WmUrr</M fti/i'l i>\inm;H of lh<; J 1 -year miru>yt'yUi nUu'/i J^>15. 



Tlcro JH, ji iH Iriu;, a h\r<m% <tlf;valion ufjont ffjc lime of' Hi<; 

 niinifnuffi in (!)'• ''oMcHf i/v<m\> nit(\ a «jf/all ';)';valion af <'/// in (lio 

 warfri on';, l>ii( nolfiin^ i« \oM of ;i rnrv; vitrvo;6\tt>w\\iii^r wifl» (ji<5 

 11 'year one, TIi/h (at>K; flofjx nof fon(!r>n TaM't II of' llif. {'irnf 

 (V>nifnnnir'afion, For ffio mHt j(h vainc in only nniall, \ft'j'imm Ww, 

 niat'-rial, lliouj^fi \t\\r(;r, in m) wanfj : in 2i> <;I<;v<;n-yoaf' vycU'M only 

 .M obw^jrvf) raJ'/'-.H of' w,wi;v<; or vojy wjv'rro w'ttiU'A'H arc available. 



Til'; fellnnr' f»ef'f,iif'l>afi<;nK fliOH H^M'fn (o Ik; Htf Hiroitfs^ tltni, (hf>iij(li 

 flicy cannol rnttno, t\n> rliHa[)(u;amnr'e of' flic (j;rojiU',i' flucfnafion, ffi<;y 

 f»r;i/'firally aboIi-'-h Iir;r<; tli'; ll-yrfar ''ycl<5, ntirïi af. I'-anf in flie <'aH'; for 

 III»; <lafa af ]n<-Mo.fit ittuU'V 'liwMiHHion, VVifli rej^ar'! to i\ni H(if»[>oHifion 

 ttf, iUa en'l of (fie Kirnf, Crnnfnnni<'afion, our conelnnion (lieref'ore 

 ifntni \>Cy fhaf, flie roHdII of' a more ffirn'oiij^li inveHfij^afion f>f ;ill fho 

 availaM'; 'lata iH nfjrafivf, 



W<5 have alr'wiy refriark'-'l Ifial, l\i<;t<; aj>[;<;arK only a very itnunii- 

 \tU;t<; rorr^'Jafion hetvv/'.n lli'; i'f<',<iu<;ticy r>f' Ifie Hun H|>otH an'l f lie 

 owillafiofi of' III'; l''jnf>enUur'', Tfi'; eorr';M|)r>n<lenee f;wame only Hornrj- 

 wliaf more apparenf if', f'r>r fli'? <'oM winfern, we eofnt>in';'l four 80-y. 

 (M;rio<lH in on'? of .';50 yout-H. Ilowf.ver (lie inHiea(io;i of f;aralleliHjn 

 of»fain''.n f>efw<;en fli'; perio'lieify of (lie nevere winferh an<l fJiaf of 

 di'; '|uan(i(y A/ m of (lie hiui'h ow^illafion, Io/wIh nn f/> eonnirJer more 

 c,U>m\y (lie oflier <;l<;m<!nfH of flie Hun'H owillafion. For a lonj^ (ime 

 it IjaH l»<'en well known fliaf ffie maximum of an fleven-year eyele 

 f\M a rule Hucerje'lH (li'; minimum (li*; f'ah(<'.r, t\t'; liij^lier flie wave. 



Ak di'-. amf»li(M'l''. of (I)'-, Hun'H ji'-.rio'l muHt lie rewfrief/Ml wifliin 

 r'^;rliiin lifnifH, (liin niij(li( \>t; Hii(>f>OHe'l (o mean (liaf, flie «fe^'jmeHH of 

 (li<; aHe<'.nf|in(^ plia'r','-. ref»r'':','',n(H fli'; only variahl<; elemr;nf in flie hun'H 

 OH<'illa(ioii ari'l (lia( ffi'- minimum (liiri wouM n;m:nfi r'oni(iJint, at 



Jl* 



