Fl-ATHFh'S A\n Fl.KlHT. i;^ 



>0 



)>ill uliilsi " |•lv»•nillL,^■■ and a|)|>li(.'(l to the Icutlurs 

 s<» as to i-ciidcr llifiii wattijiroof. 



\ v\'\ t<\v s)»r(i,-s lik)' to Hv or ro<^st witli a 

 slroi|._r wind Mowing iM-liind iIrmh, as it rntllcs ilicir 

 pliimaiLre. 



From a roiisi«ii-rat ion of ffa^lKTs wc pa^s on to 

 spuak ol tlii^dit. of" uhirli then- aiv thriM' ino(l(.'s — 

 (I) sailin'_r <»r >oarinLr. <-) i^lidinLr. and (.*>) tlaj>j)in<,^ 

 Tlif '_rr»'at majority (•(' I'ifds jn-actis.' the second and 

 third tnttliods. and l>iu tew tlio first. 



'I lit- tliLrlit t'«-atliri-s in all liirds' wiiiLjs arc more 

 or 1' ss convex or ronndcd on ilic outside, and eon- 

 cave or liollnu on the insi(l<-. >.. that h\- takiiiL; a 

 mod. rat. ly laru'e (.ne and strikiiiLT the air with it, 

 tir>t uitli the rouniled sidr dnun. and then with 

 the hollow sid<- down, it is at on«»' divccvcivd that 

 the ir^i.staner ni tlie at inosj .he)-* • is nnidi uTeaier 

 in ihe latter than in tlie fMrm<r stroke. lla\iiiL; 

 l>y tliis little exjierimcnt formed some idea ot" the 

 JittinLT powers o|' a sini^lc leather dri\<ii rapidly 

 ihroULdi s|ia«e. it is easy to (•»»neei\e wliat a nnnd>er 

 may I'e ahle to ae<-oniplish when tirml\ inlerlocke(l 

 ami drivrii ly powerlnl mnseh-s, of wliicli a i»irds 

 win-- is >aid to contain no l.-vs than lort \ -eii^lit. 

 The air slips o|] the r.iiinded sid,- .,t' this WMndcrlnl 

 cond'inati >n of tliudit feathers in the same wav tliat 

 ir docs from the c<»vcr df' an op.n umhrdla. and is 

 ean-ht hy the hol'nw side jnst as it is h\ the inside 

 <it an nml>rclla. 



\\ in^is vaiy greatly in shape and size, accord i n ;■ 



