iNDUCTIVE PREFACE. THE course in Elementary lhysical Science, of which these ptges form the first instalment, is the outgrowth of various experiments made filst in the prl1 lic scllools of AIichigan, later in 111.. Pelix Acllers 1Vol. kingmens Scllool in New Yo1. k City, uid finally, during the past four years, in the private school of All-S. Quillcy A. Shaw in Iloston, --a scliool founded l yR lis. Shaw, the laughter of tlie great naturalist, 1 1. ofessor 1, ouis Agassiz, for tlie pnrl ose of developing nlethods of nature study that will secure to the young stuclent the bcst preparation for holtlilig through life intimate convei-se wit11 nature. The elldless source of happiness which this gives is a heritage that h h . Shaw 11ns believed will come tlways to all students who are introtluced to the st iclyo f the earth by the natural neth hod. The authors etlucationnl views were so fully in accord with her own, that she gave him perfect liberty in laying out tlie work in tlie Physical Science branches of nature study for pupils f1.01n twelve to eighteen years of age. The results i. eached have been such that many of the best eclucatols of Roston and vicinity have recoilrmended and urged that the course be given a wider field of usefulness. 1Vhile this work has been largely the result of classroom experiment, indebtedness is freely acknowledged to TO T H E T E A C H E R . No picrio isk nowletlge of physics is Lqolntelyn ecessary but a clear collceptiol of the o7Gect aimecl at is im perative, in order tlmt the o r lIin ay be done in a seieiltific n1 lnner, and the Ilighest success attained. That object is not primarily to give tlie p11lil a few 1 11jsieal f cts out of the great al uiclaiieeo f trntl, a few essenti lls of l i i c his all that is possible ill any couisc, 1 nt to cl ltivateh is paw eis of ol servntioiai nt1 i i lepci detnllto igllt. 15very young clriltl 1 asscsses these oweis is, and is eager to use tliein Imt a systein exclnsively of 1 ooli-erlncatio lt ends to cle stray them. Sollie olie llas ti. itl fulslyai d, No illjustice wo ild bc clone to a teacllcr if his skill anrl the edncative value of his lessolls -else 1neasni. ec1 1 y his success in making ellilclrei r eason 011 t co elnsion f rso ln o1 served or stated 77 facts 111rl we nlay ttl l tll tf or the 1 est tliscil lilie those fiteh slio ilclb e observetl, not stntecl. That eclucatioil is of the most value in every walk of life wl icli not only enaLles its possessor to reasoli coi...
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