■eraas m^ Tsricd "'Bi**'^ of todies mmt neces Barih- ha Tc ctrtain qnalilirt, pec BBaritia^ orpnu Krtia; Mid hsce «e eoae in tbe fint jbet to coaler "Tlie gc Bcm powc B pn^otiesof raitter." Tims, if we place Uo^ of vmd oc sto MC in ■mpaai Qon, ve eai £110117 the v Dod ■ one of tbe fiist and i DO0t a BRifeof the wi^ifit Mrfw Mttw, fc Bil is called r Jmft Mflra Ul Uf, Ii^ue tfae pt Uft Aj pcaa ca at d by all aolid, liqvd, and L gaaeo DS bodies, (J fi Siiig a space to the exdnnm (^ otixis mtil th^br M lemoned, and it admits ot coanj amnmig Qhstntkn^ both n t^tds B'tl Kproof and modificatian of the ytofatj.
RUHMKORFF's, HEARDER's, and BENTLET'S coil APPARATUS . u a metliodical, simple, and popular form, and will indeed be rewarded if these experiments should aroose dormant talent iu any of the rising generation, and lead them on gradually from the easy reading of the present "Boy's Book," to the study of the complete and perfect pliilosophical worlds of Leopold Gmelin, laraday, Brandc, Graham, Turner, and Fownes. Let " Young England" enjoy hb manly sports and pastimes, but lot him not forget the mental race he has to run with the educated of his own and of other nations ; let him nourish the desire for the acquisition of '* scientific knowledge," not as a mere school lesson, but :is a treasure, a useful ally which may some day help him in a greater or lesser degree to fight " The Battle of Life.'* BOY'S PLAIBOOK OF SCIESCE. air, itc M^ nd kaab ef t Un ba(k CH^Rbc Bsi Te tern maf/er.
Copyright infringement liabili^ can be quite severe. Tho Professor remarks, "To understand the scene more folly, the leader mnst fancy himself ou a small, rocky island on a mountainous coast, the weather calm, and the aky at the beginning of tiie eclipse Bcven-tcntlis covereii wit U thtu and origlit cirro-strati clouds.
About Google Book Search Google's mission is to organize the world's information and to make it universally accessible and useful. i l ATB ntori Moa or c KBasarmr at tsb kotak o tii M» ic» KTC BTC. As the eclip^ approaches, the clouds eraduallj darken, the rays of the sun are no longjer able to penetrate fliem through and through, and dreuch Ihem with living light as before, but they become darker than the sky ,«^inst which Uiey are seen.
Public domain books are our gateways to the past, representing a wealth of history, culture and knowledge that's often difficult to discover. oxygen gas, and four parts of carbonic acid vapour in every ten thousand parts of air having the following relations as to weight ; — Nitrogen 972 Oxygen 1105 Carbonic acid 1321 It might be expected tlat these gases would arrange themselves in 3or atmosphere in the above order, and it that were the case, we should have the carbonic-acid ;af (a most poisonoas one) at the bottom, and t OBOhing the earth, then the oxygen, and, last of all, the nitrogen ; G * ' boy's PLi. state of things in wliieli omd Ru«i^ lire could not exist.
Marks, notations and other maiginalia present in the original volume will appear in this file - a reminder of this book's long journey from the publisher to a library and finally to you. The gases do not, liuwcrer, separate : indcei^ thej seem to act as it vere like vaeammt to one aaother, and " the diffnaion of gases" has become a recognised fact, goreroed bj fixed layrt.
The cells are so constructed as, ^vith the least quantity of material, to have the largest sized spaces and the least possible interstices. The bird called the nine-killer is an arith- metician, also the crow, the wild turkey, and some other birds. He does not only build houses, but constructs aqueducts, and drains to keep them dry. Matter, in the eiperimei tujduced, appeurs to be pcnetnt U^ — ' " - nroiiorty of impenetrabilitjl ilj to bo a ereation of fancy t . Cotton wool may bo placed of wine because it is simply greatly extended am!